Rear wheel drive electric forklift provided with wet-type braking front axles

Abstract

The invention relates to a rear wheel drive electric forklift provided with wet-type braking front axles. The electric forklift comprises a front axle mechanism, a hoisting system and a forklift body system. The forklift body system comprises a frame, a driving rear axle and a driving steering mechanism. The front axle mechanism has a split type structure, and is composed of a left front axle and a right front axle. The left front axle and the right front axle are the same in structure but opposite in direction, and are respectively arranged on the left side and right side of the front part of the frame. The left front bridge or the right front bridge comprises a tubular axle housing, a planetary gear output mechanism, a wet-type braking mechanism, and a left front wheel or a right front wheel; the planetary gear output mechanism and the wet-type braking mechanism are disposed inside the axle housing; a housing cover is arranged at the axial end of the axle housing; the planetary gear output mechanism comprises an output shaft and a planetary gear mechanism; one end of the output shaft extends to the exterior of the axle housing; and the left front wheel or the right front wheel is arranged at the outward extending end of the output shaft. According to the invention, the load supporting point of a gantry of the hoisting system is lowered, the size of a front overhang is reduced by 19%, the turning radius of the electric forklift is reduced to 1445mm from 1600mm, and the ergonomic design of the electric forklift is optimized.

Description

technical field [0001] The invention belongs to the technical field of transmission systems of transport vehicles, and in particular relates to a rear-wheel drive electric forklift. Background technique [0002] At present, the front axle of the battery counterbalanced forklift generally adopts drum type (dry type) braking. This type of braking mainly has the following shortcomings and deficiencies: The large size of the brake results in large front overhang of the mast and reduced rated lifting weight. Since the braking force of the brake is related to its own size, the larger the braking force required by the vehicle, the larger the outer diameter of the brake. Then the mast, shelf and fork must be moved forward, the front suspension will be increased, and the rated lifting weight will be reduced; The brake has large dimensions and cannot be placed in the rim, resulting in increased wheelbase, vehicle width, and turning radius; The load fulcrum of the gantry is high,...

AI Technical Summary

Problems solved by technology

[0002] At present, the front axle of the battery counterbalanced forklift generally adopts drum type (dry type) braking. This type of braking mainly has the following shortcomings and deficiencies: The large size of the brake results in a large front overhang of the mast and a reduction in the rated lifting weight

Then the mast, shelf and fork must be moved forward, the front suspension will be increased, and the rated lifting weight will be reduced; The brake has large dimensions and cannot be placed in the rim, resulting in increased wheelbase, vehicle width, and turning radius; The load fulcrum of the gantry is high, and in the center of the bridge body, the moment arm of the tilting cylinder is short, which will lead to a large pressure in the cylinder, which will cause hydraulic system failure; The size of the front axle is large, occupying a large interior space of the vehicle, which will reduce the installation space of the battery and the leg space of the driver

The above problems seriously restrict the performance of the battery counterbalanced forklift

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