Electric forklift multifunctional wet drive system

Abstract

The invention relates to an electric forklift multifunctional wet drive system which comprises a drive axle assembly, a reduction gearbox assembly and an alternating current motor. The drive axle assembly is of a three-section structure, and comprises a wheel edge wet brake system, a wheel edge planetary gear train deceleration system and an axle shell, wherein the axle shell is located in the middle section of the drive axle assembly, and the two ends of the axle shell are connected with the wheel edge wet brake system and the wheel edge planetary gear train deceleration system correspondingly. A wheel edge planetary deceleration structure design is adopted, the outer dimensions of a axle shell central drive axle are reduced, the ground clearance is increased, matching of small tires is ensured, and the speed ratio of a transmission system is increased, so that a whole vehicle can be better matched with the alternating current motor with high speed and low torque; a fully enclosed multi-disc self-cooling type wet brake is adopted, the structure is compact, large braking torque can be provided under smaller pressure, dustproof, waterproof effects are good, and service life is long; and friction plates of the brake is made from paper-based friction materials, and the characteristics of low brake noise, good thermal stability and good environmental protection are achieved.

Description

technical field [0001] The invention relates to the field of forklift transmission systems, in particular to a multifunctional wet drive system for electric forklifts. Background technique [0002] With the development of global forklift manufacturing technology, users have higher and higher requirements on the longitudinal and lateral stability of the whole machine, high load capacity, selection of high-performance AC motors, and operating comfort. This requires the vehicle to have the characteristics of small front overhang, large battery capacity, AC motor as the power source, small wheel radius, and large space for the operator's legs. For this reason, it is necessary to develop a matching transmission system. The current electric forklift transmission system has the following disadvantages: (1) The drive axle adopts dry braking. When using small wheels, limited by the size of the rim, the outer diameter of the brake is small, so the braking force cannot meet the require...

AI Technical Summary

Problems solved by technology

The current electric forklift transmission system has the following disadvantages: (1) The drive axle adopts dry braking. When using small wheels, limited by the size of the rim, the outer diameter of the brake is small, so the braking force cannot meet the requirements, and the brake life is short ; (2) The fulcrum of the gantry load is at the center of the bridge body, resulting in a large front overhang of the gantry, a high height of the slewing center of the gantry, a large pulling force of the tilting cylinder, and poor longitudinal and lateral stability of the vehicle; When the machine is matched with small wheels, the ground clearance and the speed ratio cannot be increased at the same time, that is, when the passability is good, the speed ratio is small, and a high-performance AC motor cannot be selected, and the vehicle's climbing ability is poor; (4) In order to match the high-speed AC motor, the drive unit must increase the speed ratio, resulting in a larger size, occupying the interior space of the vehicle and making it impossible to install a large-capacity battery

The above problems seriously restrict the performance of the whole machine, so it is necessary to redesign a multifunctional wet drive system for electric forklifts to solve the above problems

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