In many cases, the installation, use, and maintenance of screws and nuts will require professional tools for disassembly and assembly. Based on the knowledge of screws and nuts, Zhongwei Standard Parts Network will share the structure and matching requirements of screw and nut disassembly tools. Hope Help everyone.
1. The structure of the screw and nut disassembly tool
The rotating structure is a driving structure that drives the first rotating structure, and is used to drive the rotation to operate. For the second rotating structure, the angle between the rotating center line and the center line of the rotating structure should be set between 0° and 180°. The rotation direction of the screw and nut dismounting drive structure is set to be the same as the rotation direction of the dismounting tool, so as to realize maintenance and repair in a narrow space.
2. Size matching requirements
Connect the second set of rods to the adjacent sections of the second connecting rod. At this time, the vertical surface fit of the screw and nut is very small. During the commutation transmission, the screw and nut can be treated as a whole to make the outer phase appear hexagonal. , the sleeve head is set at the other end of the second connecting rod at this time, the screw nut is melted, and the T-shaped integral construction is carried out. Based on the driving of external force, the handle can be rotated, and the gear can be driven into the screw nut through the handle connecting rod, and the connection is fixed. Then turn the other end of the connection, and set the fixing rod vertically, which is used to melt the screws and nuts.
The sleeve is arranged on the rotatable around the connection point, the fixed rod and the linkage rod at the other end can be connected and rotated, and the rotation has a sense of rotation, so that the corresponding sleeve head corresponds to the opening of the sleeve head, and the corresponding screws and nuts are fixed Rotate without moving to realize paired disassembly and assembly of screws and nuts.
Materials include: the most common ones are SS302/SS304/SS316, as well as carbon steel, stainless steel, stainless iron, copper, aluminum, etc.; C1035 or even products with lower nickel content, use grade 8.8 screws; C1018 is generally used as machine screws, Self-tapping screws; high carbon steel (C1045/C1050) is similar in appearance to stainless steel, and is generally used for self-tapping screws C1045/10B21/40Cr, also known as non-authentic stainless steel products; grade 10.9 screws; carbon steel is generally made of C1008 They are all ordinary grade products, and are divided into low carbon steel (such as C1008/C1010/C1015/C1018/C1022), medium carbon steel (such as C1035), and the more popular ones are SS201 products, alloy steel (SCM435/10B21/40Cr); 4.8 grade screws, ordinary grade nuts; C1015 generally use lifting ring screws or 12.9 grade screws, but the anti-corrosion performance is very different.
The new nut screw dismantling tool is provided with an annular sleeve and a bearing in the middle of the handle and the body. When in use, you can hold the annular sleeve with one hand, quickly unscrew the bolt, and hold the handle with the other hand. Grip pre-energized. When the bolt is removed, the body rotates in the bearing, the handle can rotate the bolt continuously, and the two hands can exert force at the same time, and the work efficiency is greatly improved.
3. Precautions for disassembly and assembly of screws and nuts
In order to prevent loosening of double nut fasteners, nuts and bolts of the same height can be used to tighten, and this method can also increase the friction between threads or between the bolt and the nut supporting surface. Tightening the inner nut when the frictional force increases is equivalent to tightening the outer nut with 100% torque, which can effectively avoid loosening, prevent the nut from loosening, and will not affect its use due to space factors. assembly to achieve the purpose of motorized assembly. Therefore, this method is also the most used one. For the rusted screw and nut, it cannot be rigidly disassembled. In order to prevent twisting and breaking, you can knock first, then loosen the rusted nut, and knock the cast iron casing according to the thickness of the motor casing. Rotate in the way of shackle, knock the nuts of each section, and knock with iron keys to disassemble and assemble. In addition, if the corrosion is serious, it may also be difficult to loosen. Therefore, the expansion principle can be used, for example, 80% of the assembly torque can be used, so that the nut and the bolt will be tighter, and more space will be required for installation, and the frictional resistance will be reduced. There is an obvious improvement, but the weight of the nut also increases, which effectively avoids the problem of loosening, which is a relatively simple assembly method.
With the continuous development of technology, tools for disassembling and assembling utility model nuts and screws emerge in an endless stream, including a main body, a hexagonal rotating rod and a handle. The rotating rod can be inserted into the inner hexagonal hole. on the upper part of the body. Bearings are installed at the upper and lower ends of the inner hole of the annular sleeve, the body is fitted in the bearing, and the lower end of the body is provided with an axial inner hexagonal hole. There are locking screws, and the handle is lightly turned, which saves time and effort.zj-junyue.com