A rivet nut electric gun

Abstract

The invention relates to an electric gun for riveting nuts, which is used in the technical field of machinery, including an outer cover, a trigger, a circuit board, a power motor assembly, a riveting system, a screw drive system, a clutch control system and a planetary gear reduction system; A circuit board, a trigger, a travel fixing board and a travel adjustment board are provided, and the circuit board is connected with the motor and the travel control board through a control line; sensors are arranged at both ends of the travel control board, and the travel fixing board and the travel adjustment board are assembled through a travel adjustment nut Control; the roller positioning block is provided with a magnet; the sensor is located under the magnet; the center line of the power motor assembly, the planetary gear reduction system, the screw drive system and the riveting system are on the same axis as the riveting direction. The electric gun has strong power and can be used indoors and outdoors. It is ergonomic when used in hand. It has the largest tool space and can be riveted on rivet nuts of different specifications. The clutch control system is more reliable, the riveting system is more stable, and the applicability powerful.

Description

technical field [0001] The invention belongs to the technical field of machinery, in particular to an electric gun for rivet nuts. Background technique [0002] The rivet nut tool is a tool specially used for the installation of rivet nuts, including pneumatic rivet nut guns and electric rivet nut guns. The pneumatic rivet nut tool has the advantages of fast speed and large pulling force. The rotating blades of the air motors are frequently used or have a slightly dusty working environment, they will suddenly get stuck and not work, there is a great hidden danger of the motor crashing, and the air motor has a small torque due to the volume limit, although the riveting tension It can be made larger, but the volume will increase accordingly, and it cannot be used outdoors without an air source; at present, there are two riveting methods for electric rivet nut guns, one is completely relying on rotary riveting, this riveting method Easy to damage the rivet nut. The other is m...

AI Technical Summary

Problems solved by technology

[0004] 1. Because the mechanical clutch stroke cannot be adjusted, the clutch requirement can only be achieved at a fixed position, and the empty stroke is large, resulting in waste of time and power consumption, and low production efficiency

[0005] 2. Rely on the torsion force of the mechanical torsion spring to ensure the size of the rotation force. The tightening force of the rivet nut is small when it is installed and loosened. When it encounters an abnormality, the rivet nut cannot be unscrewed. When the torsion spring is used frequently, it will repeatedly rub against other related mechanical components. And impact, the torsion spring is easy to get hot, causing the torsion of the torsion spring to become unstable with the change of temperature, resulting in the hidden danger that the rivet nut will be damaged or not screwed in place during the loading process

[0006] 3. The normal operation is extremely cumbersome, and it is necessary to adjust multiple threaded structural parts at the same time to ensure the screw-in length and riveting length. These threaded structural parts not only need to ensure the adjustment stroke requirements, but also need to meet the riveting strength requirements. Due to the need for more reliable riveting, The thread needs to be tightened (if the thread is not tightened, it is easy to loosen and change, which will cause the stroke to change and damage the thread). Often the adjusted stroke changes after the thread is tightened. It is difficult for non-professionals and unskilled people to operate smoothly. In small batches Adjustment time is often longer than use time when using rivet nuts

[0007] 4. The structure is complex, there are many parts, many of which are vulnerable parts, and are not easy to replace, prone to failure and low life

[0009] (1) The motor meshing teeth meshing with the motor teeth cannot be made very large, and cannot exceed the axis where the screw nut assembly and the screw nut are located, otherwise interference will occur, so the number of teeth and modulus of the gear are greatly restricted, and can only be limited within a very small range;

[0010] (2) The motor meshes with the motor teeth without interfering and wasting space as much as possible. Therefore, the size of the motor is limited. The speed and power of the motor are closely related to its size. If the torque of the motor is too small, the power will become smaller. The larger the motor, the larger the motor shaft will be as the power increases, and the motor teeth will also need to be larger, otherwise they will not be able to mesh, and the reduction ratio will be affected after the motor teeth are enlarged

Therefore, it is difficult to freely choose a suitable matching motor in this design;

[0011] (3) The screw nut parts are reprocessed with gears outside the nut. The process is extremely complicated and the requirements are high. The key defect is that if the gear design of the screw nut is too large, the space will be wasted, and the gear design is too small to meet the meshing conditions. ;To sum up, in the design of this tool, the speed of the motor, the reduction ratio of the reduction gear, and the size of the screw can not be designed according to the needs. It is often a large horse-drawn cart with a slow speed, or a small horse-drawn cart. The cart cannot be pulled, and the current electric rivet nut tool cannot break off large-sized rivet nuts with strong riveting force;

[0012] (4) The coordination requirements of the motor assembly, gear, and screw assembly are high. It is necessary to ensure that the three axes are on the same plane while ensuring that the three are parallel. A slight deviation in parallelism and flatness will affect the meshing requirements, resulting in Tool is noisy

[0013] 6. In terms of appearance design, the arrangement of various accessories is limited to parallel arrangement. For example, the motor must be placed in the direction parallel to the direction of the screw rod. The use of space is greatly restricted, resulting in a lot of waste of space, and the shape of the tool is bloated. The center of gravity cannot meet the needs of human mechanics, and there is no good point of strength for shaking hands and holding the tiger's mouth. It is easy to fatigue when using it. It is difficult to change this inhumane mechanism layout under the existing conditions.

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