Captive screw and assembling method thereof

Abstract

The invention discloses a captive screw and an assembling method of the captive screw. The captive screw comprises a screw head arranged on the top portion of the screw, threads arranged on the lower portion of the screw and a screw rod arranged between the screw head and the threads. A boss is arranged on the screw rod, an inclined face is arranged between the top portion of the boss and the bottom portion of the boss, the boss can penetrate through a collar to enable the collar to be located between the boss, and the screw head and the collar cannot be separated from the screw. The assembling method of the captive screw comprises the steps of first, providing a fixed seat, wherein the fixed seat is provided with a cavity and threaded holes are formed inside the cavity, second, placing the collar on the fixed seat, third, providing a fixed plate with a hole cavity and placing the fixed plate onto the fixed seat to press the collar, and fourth, screwing the screw inside to enable the screw and a combination piece to be fixed, and enable the collar and the fixed plate to be limited between the boss and the screw head. According to the captive screw and the assembling method of the captive screw, not only can the fixed seat and the fixed plate be fixed together, but also the screw cannot be separated from the fixed plate when the screw is pulled out, and therefore the screw can be prevented from being lost.

Description

technical field [0001] The invention relates to a screw which can be tied on a product and an assembly method thereof. Background technique [0002] A captive screw is a screw that is captive or held in a collar. A captive screw consists of a screw and a collar, the screw passing through a first part and screwing into a second part to hold the two parts together. When the two parts are released and disengaged, the screw remains only in the first part. [0003] The knife cover of the existing wood shredder is connected with the knife seat by combination screws, which has the following disadvantages: firstly, this kind of connection is easy to be removed; secondly, the screws are easy to lose, and the lost screws may cause some functions of the machine to fail, seriously affecting The stability and safety of the machine work. [0004] Although the captive screw of the prior art can also realize the effect of preventing the screw from loosening, it has many parts and many an...

AI Technical Summary

Problems solved by technology

[0003] The knife cover of the existing wood shredder is connected with the knife seat by combination screws, which has the following disadvantages: firstly, this kind of connection is easy to be removed; secondly, the screws are easy to lose, and the lost screws may cause some functions of the machine to fail, seriously affecting The stability and safety of machine work

[0004] Although the captive screws in the prior art can also prevent the screws from loosening, they have many parts and many and complicated assembly steps, so that the production efficiency and qualification rate cannot be improved.

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