A kind of forklift mast

Abstract

The invention discloses a forklift gantry which comprises an outer gantry body, an inner gantry body and a fork arm carrier. The outer gantry body is fixed to a forklift body, a lifting oil cylinder is used for driving the inner gantry body to do lifting motion in the outer gantry body along a first linear guideway through a first rolling linear guideway pair, and a chain wheel and a chain are matched to drive the fork arm carrier to do lifting motion on the inner gantry body along a second linear guideway through a second rolling linear guideway pair. The forklift gantry has the advantages that the rolling linear guideway pairs are matched with the linear guideways to achieve lifting, and the accuracy of the forklift gantry reaches the micron order; rolling friction of micron-order-accuracy balls of the rolling linear guideway pairs is free of bouncing, abrasion is greatly reduced, shaking in the lifting process is avoided, the stability is good, and noise is avoided; longitudinal andradial motion is directly controlled by the rolling linear guideway pairs, stress of the rolling linear guideway pairs in the longitudinal and radial directions are completely the same, the accuracyis higher, only the control variable in one direction is needed, and the stability of the forklift gantry is effectively improved.

Description

technical field [0001] The invention relates to a forklift, in particular to a forklift mast. Background technique [0002] As a loading and unloading tool with large turnover and high efficiency, forklift can be used for loading and unloading, stacking and short-distance transportation. With the rapid development of my country's high-tech industry, forklifts are more and more widely used in stations, ports, freight yards, warehouses and workshops. As the main working device of forklift trucks, the performance of forklift masts directly determines It affects the performance of the whole forklift. [0003] At present, the existing forklift masts all use large bearings to move up and down. There are two longitudinal rollers and two side rollers on one side, and four longitudinal rollers and four side rollers on both sides. The longitudinal roller is controlled, and the radial movement is controlled by the side rollers. However, the use of large bearings for rolling has the fo...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing forklift masts all use large bearings to move up and down. There are two longitudinal rollers and two side rollers on one side, and four longitudinal rollers and four side rollers on both sides. The longitudinal roller is controlled, and the radial movement is controlled by the side rollers. However, the use of large bearings for rolling has the following problems: 1) The accuracy of the forklift mast is only at the millimeter level, and the accuracy is poor; 2) There are eight vertical rollers and four side rollers in total. The contact surface, and the rolling friction of the large bearing jumps, resulting in great wear and large lifting vibration; 3) The noise generated by the rolling friction of the large bearing is large

The above-mentioned defects make it difficult for the existing forklift mast to meet the special high-precision, high-stability, and noise-free operating environment.

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