Bearing oil seal drawing structure

Abstract

The invention discloses a bearing oil seal drawing structure, which includes 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, and a pull-out rod penetrates through the through hole and is placed in the U-shaped groove. And the middle part of the extraction rod is provided with a hollow adjustment cylinder, the adjustment cylinder is in contact with the inner wall of the through hole, an external thread is also provided on the outer wall of the extraction rod, and the external thread is threaded with the upper section of the inner wall of the adjustment cylinder, The end of the pull-out rod is installed with a snap-in disc, the outer diameter of which is larger than the outer diameter of the pull-out rod; it also includes a screw nut, and the screw nut is threadedly matched with the adjusting cylinder. The invention can realize the disassembly and connection between the components, which is convenient for manual use, and for various types of bearings, the position of the pullout rod can be adjusted, even if the distance between the oil seal side wall of each bearing and the bottom of the U-shaped groove Differently, the extraction rod can still accurately contact the inner wall of the oil seal through the withdrawal groove, which improves the applicability of the present invention.

Description

technical field [0001] The invention relates to an LL type oil seal, in particular to a bearing oil seal drawing structure. 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 re...

AI Technical Summary

Problems solved by technology

Aiming at the low efficiency and heavy workload of manually pulling out the oil seal in the prior art, the present invention designs a tool that can simplify the manual operation so as to improve the pulling out efficiency; Cut out the unloading groove, then place the U-shaped groove of the supporting base on the end face of the bearing, and move the pull-out rod in the hollow adjustment cylinder according to the distance between the unloading groove and the bottom of the U-shaped groove, so that the pull-out rod The clamping disc at the end directly contacts the inner wall of the oil seal through the withdrawal groove, and then the pull-out rod is fixed in the adjusting cylinder through the thread fit between the external thread and the inner wall of the adjusting cylinder, and then the manual use of a wrench or other pneumatic equipment is used to start the adjustment. The screw nut on the adjustment cylinder rotates, so that the adjustment cylinder and the pull-out rod move upwards in the through hole until the oil seal is completely pulled out; the overall structure of the invention is compact, and the disassembly and connection between the components can be realized, which is convenient for manual use , and for different types of bearings, the position of the pull-out rod can be adjusted. Even if the distance between the side wall of the oil seal of each bearing and the bottom of the U-shaped groove is different, the pull-out rod can still accurately pass through the withdrawal groove and the oil seal. contact with the inner wall of the inner wall, which greatly improves the applicability of the present invention; the abdication hole connected with the through hole meets the requirements, and the diameter of the abdication hole is larger than the outer diameter of the adjustment cylinder. When the oil seal is completely pulled out, the adjustment cylinder slides along the inner wall of the abdication hole until The adjustment cylinder is completely moved out of the U-shaped groove to complete the separation of the support base from the adjustment cylinder and the pull-out rod, which is convenient for storage

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