Hub driving system with double motors

Abstract

The invention provides a hub driving system with double motors. The hub driving system comprises a first motor, a second motor, an in-wheel speed reducer, a braking device, a hub, a hub bearing, a transverse shaft and a steering knuckle, wherein the first motor and the second motor are respectively used for providing motive power for driving wheels; the in-wheel speed reducer is used for respectively matching the rotating speeds of the first motor and the second motor with that of the wheels, and comprises a speed reducer shell, a first driving gear, a second driving gear and a driven gear; the braking device is used for braking the wheels and comprises first braking calipers, second braking calipers and a braking disk; the hub is used for supporting and connecting the driven gear, the braking disk and the wheels; the hub bearing is used for supporting the hub to rotate and comprises an outer bearing and an inner bearing; the transverse shaft is used for connecting the hub with the inner bearing; the steering knuckle is used for supporting the first motor, the second motor, the first braking calipers, the second braking calipers and the hub bearing, and connected with a suspension frame device and a steering device; and the steering knuckle comprises a front shell and a rear end cover.

Description

Technical field [0001] The invention relates to the technical field of vehicle driving, in particular to a wheel hub drive system, and in particular to a wheel hub drive system with dual motors. Background technique [0002] The wheel hub drive system is an ancient and advanced drive method with significant advantages. First, the driving force and braking force of the wheels can be adjusted independently and coordinately controlled according to the needs of the entire vehicle. The vehicle has excellent dynamic characteristics. Second, the overall layout of the vehicle is extremely simplified and flexible, and the space inside the vehicle is maximized. Its disadvantages are mainly increased non-suspension quality, the grounding safety and smoothness of vehicles at low speeds tend to deteriorate, but the ride comfort of vehicles at high speeds has been improved instead. Studies have shown that these adverse effects can be overcome as long as the existing suspension is adjusted ac...

AI Technical Summary

Problems solved by technology

[0006] The technical solution disclosed above has the following problems: it is difficult to integrate with various suspension devices, because the in-wheel motor or the in-wheel motor with a reducer occupies the space where the suspension swing arm is connected to the hub unit; the failure safety is low, If the in-wheel motor fails, the wheel will lose its controllable driving force, which may bring safety hazards; the control requirements of the in-wheel motor are high, and the speed expansion ratio (that is, the highest speed in the constant power area / The maximum speed) should be close to 4, which is difficult to achieve and will lead to a decrease in the efficiency of the in-wheel motor

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