Air expansion shaft with external expansion keys

Abstract

The utility model discloses an air expansion shaft with external expansion keys, and relates to the technical field of air expansion shafts. Comprising an inflatable shaft body, an expansion key is arranged on one side of the inflatable shaft body, a plurality of equidistant through holes are formed in the outer wall of the expansion key, key bars are slidably connected into the through holes, and fixing mechanisms are arranged at the two ends of the inflatable shaft body. Through the arrangement of the fixing mechanism, in the using process, firstly, the air expansion shaft body is inserted into the fixing ring, then the control ring is manually rotated to drive the lead screw to rotate so that the clamping plate can fix the air expansion shaft body, and then the rotating ring is manually operated so that the clamping ring can clamp the air expansion shaft body; and meanwhile, a sliding rod is manually operated to move to a proper position along a fixing pipe, is fixed through a limiting rod and is finally fixed through a connecting ring, an anti-skid pad and an expansion key, the device can provide strong clamping force for the inflatable shaft body, and it is ensured that the inflatable shaft cannot move or loosen due to external force in the working process.

Description

Technical Field

[0001] This utility model relates to the field of air shaft technology, specifically an air shaft with an external expansion key. Background Technology

[0002] For example, a pneumatic shaft with external expansion keys, as disclosed in patent publication number CN104891274A, includes a pneumatic shaft body. Multiple sets of pneumatic key assemblies are arranged in a circumferential array on the surface of the pneumatic shaft body. These pneumatic key assemblies are detachably externally mounted on the outer surface of the pneumatic shaft body, and their air bladders are connected to air valves on the pneumatic shaft body via air pipes inside the pneumatic shaft body. This allows for easy, convenient, and quick installation and removal of the pneumatic key assemblies from the pneumatic shaft body, resulting in high production and maintenance efficiency. Furthermore, the pneumatic key uses a metal plate, ensuring high strength and sufficient friction with the winding drum, providing constant and controllable tension for materials of different widths, resulting in high winding quality and good rewinding effect. Simultaneously, the use of reset foam, which is integrally fixed with the rubber expansion key and metal plate, reduces costs, simplifies the structure, significantly reduces assembly difficulty, and increases assembly efficiency, enhancing market competitiveness and facilitating widespread application.

[0003] However, during the use of the above-mentioned equipment, due to the design of its internal air shaft, there is insufficient stability during the rapid rotation of the air shaft, resulting in poor performance of the air shaft. Therefore, we propose a more convenient and practical air shaft to meet the usage requirements. Utility Model Content

[0004] The purpose of this invention is to provide an air shaft with an external expansion key to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air shaft with an external expansion key, comprising an air shaft body, an expansion key being provided on one side of the air shaft body, a plurality of equidistant through holes being opened on the outer wall of the expansion key, a key strip being slidably connected in the through holes, a fixing mechanism being provided at both ends of the air shaft body for fixing the air shaft body, the fixing mechanism comprising a fixing ring, a plurality of equidistant clamping rings being fixedly connected to one side of the fixing ring, the clamping rings being in contact with the air shaft body, a rotating ring being screwed to one side of the clamping rings, and an adjustment component being provided on one side of the fixing rings.

[0006] Furthermore, an air inlet is fixedly connected to one side of the air shaft body, and a cap is screwed to one end of the air inlet.

[0007] Furthermore, an air pump is installed on the side of the air shaft body away from the air inlet.

[0008] Furthermore, the outer wall of the fixing ring is provided with multiple equidistant through holes, and a lead screw is screwed into the through holes. One end of the lead screw is fixedly connected to a control ring, and the other end is rotatably connected to a clamping plate. The clamping plate is in contact with the air shaft body.

[0009] Furthermore, the adjustment assembly includes at least three fixed tubes connected to a fixed ring. A sliding rod is slidably connected to the inner wall of one end of each fixed tube. A through hole is provided on one side of the fixed tube, and a limit rod is inserted into the through hole, with the limit rod passing through the sliding rod.

