Automatic assembling machine of expansion screw bolts

Abstract

The invention relates to an automatic assembling machine of expansion screw bolts and belongs to the field of hardware machinery. The assembling machine consists of a chain plate type conveying device, a part feeding device, a part escapement device, a screw nut screwing device, a screw rod small head lateral positioning device, a machine frame and a control system, wherein the part feeding device and the part escapement device are used for the ranging, the storage for package and the one-by-one release of parts, the chain plate type conveying device is arranged on the machine frame, semi-finished products and finished products with different stations are transferred through expansion screw bolt seat combination elements arranged on a chain plate, the screw rod small head lateral positioning device is arranged at the front end of the part escapement device for realizing the lateral positioning of each station screw rod, the screw nut screwing device comprises a screw nut pre-screwing friction plate, a first screw nut screwing wheel, a clamping stagnation release friction plate, a second screw nut screwing wheel, a small motor and the like. The assembling machine can realize the automatic assembly of each part of the expansion screw bolts and has the characteristics that the assembly efficiency is high, and the cost is low; and screw nuts are subjected to two links of pre-screwing and screwing, and the assembly quality is ensured.

Description

technical field [0001] The invention relates to the field of hardware machinery, in particular to an automatic assembly device for expansion bolts. Background technique [0002] Expansion bolts are a commonly used fastener with the characteristics of convenient installation and high connection strength. They are widely used in the connection of building components and equipment installation. There are many types of expansion bolts, which can be divided into two categories: metal expansion bolts and plastic expansion bolts (screws) according to the material of the expansion tube; the latter is relatively simple to realize automatic assembly because it only consists of plastic expansion tubes and self-tapping screws. At present, this type of automatic assembly machine is available, and the production efficiency is very high; while the metal expansion bolt has a relatively complicated structure and many parts. For example, a commonly used expansion bolt consists of a metal slee...

AI Technical Summary

Problems solved by technology

There are many types of expansion bolts, which can be divided into two categories: metal expansion bolts and plastic expansion bolts (screws) according to the material of the expansion tube; the latter is relatively simple to realize automatic assembly because it only consists of plastic expansion tubes and self-tapping screws. At present, this type of automatic assembly machine is available, and the production efficiency is very high; while the metal expansion bolt has a relatively complicated structure and many parts. For example, a commonly used expansion bolt consists of a metal sleeve, a screw, a flat washer, a spring washer and a nut. Composed of five parts, it is difficult to realize automatic assembly

Although the manual assembly is simple, the production efficiency is low, the labor intensity is high, and there are often problems such as the nuts cannot be screwed in place.

In recent years, automatic assembly machines have also appeared for metal expansion bolts, such as the automatic assembly machines described in patents 201110217756.8 and 201120275650.9. The assembly method is to first load nuts, spring washers, flat washers and sleeves into the fixture in sequence, and then put the screw Penetrate into the casing and other holes from top to bottom, and finally drive the screw to rotate through the rotating device and tighten it with the nut; since the assembly work of each station must be completed when the turntable and fixture are in a static state, the main engine adopts intermittent movement mechanism, which limits the production efficiency of the assembly machine; in addition, it is difficult for the screw to be positioned accurately when passing through parts such as sleeves, which increases the difficulty of screwing the screw head and the nut, which will affect the quality of product assembly

[0003] With the rapid development of the economy, the demand for expansion bolts is increasing, and higher requirements are put forward for the production efficiency, quality and cost of expansion bolt assembly, but the existing technology cannot effectively solve these problems

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