Self-tapping and self-locking timber bolt pike

Abstract

The invention discloses a self-tapping and self-locking timber bolt pike which comprises a self-tapping drill, a bolt column and a bolt cap which are integrally connected with each other from bottom to top; the self-tapping drill comprises a conical core head and a plurality of arc cutting blades which are distributed on the outer side wall of the conical core head along the peripheral direction, and the cutting edge parts of the arc cutting blades are all arranged in the mode of facing the outside; the bolt column is a cylindrical rod, the middle lower part of the bolt column is a thread section, threads are formed on the outer side wall of the thread section and are spirally distributed on the outer side wall of the thread section, and the outer side wall of the upper part of the bolt column is a smooth side wall; the bottom of the thread section is connected with the top of the self-tapping drill, and the threads form a chip discharge passage which automatically discharges chips produced by the cutting of the self-tapping drill from bottom to top; and a chip guide groove is formed on the connection part of the bottom of the thread section and the top of the self-tapping drill. The timber bolt pike is simple in structure, convenient to process and manufacture and simple to use and operate, has the advantages of good use effect, convenience in construction, long bolt body, high connection strength and the like, and can realize functions of self-tapping, self-locking and automatic chip discharging.

Description

technical field [0001] The invention relates to a wood bolt, in particular to a self-tapping and self-locking wood bolt. Background technique [0002] Due to their unique aesthetic effects and construction techniques, wooden bridges and houses are in increasing demand. In the connection structure of wooden structures, bolts and screws are the most common and important connection parts. Dimensional building element connection requirements. In addition, during the actual use of existing bolts and screws, pre-drilling is required, and measurement and positioning calculations in the early stage are required, and the accuracy of drilling construction is very high; in addition, because bolts, screws, etc. The surface of the wooden structure is anchored, so it is easy to rust or affect the size of the components, which affects the architectural application of the wooden structure to a certain extent. Contents of the invention [0003] The technical problem to be solved by the ...

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