DIN472 German Standard Elastic Retaining Ring for Thickened Holes C-type Retaining Ring

Nut fasteners are widely used in various industries with connection and fastening requirements, such as in vehicles, construction machinery, agricultural machinery, manufacturing machinery, etc. For large construction machinery or vehicles, due to the harsh working environment and the impact of heavy loads, the nuts and fasteners on them are subjected to vibrations and loads from all directions, which makes the nuts easier to loosen, resulting in reduced or even ineffective fastener functionality. Causing significant safety hazards.

At present, in the industry, pure manual installation method is used for the installation of elastic cylindrical pins, where workers first hold the tool holder; Next, manually place the elastic cylindrical pin into the elastic cylindrical pin hole of the tool holder; Afterwards, use your body to position the tool holder and use a hammer to knock the elastic cylindrical pin into the tool holder. This installation method requires manual operation throughout the entire process, resulting in low work efficiency. Moreover, when hammering, it is necessary for the staff to use their bodies to position the knife holder, which poses a risk of injuring people and poses a safety hazard. In addition, hammering can cause deformation of the elastic cylindrical pin, resulting in a lower qualification rate for assembly.

Loose screws are a commonly used riveting component. Usually, the loose screws are directly pressed and riveted onto the motherboard to fix the components, and there are high requirements for the distance between the holes opened on the components. Once the distance between the through-holes on the components does not match the distance between the pressure riveting holes on the motherboard, the components cannot be pressed and riveted onto the motherboard, resulting in defective or scrap products, increasing production costs and reducing production efficiency.

Figure 1 is a schematic diagram of the upper tool structure of this utility model, Figure 2 is a schematic diagram of the lower tool structure of this utility model, Figure 3 is a schematic diagram of the lower mold body structure of this utility model, and Figure 4 is a schematic diagram of the positioning rod structure of this utility model. [13] In the figure: 1. Upper mold, 11. Upper mold installation rod, 2. Lower mold, 21. Hole, 22. Second hole, 23. Third hole, 3. Lower mold installation rod, 4. Spring, 5. Positioning rod, 51. Riveting nut positioning rod, 52. Riveting preset hole positioning rod, 54. Spring stopper.

The heating bolt pre elongation method involves heating the bolt to pre extend to the required amount of deformation, then tightening the nut. After cooling, the bolt is shortened and connected for pre tightening. This is a commonly used fastening method in infrastructure installation. But it is not suitable for devices that often require disassembly and adjustment, because during the disassembly process, the connected parts and bolts are heated together and stretched, and the use of open flame heating may be limited in certain situations; The use of electric heating will make the structure of the screw more complex and increase investment, and even if it is difficult to disassemble, such as the propeller shaft of a ship, the heating method is not applicable.