Three-segment type linear actuator and driving assembly thereof

Abstract

The invention relates to a three-segment type linear actuator and a driving assembly thereof. The three-segment type linear actuator comprises a driving assembly and a three-segment type lifting tubular column, wherein a hollow screw rod and a driving tube of the driving assembly are sleeved on the outside of an inner screw rod, an outer tube is sleeved on the outside of the driving pipe, a hollow screw rod nut is sleeved on the hollow screw rod, an inner screw rod nut is sleeved on the inner screw rod, the hollow screw rod nut and a fixed seat are fixed at two ends of the outer tube, the hollow screw rod and the driving tube rotate synchronously, the inner screw rod nut is rotatably arranged in the fixed seat, and the inner screw rod nut is fixedly connected with the lower end of the driving tube. The bottom of the fixed seat of the driving assembly is fixed on a first end plate at the lower end of the middle tubular column, and the fixed seat can partially or totally enter an inner tubular column. The three-segment type linear actuator and the driving assembly thereof have the following benefits: the driving assembly becomes an independent assembled module and is compact in structure and strong in adaptability; and meanwhile, the actuator saves the axial space among the three segments of lifting tubular columns as far as possible and can provide a large height adjusting scope.

Description

technical field [0001] The invention relates to the technical field of linear actuators, in particular to a three-section linear actuator and its driving assembly. Background technique [0002] In a modern office environment, out of consideration for health and comfort, desks, computer desks, conference tables, etc. are required to have a lifting function. Office staff can adjust the height of the desktop according to their height and sitting posture to improve comfort, or directly Working standing up helps relieve neck and waist fatigue and strain. In the pattern of global trade, this kind of lift desk must not only have excellent handling and operation performance, but also set the height adjustment range according to the difference in height of people in different regions. According to the ANSI / BIFMA standard, the height adjustment range from the desktop to the ground is 22.6”-48.7” (574mm~1237mm). In order to meet this requirement, the general linear actuator must be r...

AI Technical Summary

Problems solved by technology

However, the connection structure between the drive assembly of the existing three-section linear actuator and the three-section lifting column needs to occupy more dimensions in the lifting direction, which affects the limited height adjustment range of the actuator. On the premise of ensuring rigidity, In order to meet the needs of height adjustment ranges in different regions, two different specifications, low and high, need to be designed, which complicates the management of the entire industrial chain from processing and manufacturing to sales and service

[0004] Moreover, the structural design of the existing three-section linear actuator drive assembly has certain limitations. In order to adapt to different shapes of three-section lifting columns or non-standard lifting mechanisms customized by customers, it is necessary to match the corresponding structure of the drive assembly, which has poor versatility.

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