Cover pullout mechanism

Abstract

The invention discloses a pull-out mechanism, which comprises a support base with a U-shaped groove at the bottom, a through hole and an abdication hole at the upper end of the support base, a pull-out rod penetrates through the through hole and is placed in the U-shaped groove, and when pulled out The middle part of the rod is covered with a connecting cylinder, and an external thread is provided on the outer wall of the pulling rod, and the external thread is matched with the thread on the upper part of the inner wall of the connecting cylinder. There are two arc-shaped depressions arranged symmetrically along the center of the circle, and the outer diameter of the clamping plate is larger than the outer diameter of the pull-out rod; the screw nut is threadedly matched with the connecting cylinder, the diameter of the abdication hole is larger than the outer diameter of the connecting cylinder, and the connecting cylinder is abdicated along the edge The inner wall of the hole slides until the connecting cylinder is completely moved out of the U-shaped groove. The invention can realize the detachment and connection between various parts, and for various types of bearings, the extraction rod can still accurately contact the inner wall of the oil seal through the withdrawal groove, which improves the applicability of the invention.

Description

technical field [0001] The invention relates to an LL type oil seal, in particular to a cover pulling mechanism. Background technique [0002] The LL type oil seal is used for the sealing of the 353130B compact bearing, which can achieve the purpose of making the short shaft of the 353130B compact bearing less prone to bending and increasing the service life. Abrasive particles invade the bearing, which also makes the bearing have good sealing performance and improves the service life of the grease in the bearing. [0003] However, during the long-term operation of the locomotive, in order to ensure the stable operation of the locomotive, it is necessary to detect and replace the LL-type oil seal in time and regularly. During the replacement process of the LL-type oil seal, the temporarily sealed oil seal unloading groove is usually opened. Then use tools such as pliers to pull the oil seal out of the bearing. Since the press-fitting of the LL-type oil seal is realized thro...

AI Technical Summary

Problems solved by technology

[0003] However, during the long-term operation of the locomotive, in order to ensure the stable operation of the locomotive, it is necessary to detect and replace the LL-type oil seal in time and regularly. During the replacement process of the LL-type oil seal, the temporarily sealed oil seal unloading groove is usually opened. Then use tools such as pliers to pull the oil seal out of the bearing. Since the press-fitting of the LL-type oil seal is realized through a hydraulic press-fitting mold, the oil seal is tightly attached to the bearing. Manual operation requires a large amount of labor and increases the workload of the workers. , and the efficiency is low; another solution is to use large-scale precise automatic extraction equipment, but this method is expensive and unacceptable to ordinary enterprises

Images