Bolt component with anti-falling structure and integrated cover using bolt component

Abstract

The invention discloses a bolt component with an anti-falling structure and an integrated cover using the bolt component. The technical scheme is that the bolt component with the anti-falling structure comprises a bolt and a shaft sleeve, wherein the bolt comprises a head part and a screw part; the head part is of a hexagonal head structure and is provided with a flange surface; the diameter of the flange surface is greater than the diameter of the inner hole of the shaft sleeve; the upper part of the screw part is a polished rod; a step is formed at the lower end of the polished rod; the diameter of the step is slightly greater than the diameter of the polished rod; the lower part of the screw part is a threaded part; the shaft sleeve is I-shaped; flanges are respectively formed at the upper end and the lower end of the shaft sleeve; the diameter of the inner hole of the shaft sleeve is greater than the outside diameter of the step; the middle part of the shaft sleeve is a necking part. The bolt component with the anti-falling structure has the beneficial effects that an anti-falling effect is achieved by the structure; additional pieces are not required to be added; the bolt component with the anti-falling structure is simple in structure, easy to realize and high in reliability.

Description

technical field [0001] The invention relates to a bolt assembly with an anti-off structure and a rocker cover using the bolt assembly. Background technique [0002] The sealing and lubrication of the related parts of the engine valve mechanism, such as rocker arm, valve bridge, valve, spring seat, etc., play an important role in the long-lasting and good operation of the engine, so the upper part of the engine needs a rocker cover to seal with a certain pressure motor oil. For multi-cylinder machines, if one cover per cylinder is adopted, the sealing surface will undoubtedly be increased, thereby increasing the possibility of oil leakage. Therefore, the integral cover can greatly reduce the sealing surface to be sealed. [0003] However, the overall cover has higher requirements on the precision and flatness of the contact surface. If a cover made of metal material is used, the precision of the contact surface can be met through processing, but the engine cover does not r...

AI Technical Summary

Problems solved by technology

[0003] However, the overall cover has higher requirements on the precision and flatness of the contact surface. If the cover of metal material is used, the precision of the contact surface can be met through processing, but the engine cover does not require high mechanical strength, and the metal material undoubtedly increases The cost and weight of the engine; at the same time, the noise and vibration generated by the valve mechanism of the engine are relatively large. If the direct contact between the cover and the body is used, in addition to being unable to effectively isolate the noise of the valve mechanism, the noise and vibration generated by the cover itself are also very large. Large, which greatly reduces the comfort of the engine and the whole machine, and cannot meet the noise requirements of the regulations; for the integral cover assembly made of plastic materials, it is generally composed of shells, gaskets, bolts, etc., because of its rigidity and stability Poor, before being assembled into the engine, it needs to be sub-packaged by the supplier and placed on a special inspection tool for airtightness inspection. If all parts are scattered after passing the airtightness inspection, they need to be re-assembled on the assembly line. Increases the possibility of oil leaks and also increases assembly time

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