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[Chemical Knowledge]：Positive and negative wire sleeve principle analysis, master the mechanical principle

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The forward and reverse wire sleeve is a common transmission structure in the mechanical field, which is composed of two positive and reverse threads. The normal and reverse threads are two parallel spiral stripes with opposite directions, such as a clockwise spiral and a counterclockwise spiral. When the two threads cooperate with each other, they will produce a circumferential force to achieve work. Forward and reverse wire sleeves are mostly used in construction machinery transmission parts, such as vehicles, supporting devices, etc., with the advantages of large torque transmission and good stability.

in the forward and reverse wire sleeve, the mating surface between the positive thread and the reverse thread is called the thread fitting surface, and their fitting form is to go around each other, so as to achieve the purpose of mutual adhesion and not easy to fall off. At the same time, under vibration and shock conditions, the cyclic friction energy between the two threads is continuously generated, so that its adhesion and sealing can be maintained. The structural composition of the

forward and reverse wire sleeve mainly includes two clamps and a central support. Among them, the two clamps are composed of nuts, screws, transmission shafts and bearings, and the purpose of fastening is achieved through internal and external thread cooperation. The central support is also composed of multiple parts, such as supporting sections, bearings, small bearings and spring wires, etc., mainly to maintain the matching gap between the forward and reverse wire sleeves, which cannot be too tight, or dance out, resulting in poor integration. The working principle of

forward and reverse wire sleeve is realized according to the law of spiral movement. The inlay between the positive thread and the reverse thread ensures their contact area and also avoids loosening between the two screws. When an external pushing or pulling force is applied to the mechanical device, the external force will be transmitted to the positive thread through the clamp, and the reverse thread will also be caused to rotate with it. Under the action of these forces, a relative movement occurs between the positive thread and the reverse thread, thus achieving the purpose of mechanical transmission.
the service life of the
positive and negative wire sleeve is long, the user should pay attention to maintenance and maintenance before use, so as to avoid damage to the device due to long-term inattention. In normal use, be sure to pay attention to clean, keep it dry and clean. For long-term use of equipment, regular inspection and replacement of damaged parts to increase the service life of the forward and reverse wire sleeve.

Generally speaking, mastering the principle of mechanical engineering requires a detailed understanding of the mechanical components and structural composition, and the positive and negative wire sleeve is also one of the very important transmission structures. It is hoped that the analysis of this paper can help readers to better grasp the principle of positive and negative wire sleeve, and provide better reference and help for the research and application of mechanical engineering.

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