Chassis drive system and control method of an all-wheel drive all-wheel steering electric forklift

Abstract

The invention discloses an all-wheel drive all-wheel steering electric forklift chassis driving system and a control method, comprising a vehicle frame (E), the vehicle frame (E) is connected to a wheel hub through a suspension system (B), and each wheel hub is provided with a set of Hub drive system (A) and steering system (C); also includes a power system that provides power to the vehicle; all wheels can rotate and steer independently, the forklift can flexibly translate and steer in situ, cancel the deceleration mechanism, and simplify the drive system.

Description

technical field [0001] The invention relates to the field of design and manufacture of electric vehicles, in particular to an all-wheel drive all-wheel steering electric forklift chassis driving system and a control method. Background technique [0002] The drive system is one of the key systems of electric forklifts. There are great differences in the structure of the drive system of existing electric forklifts, and there are also differences in the layout of the motors. For example, in some domestic forklifts, the motor shaft and the drive axle are in a T-shaped structure. , while the drive motor shaft and drive axle of forklifts such as TOYOTA and BALKANCAR abroad are integrated and have a compact structure. The front wheel drive of LINDE's E20 electric forklift and CARER's P50 forklift is completed by two independent motors, which are placed parallel to the drive shaft, with compact structure, good acceleration and climbing performance, large traction, and electronic dif...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor has found that the prior art has at least the following problems: Summarizing the driving forms of the existing electric forklifts, no matter whether it is an AC motor drive system or a DC motor drive system, the drive system layout has the following problems: ( 1) The front axle is used as the drive axle, and the axle load is easily overloaded when the forklift is loaded; (2) One or two motors are used, and the output shaft of the motor is directly installed on the reducer on the front axle. The application of the reducer increases the manufacturing cost and The weight of the whole vehicle; (3) the rear axle is used as the steering axle, and the horizontal hydraulic cylinder steering axle or the tie rod steering axle is used. This steering system increases the manufacturing cost of the car; (4) the front and rear axles are fixedly connected to the load-bearing body , no suspension, poor shock absorption and cushioning ability, poor comfort

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