[0010] Furthermore, a connecting ring is fixedly connected to one end of the sliding rod, and an anti-slip pad is fixedly connected to one side of the connecting ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This externally mounted air shaft, through its fixing mechanism, operates by first inserting the air shaft body into the fixing ring. Then, manually rotating the control ring drives the lead screw to rotate, fixing the clamping plate to the air shaft body. Next, manually operating the rotating ring clamps the air shaft body, while simultaneously manually operating the sliding rod to move along the fixing tube to the appropriate position and securing it with the limit rod. Finally, it is fixed to the expansion key via the connecting ring and anti-slip pad. This device provides strong clamping force to the air shaft body, ensuring that it will not move or loosen due to external forces during operation, thus guaranteeing the stability and safety of the equipment. It is highly practical and suitable for widespread adoption.

[0013] Meanwhile, the air shaft can adapt to different working environments and needs. When it is necessary to quickly release air or adjust the fixing force of the drum, it is convenient to make quick adjustments and improve work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the air shaft structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model.

[0017] In the diagram: 1. Air shaft body; 2. Expansion key; 3. Key bar; 4. Inflation nozzle; 5. Nozzle cap; 6. Vacuum pump; 7. Fixing mechanism; 701. Fixing ring; 702. Lead screw; 703. Control ring; 704. Clamping plate; 705. Clamping ring; 706. Rotating ring; 707. Fixing tube; 708. Sliding rod; 709. Limiting rod; 710. Connecting ring; 711. Anti-slip pad. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Air shafts are required in industrial processing. The air shaft provided by this utility model is specifically designed for packaging film processing in industrial processes. When using this equipment for processing, it is necessary to ensure that all components are properly fixed when installing and disassembling the air shaft. The operating status of the equipment should be checked regularly, including the tightness of the fixing mechanism 7 and the wear of the expansion key 2, to ensure the stability and reliability of the equipment. When using the air shaft for long-term continuous operation, attention should be paid to the heat dissipation of the equipment to avoid damage or performance degradation due to overheating.

[0020] like Figures 1-3 As shown, this utility model provides a technical solution: an air shaft with an external expansion key, including an air shaft body 1, an expansion key 2 on one side of the air shaft body 1, multiple equidistant through holes on the outer wall of the expansion key 2, a key strip 3 slidably connected in the through holes, a fixing mechanism 7 at both ends of the air shaft body 1 for fixing the air shaft body 1, the fixing mechanism 7 including a fixing ring 701, multiple equidistant clamping rings 705 fixedly connected to one side of the fixing ring 701, the clamping rings 705 fitting against the air shaft body 1, a rotating ring 706 screwed to one side of the clamping rings 705, an adjusting component on one side of the fixing ring 701, an inflation nozzle 4 fixedly connected to one side of the air shaft body 1, a nozzle cap 5 screwed to one end of the inflation nozzle 4, and an air pump 6 installed on the side of the air shaft body 1 away from the inflation nozzle 4.

[0021] It should be noted that during use, first insert the air shaft body 1 into the expansion key 2, then open the nozzle 5 and inflate the air shaft body 1 through the air inlet 4 to make the key bar 3 move. After inflation, seal it through the nozzle 5 and control the extension and retraction of the air shaft body 1 through the air pump 6. The air shaft can adapt to different working environments and needs. When it is necessary to quickly deflate or adjust the fixing force of the drum, it is convenient to make quick adjustments and improve work efficiency.

[0022] like Figure 3As shown, the outer wall of the fixing ring 701 has multiple equidistant through holes, and a lead screw 702 is screwed into the through holes. One end of the lead screw 702 is fixedly connected to a control ring 703, and the other end is rotatably connected to a clamping plate 704. The clamping plate 704 is in contact with the air shaft body 1. The adjusting assembly includes at least three fixing tubes 707. The fixing tubes 707 are connected to the fixing ring 701. A sliding rod 708 is slidably connected to the inner wall of one end of the fixing tube 707. A through hole is opened on one side of the fixing tube 707. A limit rod 709 is inserted into the through hole. The limit rod 709 passes through the sliding rod 708. A connecting ring 710 is fixedly connected to one end of the sliding rod 708. An anti-slip pad 711 is fixedly connected to one side of the connecting ring 710.

