Sealed pneumatic rod

Abstract

The utility model discloses a sealed pneumatic rod, including fixed cylinder and pneumatic telescopic in fixed cylinder one end's pneumatic telescopic rod, the fixed cylinder inside is provided with the air cavity, the movable end is movably installed in the air cavity, the pneumatic telescopic rod fixed connection in movable end top -end, the fixed cylinder outside is fixed with the fixed sleeve, when movable end top and air cavity top end contact, because the length design of air hole and air cavity top end is longer than movable end whole length, air hole is completely exposed at this time, gas can pass through air hole and enter the cavity, and in turn flow into the trachea and telescopic pipe, drive telescopic pipe synchronous extension and support top head. This "first main telescopic, after auxiliary support" grading action design makes the pneumatic rod realize basic telescopic function first in the process of extension, then forms auxiliary support structure through telescopic pipe, and the bearing stability of top head is greatly promoted, and the possible shaking or partial load when single rod telescopic is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic rods, and particularly to a sealed pneumatic rod. Background Technology

[0002] Pneumatic telescopic devices, with their advantages of fast response, large output force, and simple structure, are widely used in automated production lines, precision machinery, logistics equipment, and heavy machinery support. Traditional pneumatic rods mostly employ a single telescopic structure; their core principle is to drive the piston rod to extend or retract through changes in air pressure within the air chamber.

[0003] In practical applications, there are many limitations. When a single piston rod extends or retracts, if it is subjected to eccentric loads or heavy loads, it is prone to shaking, bending and deformation, which affects the positioning accuracy and may even lead to damage to the rod.

[0004] Therefore, it is necessary to propose a sealed pneumatic rod to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a sealed pneumatic rod to solve the problem that in practical applications, when a single piston rod is extended or retracted, it is prone to shaking, bending and deformation if subjected to eccentric loads or heavy loads, which affects the positioning accuracy and may even lead to damage to the rod body.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealed pneumatic rod, comprising a fixed cylinder and a pneumatic telescopic rod that is pneumatically telescopic at one end of the fixed cylinder, wherein an air cavity is provided inside the fixed cylinder, a movable end is movably installed in the air cavity, and the pneumatic telescopic rod is fixedly connected to the top end of the movable end;

[0007] A fixing sleeve is fixed to the outside of the fixing cylinder. A cavity is opened inside the fixing sleeve. A top head is fixed to the top of the pneumatic telescopic rod. An air pipe is connected to the top of the fixing sleeve. A telescopic tube is telescopically connected inside the air pipe. The cavity, air pipe and telescopic tube are connected in sequence. The cavity and air chamber are connected through an air hole. The top of the telescopic tube and the bottom of the top head are connected.

[0008] Preferably, the length between the vent and the top of the air cavity is longer than the overall length of the movable end.

[0009] Preferably, a sealing gasket is fixedly connected to the top of the moving end, and an isolation gasket is fixedly connected to the bottom of the moving end and the bottom of the inside of the fixed cylinder.

[0010] Preferably, the bottom end of the fixed cylinder is provided with an air inlet, which is connected to the interior of the air chamber, and an electromagnetic valve is provided on the air inlet.

[0011] Preferably, a T-shaped groove is provided at the top of the trachea, and the bottom of the telescopic tube and the T-shaped groove are matched to form a lock. A wear-resistant bushing is fixed to the inner wall of the T-shaped groove, and a grease coating is provided on the inner wall of the wear-resistant bushing.

[0012] Preferably, a telescopic spring is fixed between the bottom end of the movable end and the bottom end of the air cavity.

[0013] Preferably, the air inlet is further provided with a filter assembly, which includes a metal filter screen, an activated carbon filter layer and a HEPA filter element arranged in sequence.

[0014] The technical advantage of this invention lies in the following: When the top of the movable end contacts the top of the air cavity, because the length of the air hole and the top of the air cavity is designed to be longer than the overall length of the movable end, the air hole is fully exposed. Gas can then enter the cavity through the air hole and flow into the air pipe and the telescopic pipe in sequence, driving the telescopic pipe to extend synchronously and support the top end. This staged action design of "primary extension followed by auxiliary support" allows the pneumatic rod to first achieve the basic extension function during the extension process, and then form an auxiliary support structure through the telescopic pipe, which greatly improves the load-bearing stability of the top end and avoids the swaying or uneven load that may occur when a single rod extends or retracts.

