濟南伸縮棚憑借靈活的伸縮功能，在商業展覽、倉儲遮陽、戶外活動等場景中廣泛應用，其伸縮原理依托機械結構與動力系統的協同運作，通過有序的部件聯動實現棚體的展開與收縮。適應濟南四季分明的氣候特點，伸縮棚需在高溫、多雨、大風等環境下保持穩定運行，其原理設計既注重操作便捷性，又兼顧結構性，確保在不同場景中發揮作用。

　　Jinan retractable sheds are widely used in commercial exhibitions, warehouse shading, outdoor activities, and other scenarios due to their flexible expansion and contraction functions. Their expansion and contraction principles rely on the coordinated operation of mechanical structures and power systems, and the orderly linkage of components to achieve the expansion and contraction of the shed. Adapting to the distinct climate characteristics of four seasons in Jinan, the retractable shed needs to maintain stable operation in environments such as high temperature, heavy rain, and strong winds. Its principle design emphasizes both operational convenience and structural safety, ensuring efficient performance in different scenarios.

　　骨架結構的嵌套與滑動是伸縮的基礎，決定棚體展開與收縮的范圍。伸縮棚的骨架多采用鋁合金或鍍鋅鋼管，主框架由多組平行的伸縮架組成，每組伸縮架包含固定段與活動段，通過嵌套式設計實現相對滑動。固定段鋼管內壁設有凹槽，活動段鋼管端部的滑輪嵌入凹槽內，使活動段可沿固定段軸向移動，移動過程中滑輪減少摩擦阻力，確保伸縮順暢。相鄰伸縮架之間通過橫向連桿連接，連桿兩端采用鉸鏈結構，當骨架展開時，連桿隨伸縮架角度變化而伸展，形成穩定的三角形支撐結構，提升整體剛性；收縮時，連桿折疊收攏，帶動各伸縮架同步靠攏，使棚體體積縮小原尺寸的 1/3-1/5，節省存放空間。濟南地區冬季多風，骨架連接處的鎖止裝置（如彈簧卡扣、手動旋鈕）在展開后可自動或手動鎖定，防止風力導致骨架回縮。

　　The nesting and sliding of the skeleton structure are the foundation of expansion and contraction, determining the range of expansion and contraction of the shed. The skeleton of the telescopic shed is mostly made of aluminum alloy or galvanized steel pipes, and the main frame is composed of multiple sets of parallel telescopic frames. Each set of telescopic frames includes a fixed section and a movable section, and relative sliding is achieved through nested design. The inner wall of the fixed section steel pipe is equipped with a groove, and the pulley at the end of the movable section steel pipe is embedded in the groove, allowing the movable section to move axially along the fixed section. During the movement, the pulley reduces frictional resistance, ensuring smooth expansion and contraction. Adjacent telescopic frames are connected by transverse connecting rods, and the two ends of the connecting rods adopt hinge structures. When the skeleton is unfolded, the connecting rods extend with the angle change of the telescopic frame, forming a stable triangular support structure and enhancing the overall rigidity; When shrinking, the connecting rod folds and collapses, driving the various telescopic frames to approach synchronously, reducing the volume of the shed to 1/3-1/5 of its original size and saving storage space. The winter in Jinan area is windy, and the locking devices (such as spring buckles and manual knobs) at the joints of the skeleton can be automatically or manually locked after deployment to prevent the skeleton from retracting due to wind force.

　　動力系統的驅動為伸縮提供動力，根據棚體大小采用不同驅動方式。小型伸縮棚（跨度 5 米以內）多采用手動驅動，通過搖柄連接齒輪箱，搖動時齒輪帶動鏈條或鋼絲繩牽引伸縮架，利用杠桿原理節省人力，單人即可完成操作，適合商鋪門前等小范圍使用場景。中大型伸縮棚（跨度 5-15 米）則配備電動驅動系統，由電機通過減速器輸出動力，經傳動軸帶動兩側的齒條或螺桿轉動，齒條與伸縮架上的齒輪嚙合，在電機正反轉時驅動骨架展開或收縮。電動系統配備控制面板，可通過按鈕、遙控器或智能終端操作，部分高端產品具備行程限位功能，當棚體達到展開或收縮位置時自動停機，避免過度操作導致結構損壞，適應濟南、廣場等需要快速啟閉的場所。

