Distributed drive electric automobile wheel edge integrated system

Abstract

The invention discloses a distributed drive electric automobile wheel edge integrated system. The distributed drive electric automobile wheel edge integrated system is composed of an independent suspension mechanism, an independent turning mechanism, a power drive mechanism and a braking mechanism. In the independent suspension mechanism, one end of an upper connecting rod assembly, one end of a middle swing arm assembly and one end of a lower connecting rod assembly are hinged to the top, the middle portion and the bottom of a knuckle assembly correspondingly, and the other end of the upper connecting rod assembly, the other end of the middle swing arm assembly and the other end of the lower connecting rod assembly are connected to an automobile body, and a transverse stable rod assemblyand a spring damper assembly are connected to the middle swing arm assembly. In the independent turning mechanism, a turning motor and a worm and gear speed reducer are connected to the automobile body, one end of a turning rocker is fixedly connected with a worm gear shaft, and the two ends of a turning transverse pull rod assembly are hinged to the other end of the turning rocker and the knuckleassembly. The two ends of a center pull rod are hinged to the turning rocker middle portion corresponding to wheels on the two transverse rods of an automobile, and a locking hydraulic cylinder is arranged on the center pull rod in the axial direction. By means of the distributed drive electric automobile wheel edge integrated system, high-speed stability and high maneuverability of the automobile can be combined.

Description

technical field [0001] The invention belongs to the technical field of automobile chassis and is suitable for distributed electric vehicles with independent four-wheel drive and independent steering, and in particular relates to a wheel-side integrated system for distributed drive electric vehicles. Background technique [0002] With the shortage of resources and the deepening of environmental pollution, as well as the development of motor drive technology and battery technology, electric vehicles have become the main direction of the development of new energy vehicles in the world, and the layout of electric drive in wheels has gradually been regarded as an electric vehicle. One of the important directions of vehicle development. Compared with centralized drive electric vehicles, in-wheel drive electric vehicles directly install the powertrain in the wheel, canceling the differential, half shaft and other components, with compact structure and high transmission efficiency. ...

AI Technical Summary

Problems solved by technology

[0004] First of all: For example, the distributed drive electric vehicle Qbeak III developed by Danish ECOmove company can reach a maximum speed of 120km / h, but in terms of steering, it is limited by the suspension structure and cannot achieve a large steering angle; the patent of NASA The Modular Robotic Vehicle (MRV) in US14 / 032470 has functions such as in-situ steering and lateral movement of the vehicle, and its maximum speed is only 64km / h

Therefore, it can be seen that the current in-wheel drive independent steering electric vehicle cannot balance high-speed stability and high mobility

[0005] The main reason for the above problems is that there is an irreconcilable contradiction between the wheel and kingpin positioning parameters determined by the suspension, and the steering angle requirements: on the one hand, the mature independent suspension forms are all used to connect the lower hinge point of the kingpin and the two sides of the vehicle body. For the structure of the lower swing arm at the hinge point, in order to optimize the force, the lower swing arm should have a certain opening angle; on the other hand, in order to make the steering light, brake stable, and reduce tire wear, the offset distance of the kingpin wear point in the lateral direction It should be as small as possible or even a negative value, so it is required that the lower hinge point of the kingpin should be as close to the side of the wheel as possible

The above two factors limit the rotation angle of the wheel around the kingpin. Under the high mobility functional requirements of distributed drive electric vehicles, these mature independent suspension forms can no longer meet the use requirements.

[0006] Secondly: for example: although the independent steering mechanism proposed by patents JP2013103665A, JP5483729B2 and NTN company's patent CN102883936A can realize different independent steering function requirements, its steering mechanism is all installed and connected on the wheel, that is, it all belongs to the unsprung mass. The layout of the mechanism will have an adverse effect on the ride comfort and handling stability of the vehicle

[0007] In addition, the traditional left and right wheel independent steering mechanism cancels the mechanical connection between the steering wheel and the steering tie rod. Therefore, when the steering motor on one side fails and loses its working ability, the left and right steering wheels cannot be converted from independent movement to overall movement, which will greatly reduce the reduce driving safety

Images