[0015] The closed-loop airflow channel formed by the cavity, air tube, telescopic tube and air cavity can realize the internal circulation of gas during the extension and contraction process, reduce the amount of external air supply and reduce energy consumption; at the same time, the channel can balance the internal air pressure of the device, avoid the deformation or breakage of components caused by sudden local pressure rise, and improve the operational safety of the pneumatic rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the sealed pneumatic rod of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the fixed cylinder of this utility model.

[0018] Figure 3 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 This utility model Figure 2 Enlarged diagram of point B in the middle.

[0020] In the diagram: 1. Fixed cylinder; 2. Pneumatic telescopic rod; 3. Fixed sleeve; 4. Top end; 5. Air pipe; 6. Telescopic tube; 7. Air chamber; 8. Moving end; 9. Sealing gasket; 10. Air hole; 11. Cavity; 12. Isolation gasket; 13. T-slot. Detailed Implementation

[0021] 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.

[0022] like Figure 1 - Figure 3 As shown, this utility model provides a sealed pneumatic rod, including a fixed cylinder 1 and a pneumatic telescopic rod 2 that is pneumatically telescopic at one end of the fixed cylinder 1. An air chamber 7 is provided inside the fixed cylinder 1, and a movable end 8 is movably installed in the air chamber 7. The pneumatic telescopic rod 2 is fixedly connected to the top end of the movable end 8.

[0023] A fixed sleeve 3 is fixed to the outside of the fixed cylinder 1. A cavity 11 is opened inside the fixed sleeve 3. A top head 4 is fixed to the top of the pneumatic telescopic rod 2. An air pipe 5 is connected to the top of the fixed sleeve 3. A telescopic tube 6 is telescopically connected inside the air pipe 5. The cavity 11, the air pipe 5 and the telescopic tube 6 are connected in sequence. The cavity 11 and the air chamber 7 are connected through an air hole 10. The top of the telescopic tube 6 is connected to the bottom of the top head 4.

[0024] When gas enters the air chamber 7, it pushes up the movable end 8, causing the top of the movable end 8 to contact the top of the air chamber 7. This causes the movable end 8 to drive the pneumatic telescopic rod 2 to extend out of the fixed cylinder 1. When the top of the movable end 8 contacts the top of the air chamber 7, because the length of the air hole 10 and the top of the air chamber 7 is designed to be longer than the overall length of the movable end 8, the air hole 10 is fully exposed. Gas can then enter the cavity 11 through the air hole 10 and flow into the air pipe 5 and the telescopic pipe 6 in sequence, driving the telescopic pipe 6 to extend synchronously and support the top head 4. This staged action design of "primary telescopic followed by auxiliary support" allows the pneumatic rod to first achieve the basic telescopic function during extension, and then form an auxiliary support structure through the telescopic pipe 6, which greatly improves the load-bearing stability of the top head 4 and avoids the swaying or uneven load that may occur when a single rod is telescopic.

[0025] A sealing gasket 9 is fixedly connected to the top of the moving end 8, and isolation gaskets 12 are fixedly connected to the bottom of the moving end 8 and the bottom of the inside of the fixed cylinder 1. The sealing gasket 9 at the top of the moving end 8 is made of high-pressure resistant elastic material. It is always in close contact with the inner wall of the air chamber 7 during the movement of the moving end 8, which can effectively prevent the leakage of high-pressure gas in the air chamber 7, ensure that the pneumatic efficiency is not lost, and at the same time prevent external dust and moisture from entering through the gap, thereby improving the sealing level of the device.

[0026] The isolation pad 12 between the bottom of the movable end 8 and the bottom of the inner part of the fixed cylinder 1 is made of a buffer material (such as high elastic rubber). It can absorb the impact energy when the movable end 8 resets, reduce the collision noise of the parts, reduce the wear caused by direct metal contact, and extend the service life of the movable end 8 and the fixed cylinder 1.