　　The drive of the power system provides power for expansion and contraction, and different driving methods are adopted according to the size of the shed. Small telescopic sheds (with a span of less than 5 meters) are often manually driven, connected to a gearbox through a handle. When shaken, the gear drives a chain or steel wire rope to pull the telescopic frame, using the lever principle to save manpower. It can be operated by a single person and is suitable for small-scale use scenarios such as in front of shops. Medium to large-sized telescopic sheds (with a span of 5-15 meters) are equipped with an electric drive system. The motor outputs power through a reducer and drives the racks or screws on both sides to rotate through a transmission shaft. The racks mesh with the gears on the telescopic frame and drive the skeleton to expand or contract when the motor rotates forward or backward. The electric system is equipped with a control panel that can be operated through buttons, remote controls, or smart terminals. Some high-end products have a travel limit function, which automatically stops when the shed reaches the maximum expansion or contraction position, avoiding structural damage caused by excessive operation. It is suitable for places such as Jinan shopping malls and squares that require quick opening and closing.

　　布料張緊與收納的協同保障伸縮過程中篷布的平整與。篷布采用耐磨、防水的 PVC 涂層布或帆布，兩端分別固定在骨架的固定端與活動端，中間通過卡扣或魔術貼與骨架連接。展開時，隨著骨架伸展，篷布被均勻拉伸，通過張緊裝置（如彈簧拉桿、可調卡扣）保持適當張力，確保表面平整無褶皺，有效遮擋陽光或雨水；收縮時，篷布隨骨架收攏而折疊，折疊方向與骨架伸縮方向一致，避免因折疊不當造成布料撕裂。針對濟南夏季強紫外線環境，部分篷布表面涂有抗老化涂層，在反復伸縮折疊過程中不易出現開裂，同時布料與骨架接觸部位采用包邊處理，增強耐磨性，延長使用壽命。

　　The coordination of fabric tension and storage ensures the smoothness and safety of the tarpaulin during the stretching process. The tarpaulin is made of wear-resistant and waterproof PVC coated cloth or canvas, with both ends fixed to the fixed and movable ends of the skeleton, and connected to the skeleton through buckles or Velcro in the middle. When unfolded, as the skeleton extends, the tarpaulin is evenly stretched and maintained with appropriate tension through tensioning devices (such as spring pull rods, adjustable buckles) to ensure a smooth and wrinkle free surface, effectively blocking sunlight or rain; When shrinking, the tarpaulin folds along with the skeleton, and the folding direction is consistent with the direction of the skeleton's expansion and contraction, to avoid tearing the fabric due to improper folding. In view of the strong ultraviolet environment in Jinan in summer, some tarpaulins are coated with anti-aging coating, which is not easy to crack in the repeated expansion and folding process. At the same time, the contact part between the cloth and the skeleton is wrapped to enhance the wear resistance and extend the service life.

　　導向與限位裝置確保伸縮軌跡精準，防止部件偏移或碰撞。在骨架底部或側面設有導向軌，活動段底部的滑塊嵌入導向軌內，限制伸縮架只能沿直線方向移動，避免因受力不均導致骨架歪斜。大型伸縮棚的導向軌末端安裝緩沖裝置（如橡膠墊、彈簧），當棚體收縮極限位置時，活動段與緩沖裝置接觸，減少撞擊力，保護部件。部分伸縮棚配備同步控制系統，通過傳感器監測兩側骨架的伸縮速度，若出現單側滯后（偏差超過 5cm），系統會自動調整電機輸出，使兩側保持同步，防止因受力失衡導致骨架變形，這種設計在濟南多風天氣下能提升棚體的抗風穩定性。

　　The guiding and limiting devices ensure precise expansion and contraction trajectories, preventing component displacement or collision. There are guide rails at the bottom or side of the skeleton, and the sliding block at the bottom of the movable section is embedded in the guide rail to restrict the telescopic frame from moving only in a straight line direction, avoiding the skeleton from tilting due to uneven force. A buffer device (such as rubber pad, spring) is installed at the end of the guide rail of a large retractable shed. When the shed body shrinks to the extreme position, the movable section comes into contact with the buffer device to reduce the impact force and protect the components. Part of the retractable shed is equipped with a synchronous control system, which monitors the expansion speed of the skeleton on both sides through sensors. If there is a single-sided lag (deviation exceeding 5cm), the system will automatically adjust the motor output to keep both sides synchronized and prevent skeleton deformation caused by unbalanced force. This design can improve the wind resistance stability of the shed in windy weather in Jinan.

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