One-way driving linear actuator

Abstract

The invention discloses a one-way driving linear actuator, and belongs to the technical field of linear transmission. The one-way driving linear actuator comprises a driving motor, a transmission assembly, a rotating lead screw, a transmission nut, an inner pipe and an outer pipe, wherein the driving motor drives the rotating lead screw to rotate through the transmission assembly, the rotating lead screw rotates to drive the transmission nut to move in the axial direction of the rotating lead screw, the transmission nut drives the inner pipe to move relative to the outer pipe, a connecting sleeve is arranged on the transmission nut, the connecting sleeve and the transmission nut are axially fixed, the connecting sleeve is separated from the inner pipe, and when the rotating lead screw rotates in the forward direction, and the end of the connecting sleeve is abutted against the end of the inner pipe so as to drive the inner pipe to stretch out relative to the outer pipe. The linear actuator has the advantages that the linear actuator only has one-way pushing, and has the good safety, and meanwhile, the structure is relatively simple, and the more cost is saved.

Description

【Technical field】 [0001] The invention relates to a linear actuator driven in one direction, belonging to the technical field of linear transmission. 【Background technique】 [0002] Linear actuators, also known as electric push rods, are widely used in furniture, medical equipment, solar power generation, etc. The main structure includes a drive motor, a drive worm, a worm wheel, a screw, and a nut. The working principle is that the drive motor drives the drive worm Rotation, the transmission worm meshes with the worm wheel to drive the worm wheel to rotate, the worm wheel to drive the screw to rotate, the screw to rotate to drive the nut to move axially, the nut is generally connected to the inner tube, so as to realize the telescopic movement of the inner tube. [0003] The traditional linear actuator is driven by the drive motor for extension and retraction. However, this drive method makes the drive motor reverse and drive the inner tube to retract. It will not stop when...

AI Technical Summary

Problems solved by technology

[0003] The traditional linear actuator is driven by the drive motor for extension and retraction, but this drive method makes the drive motor reverse and drive the inner tube to retract, and it will not stop when it encounters foreign objects, which is easy to cause damage or Human body damage, especially for curious children, who like to touch and explore with their hands, are easy to be pinched, with high risk and low safety performance

Therefore, it is also necessary to develop this kind of anti-pinch linear actuator, so linear actuators that can only drive in one direction have begun to appear on the market, but this type of linear actuator usually has a more complicated structure.

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