Pull rod of shaft sleeve based on interference fit and assembly method thereof

Abstract

The invention discloses a pull rod of a shaft sleeve based on interference fit and an assembly method thereof and relates to the technical field of mechanical assembly. The pull rod comprises a screw, wherein a first nut, a sleeve, a guiding column, a blocking cover and a loop rod are sequentially matched from one end to the other end of the screw. An inner hexagonal sleeve head is arranged at one end of the loop rod, a second nut is arranged at the other end of the loop rod, a plugging plate is arranged on one end face of the sleeve, and a first through hole in clearance fit with the screw is formed in the center of the plugging plate. A first guiding column is arranged on one end face of the guiding column, and the guiding column is provided with a second through hole in clearance fit with the screw in the axial direction and is in sliding fit with the sleeve. A second guiding column is arranged on one end face of the blocking cover, is provided with a third through hole in clearance fit with the screw in the axial direction, and the second guiding column and the first guiding column are in sliding fit with the shaft sleeve. The shaft sleeve is arranged in a hole in a rotary matched mode through interference fit between the shaft sleeve and a hole for a part to be assembled based on the blocking cover, the screw and the sleeve and mechanical extrusion, and the pull rod is convenient to operate, simple in structure and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of mechanical assembly, and in particular relates to a pull rod based on an interference-fit shaft sleeve and an assembly method thereof, which are specifically used for the interference fit between the shaft sleeve and the hole. Background technique [0002] The shaft sleeve is a cylindrical mechanical part that is sleeved on the rotating shaft and is an integral part of the sliding bearing. Generally speaking, the shaft sleeve and the bearing seat adopt an interference fit, while the shaft sleeve adopts a clearance fit. During the long-term operation of the shaft sleeve, the journal surface is subjected to the extrusion force of the expansion sleeve and the combined mechanical force, which will cause its permanent deformation, and the diameter may be reduced by 0.1mm to 0.3mm. In turn, the mechanical expansion and tightening force cannot reach the required tightening force, and a fit gap appears between t...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a pull rod based on an interference fit shaft sleeve and its assembly method. The interference fit between the shaft sleeve and the hole of the component to be assembled is realized through the three parts of the cover, the screw, and the sleeve, and the mechanical extrusion The shaft sleeve is transferred to the hole, which solves the problem of the existing interference fit between the shaft sleeve and the hole.

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