Electric screwdriver bit quick-replacing device and method, bit quick-replacing type screw tightening machine and tightening method of bit quick-replacing type screw tightening machine

Abstract

The invention discloses an electric screwdriver bit quick-replacing device and method, a bit quick-replacing type screw tightening machine and a tightening method of the bit quick-replacing type screwtightening machine. The electric screwdriver bit quick-replacing device comprises a positioning sleeve, a floating sleeve is inserted in the positioning sleeve, a bit mounting shaft is inserted in aninner hole of the floating sleeve, and a set of through holes are formed in the groove walls of a quick-replacing groove of the bit mounting shaft, wherein pins are inserted in the through holes; thelength of the pins is greater than that of the through holes, and the two ends of the pins are outward protruding arc surfaces; in a normal state, the pins correspond to the first height of the floating sleeve, and at the first height, the distance from the hole wall of the inner hole to the side wall of the quick-replacing groove is less than the length of the pins; in a press-stopping state, the pins correspond to the second height of the floating sleeve, and at the second height, the distance from the hole wall of the inner hole to the side wall of the quick-replacing groove is not less than the length of the pins. When the pins correspond to the two different heights of the floating sleeve, different position states can be achieved, thus the electric screwdriver bit quick-replacing device can be matched with a power output piece of an electric screwdriver to be connected with and separated from the power output piece, conditions are created for quick replacing of bits, and automatic replacing is achieved conveniently.

Description

technical field [0001] The invention relates to the field of automatic screwing tools, in particular to an electric screwdriver quick-change device and a quick-change method thereof, a quick-change screw tightening machine and a screwing method thereof. Background technique [0002] With the development of social science, the level of mechanical automation technology is getting higher and higher. Among various products, screws and bolts are currently the most widely used fasteners. Due to the increasingly complex structure of products, the screws on a single product The number is increasing, and the types of screws are also increasing. In order to adapt to the screwing requirements of different screws, it is necessary to change the bit to suit the type of the screw. Therefore, various electric screwdrivers often come with replacement caps. The structure of the head, such as a lever-type locking buckle or an elastic pin and other locking structures, but these structures are o...

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Problems solved by technology

[0002] With the development of social science, the level of mechanical automation technology is getting higher and higher. Among various products, screws and bolts are currently the most widely used fasteners. Due to the increasingly complex structure of products, the screws on a single product The number is increasing, and the types of screws are also increasing. In order to adapt to the screwing requirements of different screws, it is necessary to change the bit to suit the type of the screw. Therefore, various electric screwdrivers often come with replacement caps. The structure of the head, such as a lever-type locking buckle or an elastic pin and other locking structures, but these structures are often relatively small, and generally can only be replaced by manual operation, and it is difficult to use various automation equipment to simulate human hands. operation, therefore, this kind of shawl replacement structure often cannot carry out the automatic replacement of the bit; even if there is a mechanical structure that can realize automatic replacement, it also needs at least one mechanism to drive the locking structure, while another mechanism carries out the disassembly and installation, which leads to the complexity of the equipment structure, and requires multiple drive structures, increasing the cost of the equipment

[0003] In addition, there are some automatic screw locking devices currently on the market. One screwing action can only install one screw, and its screwing efficiency is relatively low, which cannot meet the requirements of simultaneous screwing of multiple screws at different positions.

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