Awning pulley accessories, smooth retractable secrets
Awning pulley accessories can be smoothly retractable, mainly depends on the following aspects:
Material of pulley
Metal material: such as aluminum alloy, stainless steel, etc. Aluminum alloy pulley light weight, high strength, corrosion resistance, smooth surface, and the friction between the track is small, to ensure that the awning closed smoothly. Stainless steel pulley has higher strength and corrosion resistance, especially suitable for harsh environment, its good rigidity can ensure that the pulley is not easy to deform in long-term use, maintain smooth rolling performance. Engineering plastic material: such as nylon, polyformaldehyde (POM) and other engineering plastics, with good self-lubrication, low friction coefficient characteristics. Nylon pulley also has a certain degree of elasticity, can buffer the impact between the pulley and the track to a certain extent, reduce the phenomenon of stuck, so that the awning retraction more stable. The pulley of POM material has high strength, good dimensional stability, excellent wear resistance, and can maintain smooth running state for a long time. In fact, engineering plastics are widely used in automobile manufacturing.
Pulley with bearings: the application of bearings can greatly reduce the friction when the pulley rotates. For example, some high-quality awning pulleys use ball bearings or needle roller bearings, which enable the pulley to maintain flexible rotation under large loads, ensuring that the awning is easily retractable.
Design and construction of the pulley
Reasonable wheel diameter: When rolling, the larger diameter pulley has relatively less contact point with the track, relatively less friction, and it is easier to cross some small defects or obstacles on the track, which helps the smooth retracting of the awning. At the same time, the appropriate wheel diameter can also make the pulley's moment of inertia moderate, to avoid due to the moment of inertia is too large or too small caused by the retraction is not smooth.
Multi-wheel design: Some awnings use multiple pulleys to work together, such as double pulley or three pulley structure. This design can evenly distribute the weight of the awning across multiple pulleys, reducing the burden on a single pulley and reducing the pressure between each pulley and the track, thus reducing friction and making the retracting process easier and smoother. And the multi-wheel design can also increase the stability of the awning during the retracting process, preventing the awning from tilting or stalling.
Special wheel groove design: It is essential that the shape and size of the pulley groove match the track. Some pulley grooves adopt special curved or V-shaped design, which can better fit with the track, increase the contact area at the same time, make the pulley running on the track more stable, reduce shaking and offset, and ensure the smooth and accurate when the awning is retracted.
Fit of track
Material and surface treatment of the track: the track is usually made of aluminum alloy, steel and other materials. Aluminum alloy track light weight, corrosion resistance, the surface after anodizing treatment, can form a hard, smooth oxide film, not only beautiful, but also effectively reduce the friction between the pulley. Steel track strength is high, if after chrome plating or galvanized surface treatment, can also obtain good smoothness and corrosion resistance, for the pulley to provide smooth running track.
The smoothness and straightness of the track: the installation accuracy of the track has a great influence on the smooth retracement of the pulley. The flat and straight track can make the pulley evenly stressed to avoid excessive local pressure or offset of the pulley. When installing the track, it is necessary to strictly control its levelness and perpendicularity, to ensure that the spacing between the tracks is uniform and consistent, and to create a good operating environment for the pulley. Large awning manufacturers often can achieve high quality standards in the processing of the track, so it is best to find a large manufacturer with many years of experience to buy.
