Looseness-prevention connecting structure with controllable pretightening force of engine cylinder head cover

Abstract

The invention relates to an anti-loose connection structure with controllable pretightening force of an engine cylinder head cover, comprising an engine and a cylinder head cover and a bolt assembly connecting the engine and the cylinder head cover, characterized in that: the bolt assembly includes bolts and springs, The bolt includes a screw body, the upper end of the screw body is provided with a nut, and the lower part of the nut is integrally provided with a pressure cap; the screw body is covered with a spring, and the lower end of the screw body passes through the cylinder head cover and the engine thread connected, the spring is in contact with the upper surface of the cylinder head cover. With the above technical solution, on the one hand, the elastic force of the spring is used to increase the contact pressure between the threads, and the friction between the threads is increased, which enhances the fastening effect; Tight force. It solves the problem that the bolts of the cylinder head cover are loose during the operation of the engine and the aluminum cylinder head cover is easily crushed under the excessive bolt pre-tightening force, and requires a simple structure and low cost.

Description

technical field [0001] The invention belongs to the technical field of connection of engine cylinder head covers, in particular to an anti-loosening connection structure with controllable pretightening force of engine cylinder head covers. Background technique [0002] At present, the installation of the existing engine cylinder head cover adopts simple bolt connection. On the one hand, due to the periodic and frequent vibration of the engine, the bolts of the engine cylinder cover are prone to loosening and falling off, resulting in damage to the sealing; A high bolt pre-tightening force will cause crushing damage to the aluminum cylinder head cover; therefore, a special device is required to control the pre-tightening force of the cylinder head cover bolts to avoid the above situation. The existing technical solution is to use the combination of bolts, flat washers and spring washers to prevent loosening, and use the torque method to control the pre-tightening force. In ad...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems existing in the known technology, the present invention provides a simple structure, convenient installation and use, which solves the loosening of the cylinder head cover bolts during the operation of the engine and the aluminum cylinder head cover is easy to produce under the excessive bolt pre-tightening force. The problem of crushing, and requires a simple structure, low-cost engine cylinder head cover pre-tightening force controllable anti-loosening connection structure

Images