Combined oil seal structure

Abstract

The invention provides a combined oil seal structure, and relates to the technical field of oil seals. The combined oil seal structure is characterized in that a sealing mechanism is arranged in a rubber body, and comprises a supporting framework, the interior of the rubber body is of a cavity structure, and the bottom of the supporting framework adheres to the inner surface wall of one side of the rubber body. According to the invention, when the oil seal is used, the restoring force generated by the deformation of the rubber ring firstly applies pressure to the sealing rubber, the sealing rubber continuously applies pressure to the output shaft to realize sealing work, and the restoring force generated by the deformation of the extension spring continuously applies pressure to the protection rubber so as to make the annular framework apply pressure to the sealing rubber to deform the sealing rubber, so that the sealing rubber is subjected to the pressure applied to the output shaft again; and in the whole use process, deformation is generated by applying pressure to the sealing rubber twice, so that the sealing effect of the oil seal structure is greatly improved.

Description

technical field [0001] The invention relates to the technical field of oil seals, in particular to a combined oil seal structure. Background technique [0002] The oil seal is a mechanical component used to seal oil. It isolates the parts that need to be lubricated from the output parts in the transmission parts, so that the lubricating oil will not leak. The seals used for static seals and dynamic seals (general reciprocating motion) are called seals. Oil seals The most representative form is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber. Generally speaking, the oil seal often refers to this TC skeleton oil seal. [0003] However, when the traditional oil seal is in use, the skeleton oil seal mostly only fits the oil seal body to the shaft through the spring ring. After a long time of use, the pressure force between the oil seal body and the shaft tends to become smaller due to the elastic force of the spring and wear ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when the traditional oil seals in the prior art are in use, most of the skeleton oil seals only use spring coils to make the oil seal body fit on the rotating shaft. The pressing force between the body and the rotating shaft is easy to decrease, which will cause leakage between the skeleton oil seal and the rotating shaft seal, and a combined oil seal structure is proposed.

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