[0027] An air inlet is provided at the bottom of the fixed cylinder 1, and the air inlet is connected to the inside of the air chamber 7. A solenoid valve is provided on the air inlet.

[0028] The top of the air tube 5 has a T-shaped groove 13. The bottom of the telescopic tube 6 and the T-shaped groove 13 are fitted together to form a lock. A wear-resistant bushing 20 is fixed to the inner wall of the T-shaped groove 13, and the inner wall of the wear-resistant bushing is coated with a grease coating. The T-shaped groove 13 at the top of the air tube 5 and the T-shaped structure at the bottom of the telescopic tube 6 form a mechanical lock, which can effectively prevent the telescopic tube 6 from detaching from the air tube 5 during extension or retraction, avoiding equipment failure due to connection failure. The wear-resistant bushing (such as made of polytetrafluoroethylene) can reduce the coefficient of friction between the telescopic tube 6 and the air tube 5, while the grease coating further reduces wear and heat generation during relative movement, making the extension and retraction movements smoother, and extending the maintenance cycle of the telescopic tube and the air tube.

[0029] A telescopic spring is fixed between the bottom end of the movable end 8 and the bottom end of the air chamber 7. When the pneumatic pressure is removed, it can assist the movable end 8 in resetting, speeding up the device's retraction, while reducing the load on the pneumatic system and saving energy consumption.

[0030] The air intake also houses a filter assembly, which consists of a metal mesh, an activated carbon filter layer, and a HEPA filter element arranged sequentially. This filter assembly sequentially filters out particulate matter, odors, and fine impurities from the air, preventing contaminants from entering the air chamber and affecting sealing performance and motion precision, while also reducing wear and corrosion of internal components.

Claims

1. A sealed pneumatic rod, characterized in that: The device includes a fixed cylinder (1) and a pneumatic telescopic rod (2) that is pneumatically telescopic at one end of the fixed cylinder (1). The fixed cylinder (1) has an air chamber (7) inside, and a movable end (8) is movably installed in the air chamber (7). The pneumatic telescopic rod (2) is fixedly connected to the top of the movable end (8). A fixed sleeve (3) is fixed on the outside of the fixed cylinder (1). A cavity (11) is opened inside the fixed sleeve (3). A top head (4) is fixed at the top of the pneumatic telescopic rod (2). An air pipe (5) is connected to the top of the fixed sleeve (3). A telescopic tube (6) is telescopically connected inside the air pipe (5). The cavity (11), the air pipe (5), and the telescopic tube (6) are connected in sequence. The cavity (11) and the air chamber (7) are connected through an air hole (10). The top of the telescopic tube (6) and the bottom of the top head (4) are connected.

2. The sealed pneumatic rod according to claim 1, characterized in that: The length between the top of the vent (10) and the air cavity (7) is longer than the overall length of the movable end (8).

3. The sealed pneumatic rod according to claim 1, characterized in that: A sealing gasket (9) is fixedly connected to the top of the movable end (8), and an isolation gasket (12) is fixedly connected to the bottom of the movable end (8) and the bottom of the inside of the fixed cylinder (1).

4. The sealed pneumatic rod according to claim 1, characterized in that: The bottom end of the fixed cylinder (1) is provided with an air inlet, which is connected to the inside of the air chamber (7), and an electromagnetic valve is provided on the air inlet.

5. The sealed pneumatic rod according to claim 1, characterized in that: The top of the trachea (5) is provided with a T-shaped groove (13), and the bottom of the telescopic tube (6) and the T-shaped groove (13) are matched to form a lock. The inner wall of the T-shaped groove (13) is fixed with a wear-resistant bushing, and the inner wall of the wear-resistant bushing is provided with a grease coating.

6. The sealed pneumatic rod according to claim 1, characterized in that: A telescopic spring is fixed between the bottom end of the movable end (8) and the bottom end of the air cavity (7).

7. The sealed pneumatic rod according to claim 4, characterized in that: The air inlet is also equipped with a filter assembly, which includes a metal filter screen, an activated carbon filter layer and a HEPA filter element arranged in sequence.

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