Sun gear axial fixed structure

Abstract

The invention discloses a sun wheel axial fixing structure, in particular to an axial fixing structure of a sun gear at the former stage and a big gear at the later stage or a planet carrier, wherein the big gear is connected onto a sun gear shaft in transmission mode, and a bearing is arranged on a big gear shaft. The sun wheel axial fixing structure is mainly characterized in that outer threads are directly processed on the sun gear shaft and the big gear shaft, the nominal diameter is increased, the dangerous section area of the threads is increased, and connection strength and impact resistance of thread pairs are greatly improved. Simultaneously, a positioning ring used for positioning embedding is arranged on the sun gear shaft and is connected onto the sun gear shaft and the big gear shaft in locking mode through inner locking nuts and outer locking nuts. A single nut screwing and fixing mode is adopted so that loading sharing is avoided, force moment control is not needed, and the sun wheel axial fixing structure is convenient to install, low in assembling cost and very reliable in looseness prevention. In addition, the inner locking nuts and the outer locking nuts can be repeatedly used without reducing the connection strength and reliability, and therefore later stage maintenance cost is low.

Description

technical field [0001] The invention relates to an axially fixed structure in a mechanical transmission device, in particular to an axially fixed structure suitable for a sun gear in a planetary gear box. Background technique [0002] In planetary gearboxes such as wind power gearboxes, splines are often used as transmission connections between the sun gear of the previous stage and the large gear or planetary carrier of the latter stage. This connection structure has high load-bearing capacity and good floating effect, so it has been obtained Wider range of applications. However, the problem of the axial positioning of the sun gear has always hindered the further promotion of this structure. Due to the continuous swing of the sun gear during operation, the axial positioning structure of the sun gear is often subjected to frequently changing impact loads, while the traditional axial positioning of the sun gear The positioning structure is a combination of pressure plates an...

AI Technical Summary

Problems solved by technology

However, the problem of the axial positioning of the sun gear has always hindered the further promotion of this structure. Due to the continuous swing of the sun gear during operation, the axial positioning structure of the sun gear is often subjected to frequently changing impact loads, while the traditional axial positioning of the sun gear The positioning structure is a combination of pressure plates and bolts. This axial fixed structure has poor reliability and often fails, even causing damage to the entire gearbox.

Images