A bolt combination mechanism that can be disassembled on one side

Abstract

The invention discloses an expansion bolt allowing disassembling and assembling on the single side. The expansion bolt comprises a bolt body, a wedge-shaped nut and at least two expansion arms, wherein positioning portions are arranged on the expansion arms, the bolt body penetrates between the expansion arms and is in threaded connection with a threaded hole of the wedge-shaped nut, and the wedge-shaped nut comprises wedge-shaped faces which are matched with the expansion arms. The expansion bolt has the advantages that the expansion bolt can be assembled on the single side and is convenient to assemble; connecting positions of the expansion arms and the positioning portions can be designed to be thin to facilitate deformation, no soft rubber material is required to be used, and the service life of the whole expansion bolt is prolonged; a pre-assembled part is matched with the expansion arms in a positioned mode, and the expansion arms are matched with the wedge-shaped nut, so that the rotation stopping effect is achieved during assembling; during disassembling, no component is left inside a base or the pre-assembled part, so that the expansion bolt can be used repeatedly, and the base is convenient to clean.

Description

technical field [0001] The invention relates to a bolt combination mechanism which can be disassembled on one side. Background technique [0002] When fixing an object on the base, usually the base has a mounting hole with an internal thread, just use a screw with an external thread to pass through the object and the mounting hole and screw the object through the screw connection between the internal thread and the external thread fixed on the base. [0003] If there is no internal thread in the mounting hole of the base, the connection method of bolts and nuts is generally adopted, that is, the nut is on the lower side or the inner side of the base, and the bolt is inserted into the mounting hole from the upper side of the base and is locked and connected with the nut. But with some bases, people can only access one side of the base, such as the ceramic seat head of a closed toilet, and the nut cannot be installed from under or inside the seat head, so the installation bec...

AI Technical Summary

Problems solved by technology

But for some bases, only one side of the base can be accessed, such as the ceramic seat head of a closed toilet, and the nut cannot be installed from under or inside the seat, so the installation becomes extremely difficult

In order to solve the above problems, a patent such as WO2006095504 appeared, which can also be installed on one side. However, in this method, the expansion tube has a large deformation, and only soft rubber such as rubber or silica gel can be used. Over time, it is easy to age and the fastening force will decrease.

Or, as described in the EP1177756B1 patent document, although it does not use soft rubber, it has no anti-rotation function and is difficult to disassemble

Or, as described in the Chinese CN101825130 patent document, it adopts a circular expansion sleeve, which is fixed by an interference fit with the base fixing hole. When dismounting, the expansion sleeve and the tapered nut stay in the mounting hole and cannot disassembled, inconvenient to use

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