[0023] It should be noted that during use, first insert the air shaft body 1 into the fixing ring 701, then manually rotate the control ring 703 to drive the lead screw 702 to rotate so that the clamping plate 704 fixes the air shaft body 1. Then manually operate the rotating ring 706 to clamp the clamping ring 705 to clamp the air shaft body 1. At the same time, manually operate the sliding rod 708 to move along the fixing tube 707 to the appropriate position and fix it by the limit rod 709. Finally, fix it to the expansion key 2 by the connecting ring 710 and the anti-slip pad 711. The fixing mechanism 7 can be flexibly adjusted to adapt to air shafts of different specifications and sizes, improving the ease of use and work efficiency of the equipment.

[0024] During use, the air shaft body 1 is first inserted into the expansion key 2. Then, the nozzle 5 is opened and the air inflator 4 is used to inflate the air shaft body 1, causing the key bar 3 to move. After inflation, the nozzle 5 is used to seal the air shaft body 1, and the extension and retraction of the air shaft body 1 is controlled by the vacuum pump 6. Then, the air shaft body 1 is inserted into the fixing ring 701. Next, the control ring 703 is manually rotated to drive the lead screw 702 to rotate, thereby fixing the clamping plate 704 to the air shaft body 1. Then, the rotating ring 706 is manually operated to clamp the clamping ring 705 to the air shaft body 1. At the same time, the sliding rod 708 is manually operated to move along the fixing tube 707 to the appropriate position and is fixed by the limit rod 709. Finally, the air shaft body 1 is fixed to the expansion key 2 by the connecting ring 710 and the anti-slip pad 711. This device provides a strong clamping force for the air shaft body 1, ensuring that the air shaft will not move or loosen due to external forces during operation, thereby ensuring the stability and safety of the equipment.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. An externally expanded key air shaft, comprising an air shaft body (1), characterized in that: An expansion key (2) is provided on one side of the air shaft body (1). Multiple equidistant through holes are opened on the outer wall of the expansion key (2). A key strip (3) is slidably connected in the through holes. A fixing mechanism (7) is provided at both ends of the air shaft body (1) for fixing the air shaft body (1). The fixing mechanism (7) includes a fixing ring (701). Multiple equidistant clamping rings (705) are fixedly connected to one side of the fixing ring (701). The clamping rings (705) are in contact with the air shaft body (1). A rotating ring (706) is screwed to one side of the clamping ring (705). An adjustment component is provided on one side of the fixing ring (701).

2. The air shaft with an external expansion key according to claim 1, characterized in that: An air inlet (4) is fixedly connected to one side of the air shaft body (1), and a cap (5) is screwed to one end of the air inlet (4).

3. The air shaft with an external expansion key according to claim 1, characterized in that: An air pump (6) is installed on the side of the air shaft body (1) away from the air inlet (4).

4. The air shaft with an external expansion key according to claim 1, characterized in that: The outer wall of the fixed ring (701) has multiple equidistant through holes, and a screw rod (702) is screwed into the through holes. One end of the screw rod (702) is fixedly connected to a control ring (703), and the other end is rotatably connected to a clamping plate (704). The clamping plate (704) is in contact with the air shaft body (1).

5. The air shaft with an external expansion key according to claim 1, characterized in that: The adjustment assembly includes at least three fixed tubes (707), which are connected to a fixed ring (701). A sliding rod (708) is slidably connected to the inner wall of one end of the fixed tube (707). A through hole is opened on one side of the fixed tube (707), and a limit rod (709) is inserted into the through hole. The limit rod (709) passes through the sliding rod (708).

6. The air shaft with an external expansion key according to claim 5, characterized in that: One end of the sliding rod (708) is fixedly connected to a connecting ring (710), and one side of the connecting ring (710) is fixedly connected to an anti-slip pad (711).

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