Split slot type push rod device adopting plastic nut

Abstract

The invention relates to a split groove type push rod device adopting a plastic nut, the plastic nut is of a split groove type plastic nut structure, and at least one pair or n pairs of inner peripheral ring grooves and paired outer peripheral ring grooves with the same axial position or mutually offset axial positions are oppositely formed in the inner wall surface or the outer wall surface at the same time; the length of each inner peripheral wall annular section formed by slotting and slitting and the length of each outer peripheral wall annular section formed by slotting and slitting are both smaller than or equal to 80 mm; the groove width of each inner circumferential ring groove and the groove width of each outer circumferential ring groove are both larger than 0.05 mm. The radial wall thickness or the radial distance gamma between the groove bottoms of the inner circumferential ring groove and the outer circumferential ring groove of each pair of open grooves is less than or equal to 3.0 mm; the total length of the plastic nut ranges from 50 mm to 200 mm. The self-lubricating device has good self-lubricating performance, does not need to be added with oil frequently, can not expand axially under the conditions of severe temperature environment with large temperature difference and bearing large load, and is particularly suitable for a solar power generation sun-tracking support push rod device and severe environment.

Description

technical field [0001] The invention belongs to the technical field of push rod devices, in particular to a split-slot push rod device using plastic nuts, in particular to a push rod device suitable for solar power generation tracking brackets. Background technique [0002] The technology of using solar power generation devices to generate electricity is becoming more and more common around the world. In order to maximize the utilization of solar energy by solar power generation devices, the existing technology uses solar tracking brackets to realize solar sails in solar power generation devices. The plate follows the different spatial angle positions of the sun for real-time adjustment of the lifting and / or angle, while the lifting and / or angle adjustment functions of the solar tracking bracket are all realized by using a push rod device. Due to the harsh outdoor environment used by solar power generation devices, it usually needs to withstand the ambient temperature of -30...

AI Technical Summary

Problems solved by technology

However, the disadvantage of copper nuts is that copper nuts have poor self-lubricating ability when used in severe temperature environments with large temperature changes. Under a dynamic load of 1 ton, taking the lifting distance of copper nuts as an example, the number of lifting times is less than 150 times. It is necessary to add lubricating grease frequently to ensure the smooth movement of it and the screw during the screw transmission process.

However, plastic nuts have the following disadvantages: the plastic material has poor strength and cannot bear large static loads and dynamic loads. If the length of a single nut is increased to withstand high static loads and dynamic loads, it can be used in harsh environments with large temperature changes. When used under high conditions, axial expansion will occur due to the large linear expansion coefficient of the plastic material

Images