Straddle forklift

Abstract

The invention discloses a straddle forklift, which comprises a lifting and unloading device and a driving device, wherein the driving device comprises an engine and a hydraulic transmission device; the hydraulic transmission device comprises a hydraulic pump, a hydraulic oil tank, a reversing valve and a hydraulic cylinder; the hydraulic oil tank, the hydraulic pump, the reversing valve and the hydraulic cylinder are connected through hydraulic pipelines; the output shaft of the engine is connected with the input shaft of the hydraulic pump through a clutch to drive the hydraulic pump; the hydraulic cylinder is provided with an ejector rod capable of extending out of the hydraulic cylinder and stretching up and down; and the ejector rod is connected with the lifting and unloading device. The engine is used as driving motive power, so the straddle forklift is limited little by power and has high lifting efficiency and lifting capacity. The straddle forklift has low cost, can be used in all weathers, and is simple in structure, convenient to maintain, longer in service life, stable for unloading, safe and reliable.

Description

technical field [0001] The invention relates to a leg-type forklift using an engine as a lifting source power, and is mainly suitable for the fields of loading and unloading heavy objects. Background technique [0002] The current various forklift trucks usually use electric or manual lifting systems. Its working principle is: the electric motor or manually drives the hydraulic pump to generate high pressure, thereby driving the hydraulic cylinder to perform loading or unloading actions. [0003] The lifting system of the electric plug-in vehicle mainly includes a battery, a motor, a hydraulic pump, and a hydraulic cylinder. The working principle is: the motor drives the hydraulic pump to generate high pressure, and drives the hydraulic cylinder to lift. When it is necessary to unload, operate the release lever to unload. Since the power source is a motor driven by a battery, the performance is greatly affected by the battery. Due to the limited capacity of the battery, t...

AI Technical Summary

Problems solved by technology

Since the lifting speed of the manual hydraulic pump is mostly about 20mm / time, if a heavy object is lifted to a height of 2 meters at a time, the hydraulic pump will have to work more than 100 times, which is time-consuming and laborious, and the operator is particularly prone to fatigue

The lifting capacity of the manual hydraulic pump will also be limited by the operator and the manual pump, making it impossible to lift heavy objects

Since the manual hydraulic pump needs to work frequently, the loss of the pump system is large and the service life is short

[0005] Therefore, from the above two lifting systems, it can be seen that the electric forklift lifting system has good starting performance, simple and convenient lifting, and easy control, but its existence requires charging equipment, high basic investment, long charging time and long working time after charging. short, can not be used all-weather, and the battery should not be subjected to large impact and vibration, the requirements for the working road are relatively high, and the service life is short

Due to the limitation of battery capacity, the motor power is small, and the lifting speed and lifting capacity are limited to a certain extent.

[0006] However, due to the use of manual pumps, the lifting efficiency of manual lifting forklifts is very low, personnel are prone to fatigue, and the lifting capacity is also very low.

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