Slotted push rod device adopting plastic nut and processing method of slotted push rod device

Abstract

The invention relates to a slotted push rod device adopting a plastic nut. The slotted push rod device comprises an input shaft, an upper shell, a lower shell, a transmission device, a lead screw, the plastic nut and a metal pipe. The plastic nut is a slotted plastic nut, a circumferential annular groove or a spiral groove is formed in the inner wall face or the outer wall face of the plastic nut. The remaining thickness H of the wall thickness between the groove bottom and the small diameter of the external thread of the plastic nut is smaller than or equal to 4.0 mm, or the remaining thickness I of the wall thickness between the groove bottom and the large diameter of the internal thread of the plastic nut is smaller than or equal to 3.0 mm. The slotted plastic nut has good self-lubricating performance, does not need to be added with oil frequently, and cannot be axially expanded in a severe temperature environment with a large temperature difference and under the condition of bearing a large load. The device is especially suitable for solar power generation sun-tracking support push rod devices and special environments and occasions such as scientific experiments, polar region investigation, deep sea detection and deserts. The invention further relates to a production method of the slotted push rod device adopting the plastic nut.

Description

technical field [0001] The invention belongs to the technical field of push rod devices, and in particular relates to a slotted push rod device using plastic nuts and a processing method thereof, in particular to a push rod device and a processing method suitable for solar power generation solar 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 generatio...

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

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