Static connection structure of keys

Abstract

The invention discloses a static connection structure of keys. The static connection structure of the keys comprises a containing part and a contained part embedded into the containing part; at least two key grooves distributed in the circumferential direction in a spaced mode are formed in the contact face of the containing part and the contained part; and one of the key grooves is matched with a flat key, and the other key is matched with a tangential key. The connection structure accurately positions the containing part and the contained part through the advantages of good centering, high positioning precision, and good impact and vibration resistance of the flat key, and achieves torque transmission between the containing part and the contained part through the characteristic of good torque transmission performance of the tangential key, so that stable connection between the containing part and the contained part is achieved through cooperation of the two keys, and the phenomenon that the containing part and the contained part are likely to loosen due to impact, vibration or heavy loads is avoided; meanwhile, the tangential key can be subjected to match grinding so as to compensate for errors caused during manufacturing and assembling and deformation generated during using, so that the purposes of reducing the processing difficulty, bringing convenience to assembly and maintenance and reducing the processing and maintenance cost are achieved.

Description

technical field [0001] The invention relates to the technical field of mechanical connection structures, in particular to a static connection structure of keys. Background technique [0002] The static connection between the hollow containing part and the contained part is a very common mechanical connection structure, mainly including two kinds of non-media connection and media connection. [0003] The media-free connection is an interference fit connection, that is, by controlling the size of the containing part and the contained part, the two are connected by means of the elastic deformation of the material, and the friction between the containing part and the contained part is used to achieve Torque transmission. When two parts are connected by this connection method, it is difficult to disassemble and install. Even when the size of the parts is large, it is necessary to use large special tools to achieve it; [0004] The medium connection is to fix the containing part ...

AI Technical Summary

Problems solved by technology

[0004] The medium connection is to fix the containing part and the contained part axially and transmit the torque through the medium arranged between the containing part and the contained part. The medium connection generally includes the following connection methods, one of which is torque transmission Pin connection, this connection method needs to drill reaming pin holes after the containing part and the contained part are aligned, and often needs to open multiple pin holes evenly distributed along the circumferential direction on the contact surface of the containing part and the contained part. The difficulty and processing cost are high, and there are certain requirements for the quality of the operator, the performance of the machine tool and the processing range. In addition, when the above structure is put into use, once the containing part and the contained part are slightly deformed, it will cause The twist pin cannot be dismantled smoothly, so violent demolition can only be used, which will not only damage the twist pin, but also may cause damage to important parts, and the pin hole needs to be reprocessed and adjusted, resulting in a long maintenance cycle and high maintenance costs. It is difficult to maintain repeatedly; the second is the double flat key connection, which requires two key grooves to be arranged symmetrically at 180° intervals in the circumferential direction of the containing part and the contained part. The processing symmetry is high and difficult, and errors are prone to occur, resulting in failure to assemble; The third is the double tangential key connection, the centering of the double tangential key is not good, it is easy to cause the eccentricity of the containing part and the contained part, and it is easy to loosen under the condition of shock, vibration or heavy load

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