Ball screw type electric cylinder

Abstract

The invention relates to a ball screw type electric cylinder of which a transmission element is a ball screw pair. The ball screw type electric cylinder comprises a power transmission box, a rectangular rod transmission shaft, a hollow ball screw, a sleeve nut and an outer sliding sleeve, wherein the power transmission box is provided with a power device and a transmission device; the rectangular rod transmission shaft is vertically arranged on the power transmission box; the hollow ball screw, the sleeve nut and the outer sliding sleeve sequentially coaxially sleeve the transmission shaft from inside to outside; the transmission shaft and the ball screw can slide relative to each other; the sleeve nut and the ball screw form the ball screw pair; the upper end of the inner pore wall of the outer sliding sleeve is connected to the upper end of the outer wall of the ball screw through a supporting bearing; the ball screw can be rotated relative to the outer sliding sleeve; the outer sliding sleeve and the sleeve nut can up and down linearly slide through guide keys; and an upper top plate is mounted on the top part of the outer sliding sleeve. When in work, the power device is capable of driving the transmission shaft to rotate through a transmission device; the transmission shaft in rotating drives the ball screw to rotate; and the ball screw in rotating drives the outer sliding sleeve to up and down move, and thus the function of lifting up and down working load is achieved.

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 ball screw electric cylinder using a ball screw pair as a transmission element. Background technique [0002] At present, in the lifting equipment work place, according to the needs, the objects to be lifted are often lifted to different heights for work. 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 environmental conditions; the existing Although the trape...

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, it has low efficiency, high energy consumption, large clearance, and poor positioning accuracy.

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

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