Linear transmission assembly and lifting table leg with application of linear transmission assembly

Abstract

The invention discloses a linear transmission assembly and a lifting table leg with application of the linear transmission assembly. The linear transmission assembly comprises a transmission tube, a first screw tube, a second screw tube and a lead screw, wherein the first screw tube can be synchronously rotated with the transmission tube, the first screw tube and the transmission tube can generatedisplacement through relative sliding in an axial direction, and a first transmission nut is in threaded connection to the first screw tube; the second screw tube can be synchronously rotated with the first screw tube, the second screw tube and the first screw tube can generate displacement by relative sliding, a second transmission nut is in threaded connection to the second screw tube, and a first connecting base is connected to the second transmission nut; the lead screw is fixedly disposed in the second screw tube, and the outer side wall of the lead screw is in clearance fitting with theinner wall of the second screw tube; a third transmission nut is in threaded connection to the lead screw, and the third transmission nut is connected to the second screw tube; and a second connecting base sleeves the third transmission nut, and the third transmission nut and the second connecting base are connected in a rotatable manner and limited axially. The linear transmission assembly and the lifting table leg with application of the linear transmission assembly can increase a stroke of a lifting upright.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission devices, in particular to a linear transmission assembly and a lifting table leg for its application. Background technique [0002] Lifting table legs are widely used in intelligent office equipment such as electric lifting tables and electric lifting platforms, as well as in fields such as medical equipment. pipe, middle pipe and outer pipe, the upper end of the inner pipe is connected with the casing of the driving mechanism, and the lower end of the outer pipe is in contact with the ground; the inner pipe is provided with a linear transmission assembly, and the linear transmission assembly includes a square support tube, the inner hole at the upper end of the support tube is connected with a first base, and the center hole of the first base is threaded with a lead screw, and the first base and the support tube move along the The screw moves along the length direction; the suppo...

AI Technical Summary

Problems solved by technology

[0002] Lifting table legs are widely used in intelligent office equipment such as electric lifting tables and electric lifting platforms, as well as in fields such as medical equipment. pipe, middle pipe and outer pipe, the upper end of the inner pipe is connected with the casing of the driving mechanism, and the lower end of the outer pipe is in contact with the ground; the inner pipe is provided with a linear transmission assembly, and the linear transmission assembly includes a square support tube, the inner hole at the upper end of the support tube is connected with a first base, and the center hole of the first base is threaded with a lead screw, and the first base and the support tube move along the The screw moves along the length direction; the support tube slides with a set of square tubes arranged on the screw, the lower end of the square tube is connected with the lower end of the outer tube through a connecting plate, and the inner hole of the square tube is connected with a second base seat, and the inner thread of the center hole of the second base is connected with a threaded tube sleeved on the lead screw, the threaded tube and the lead screw rotate synchronously, and the thread tube can slide relative to the lead screw; the driving mechanism drives the lead screw to rotate , so that the support tube and the first base move along the axial direction of the screw, and at the same time, the rotation of the wire tube makes the square tube and the second base move along the length direction of the support tube to realize the expansion of the inner and outer tubes of the lifting table legs. contraction; in order to maximize the stroke of the lifting table leg, the linear transmission assembly adopts the cooperation of two pipes, that is, the mutual fitting and relative movement of the support pipe and the square pipe are realized; but the linear transmission assembly It is still far from satisfying the demand for maximizing the stroke of the lifting table legs. Therefore, how to provide a linear transmission assembly that can maximize the stroke of the lifting table legs is a technical problem that needs to be solved urgently.

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