A 4-stage ball screw electric cylinder

Abstract

A four-stage ball screw electric cylinder, including a power transmission box equipped with a power device and a transmission device, a three-stage transmission shaft arranged vertically and coaxially on the power transmission box sequentially from the inside to the outside, and a four-stage ball screw ( Nuts), a pair of sleeve ball nuts and four-stage sliding sleeves, the first-stage drive shaft and the fourth-stage ball screw nuts can slide each other, and a group of ball screws (nuts) at all levels are respectively formed Vice, the ball screw (nut) of each level is also connected with the corresponding sliding sleeve of the first level through the support bearing. The solid cover is equipped with an upper top plate. When working, the power device drives the first-stage transmission shaft to rotate through the transmission device, and then drives each ball screw (nut), sleeve ball nut and four-stage sliding sleeve to work, thereby realizing the function of lifting and dropping the working load.

Description

technical field [0001] The invention belongs to the technical field of electric lifting mechanisms, and relates to a lifting mechanism mainly used in field lifting operations, in particular to a 4-stage ball screw electric cylinder using a ball screw pair as a transmission element. Background technique [0002] At present, in industrial places such as lifting detection and tracking equipment, it is often necessary to lift objects to be lifted to different heights for work according to needs. In the traditional lifting technology, hydraulic lifting equipment, pneumatic lifting equipment and trapezoidal electric cylinder are generally used to drive the lifting equipment. Hydraulic lifting equipment and pneumatic lifting equipment need to be equipped with hydraulic systems and compressors, which have disadvantages such as large equipment structure, heavy weight, small bearing capacity, difficult self-locking, inaccurate transmission, and restrictions on use by many environmenta...

AI Technical Summary

Problems solved by technology

Hydraulic lifting equipment and pneumatic lifting equipment need to be equipped with hydraulic systems and compressors, which have disadvantages such as large equipment structure, heavy weight, small bearing capacity, difficult self-locking, inaccurate transmission, and restrictions on use by many environmental conditions; the existing Although the trapezoidal electric cylinder lifting equipment has good self-locking performance, its structure is complicated. Both the rotating bearing and the screw nut must bear the load. The structure is not well stressed, the efficiency is very low, the reliability is not high, and the positioning accuracy is also poor.

In addition, the existing trapezoidal electric cylinder lifting equipment adopts a lifting structure with a small upper part and a larger lower part, that is, the sliding sleeve as the lifting component is arranged inside the outer sleeve as the supporting component, and the protruding part on the upper part decreases step by step. This structure is easy to accumulate dust and leak water between the joints of the lifting components, and the rainproof and dustproof effect is poor, so it is not suitable for use in open air and field workplaces

Images