Improved self-pretightening rotary shaft assembly

Abstract

The invention discloses an improved self-pretightening rotary shaft assembly. The improved self-pretightening rotary shaft assembly comprises a first supporting base, a spring, a sound removal pipe, asupporting base limiting cover, a fixed shaft, an aluminum pipe, a second supporting base and a locating pin, wherein it is required that the inner diameter of the spring is in interface fit with supporting pillars of the first supporting base and the supporting base limiting cover, and it is prevented that the friction in the running process of the improved self-pretightening rotary shaft assembly causes abnormal sounds. By means of the improved self-pretightening rotary shaft assembly, by controlling the thickness and the material rigidity of the sound removal pipe, bumping is buffered to the greatest extent, and the noise decibel value is reduced. In the whole assembly procedure, except riveting anti-backing riveting points which need tool clamps, other assembly procedures all can be manually completed. The improved self-pretightening rotary shaft assembly is simple in structure, has few parts, and is simple in assembly technology, and the production efficiency is improved by 100%or above.

Description

technical field [0001] The invention relates to a rotating shaft assembly, in particular to an improved self-pretensioning rotating shaft assembly suitable for various curtain rotating shafts (such as sunshades for sunroofs of automobiles, sunshades for automobiles, sunshades for family windows, etc.). Background technique [0002] The structure of the current energy storage shaft assembly is roughly the same as the energy storage structure disclosed in the background technology of Chinese Patent No. ZL201621156508.1 (authorized announcement date: 2017.05.24). However, the following problems were found in the actual production process of this kind of energy storage mechanism: ①The plastic parts at both ends of the mechanism are assembled with the springs. During the operation of the rotating shaft, the plastic parts and the springs sometimes contact and sometimes do not contact, resulting in friction and interference noises sound; the oiling process cannot 100% avoid this fa...

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Problems solved by technology

However, the following problems were found in the actual production process of this kind of energy storage mechanism: ①The plastic parts at both ends of the mechanism are assembled with the springs. During the operation of the rotating shaft, the plastic parts and the springs sometimes contact and sometimes do not contact, resulting in friction and interference noises sound; the oiling process cannot 100% avoid this failure; ②The spring and the aluminum tube are separated by a buffer sleeve, but the thickness of the buffer sleeve is limited (0.5mm thick), which cannot completely absorb the impact and bump between the two; resulting in When the vehicle is on a bumpy road, the shaft assembly makes impact and knocking noises; ③The existing structural parts are many, the assembly process is complicated, and the production efficiency is low

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