Tensioning wheel with fully-sealed dust-proof structure

Abstract

The invention relates to a tensioning wheel with a fully-sealed dust-proof structure. The tensioning wheel with the fully-sealed dust-proof structure comprises a tensioning wheel (1), a wheel axle (2), a bearing (6), a dust cover (3), a bearing end cover (4) and a fixed mandrel (5), wherein an outer ring of the bearing (6) is in interference fit with an inner hole of the tensioning wheel (1); an inner ring of the bearing (6) is in interference fit with the wheel axle (2); an annular groove A (9) and an annular groove B (10) are sequentially formed in the other side of the inner hole of the tensioning wheel (1); an elastic collar (7) for the hole is embedded into the annular groove A (9); the dust cover (3) is mounted on one side of the tensioning wheel (1) in a matching way; the fixed mandrel (5) is connected with the wheel axle (2) through threads in a matching way from the other side of the tensioning wheel (1); the bearing end cover (4) sleeves the fixed mandrel (5); the bearing end cover (4) is propped against the side surface of the inner ring of the bearing (6). The tensioning wheel with the fully-sealed dust-proof structure has the advantages of being simple in structure, low in cost, stable in sealing performance and convenient in detachment and mounting.

Description

technical field [0001] The invention relates to a tension wheel, in particular to a tension wheel with a fully sealed and dustproof structure. Background technique [0002] The tensioner assembly is generally installed at the lower part of the front wheel train of the engine, and the working conditions are harsh. In order to prevent dust and mud from entering the product and causing bearing failure, it is often necessary to cover the internal structure of the pulley. The existing dustproof The cover is mostly made of plate blanking, punching, forming, and flanging, and then the dust cover is tightened by hexagonal flange bolts to achieve the purpose of dust prevention. However, the dust cover of this structure is relatively complicated and the cost is high. When the engine is working under harsh conditions such as dust and sand, it is difficult to disassemble and assemble the dust cover, and it is easy to cause the dustproof performance of the dust cover to fail, which is ob...

AI Technical Summary

Problems solved by technology

However, the dust cover of this structure is relatively complicated and the cost is high. When the engine is working under harsh conditions such as dust and sand, it is difficult to disassemble and assemble the dust cover, and it is easy to cause the dustproof performance of the dust cover to fail, which is obviously impossible. Meet the requirements of dustproof ability, so the application of fully sealed dustproof structure is imperative

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