Forklift truck with full-suspension frame structure

Abstract

The invention relates to a forklift truck, and aims to overcome the defect that according to due to frequency brake, an existing full-suspension frame collides with a front axle shock absorber and is prone to damaging the shock absorber. The forklift truck comprises a front axle, a power assembly, a frame and a brake feedback locking device, wherein the front end of the frame is connected with the front axle through the front axle shock absorber, the brake feedback locking device comprises a hydraulic oil cylinder connected between the front axle and the frame, an oil inlet and outlet pipeline of the hydraulic oil cylinder is provided with a control valve in linkage with a brake system, and when the brake system brakes, the control valve cuts off the oil inlet and outlet pipeline of the hydraulic oil cylinder. According to the forklift truck, when the brake system brakes, the control valve cuts off the oil inlet and outlet pipeline of the hydraulic oil cylinder in a closing mode, and a piston rod of the hydraulic cylinder can not stretch or retract freely, so that rigid connection is formed between the front axle and the frame through the hydraulic oil cylinder, it is avoided that huge inertia of the frame in the braking process impacts the front axle shock absorber, and the front axle shock absorber is protected from early damage.

Description

technical field [0001] The invention relates to a forklift, in particular to a forklift with a fully suspended frame structure. Background technique [0002] For existing small and medium-tonnage forklifts, the installation structure of the powertrain (including the engine and gearbox) is usually semi-suspended, that is, the front end of the powertrain is rigidly connected to the front axle, and the rear end (fan end) of the powertrain is connected to the frame. separated by damping pads. At the same time, the front end of the frame of the forklift is also rigidly connected to the front axle. Since the powertrain will generate large vibrations during operation, the vibrations can be easily transmitted to the frame through the front axle, and then transmitted to the driver's contact parts such as the seat and steering gear, which seriously affects the driving comfort of the driver. Some existing forklifts also use a full-suspension frame, that is, the front end of the frame...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the semi-suspension structure of the powertrain in the existing forklift has low comfort due to the vibration of the driver's seat and the steering machine due to the transmission of vibration, while the full-suspension frame collides with the front axle due to frequent braking. The shock absorber is easy to cause damage to the shock absorber of the front axle, and a forklift with a fully suspended frame structure and a shock absorber that is not easy to be damaged is provided.

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