A double-acting cylinder

Abstract

This utility model discloses a double-acting cylinder, comprising a cylinder body and two air inlets on the cylinder body. The air inlets are connected to an air pipe via a connecting pipe. The air pipe is fixedly connected to the connecting pipe, and a movable sealing plate is disposed within the connecting pipe, protruding from the connecting pipe. When the connecting pipe is inserted into the air inlet, after air is supplied through the air pipe, a negative pressure is maintained between the sealing plate and the air inlet, ensuring a secure connection between the connecting pipe and the air inlet. The movable sealing plate within the connecting pipe creates a negative pressure adsorption under air pressure, causing the sealing plate to adhere tightly to the air inlet, achieving automatic locking between the air pipe and the cylinder body. After the air pipe is closed, the sealing plate no longer adheres tightly to the air inlet, enabling convenient assembly and disassembly while ensuring a durable and reliable seal.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, and in particular to a double-acting cylinder. Background Technology

[0002] Traditional double-acting cylinders often use threaded fasteners or clamp seals in their air circuit connections, which are cumbersome to install and disassemble, and prone to seal aging and failure, especially under frequent vibration conditions where they are prone to loosening and leakage. Furthermore, conventional cylinder buffers require additional hydraulic dampers or spring mechanisms, leading to structural complexity, increased costs, and limited adjustment of the buffer stroke. For bidirectional drive stability, existing designs often suffer from air pressure loss due to poor sealing between the air inlet and connecting pipe, affecting piston response efficiency. Therefore, there is an urgent need for a connection device that is stable and easy to disassemble. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a double-acting cylinder.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-acting cylinder includes a cylinder body and two air inlets on the cylinder body, wherein the air inlets are connected to an air pipe via a connecting pipe. The air tube is fixedly connected to the connecting tube. A movable sealing plate is provided in the connecting tube. The sealing plate protrudes from the connecting tube. When the connecting tube is inserted into the air inlet, after the air tube delivers air, a negative pressure is maintained between the sealing plate and the air inlet, and the connecting tube and the air inlet are securely connected.

[0005] In the above scheme, preferably, the connecting pipe includes a first pipe wall and a second pipe wall, wherein the diameter of the first pipe wall is smaller than that of the second pipe wall, and the sealing sheet is placed in the second pipe wall.

[0006] In the above scheme, preferably, a limiting tube wall for limiting the sealing sheet is provided on the other side of the second tube wall, and the diameter of the limiting tube wall is smaller than that of the second tube wall.

[0007] In the above scheme, preferably, the sealing sheet is provided with an inner hole, which is used for air passage through the trachea.

[0008] In the above scheme, it is preferred that the inner hole protrudes from the first pipe wall.

[0009] In the above scheme, it is preferred that the limiting pipe wall and the second pipe wall are connected smoothly by a slope.

[0010] In the above scheme, preferably, the air intake port is connected to the first cavity inside the cylinder.

[0011] In the above scheme, preferably, a first piston block is provided in the cylinder, the first piston is connected to the rod body, and the first piston block slides in the first cavity.

[0012] In the above scheme, preferably, the air inlet is located on both sides of the first piston block.

[0013] In the above scheme, preferably, a second cavity is provided on one side of the first cavity, and the rod passes through the first cavity and connects to the second piston block in the second cavity.

[0014] The beneficial effects of this invention are as follows: A movable sealing plate is installed inside the connecting pipe, creating negative pressure adsorption under air pressure, causing the sealing plate to adhere tightly to the air inlet, thus achieving automatic locking between the air pipe and the cylinder. After the air pipe is closed, the sealing plate no longer adheres tightly to the air inlet, ensuring convenient disassembly and assembly while maintaining a durable and reliable seal. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model.

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 for Figure 2 A sectional view along line AA.

[0018] Figure 4 This is a schematic diagram showing the connection between the connecting pipe and the air inlet of this utility model. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-4 A double-acting cylinder has a cylinder body 1 with a first cavity 11 and a second cavity 12 inside. A first piston block 13 is slidably mounted in the first cavity 11, and a second piston block 14 is slidably mounted in the second cavity 12.

[0020] The cylinder body 1 is provided with a block that separates the first cavity 11 and the second cavity 12. A rod is provided that passes through the first cavity 11, the block and the second cavity 12, that is, the rod 15 connects the first piston block 13 and the second piston block 14.

[0021] Two air inlets 2 are provided on the outer wall of the cylinder body 1, located on both sides of the movement trajectory of the first piston block 13, and both are directly connected to the first cavity 11. The air inlets 2 protrude from the cylinder body 1 so that the connecting pipe 3 can be inserted into them.

[0022] The external connector for the air intake port 2 is composed of three pipe walls arranged sequentially: a first pipe wall 5 near the cylinder block 1, a second pipe wall 6 in the middle section, and a limiting pipe wall 9 at the end, which is disposed on one side of the second pipe. A smooth bevel 10 transitions between the second pipe wall 6 and the limiting pipe wall 9. Simultaneously, the diameter of the first pipe wall 5 is smaller than that of the second pipe wall 6.

[0023] An annular sealing sheet 7 is housed within the second pipe wall 6, with a central inner hole 8 that slightly protrudes from the first pipe wall 5. The thickness of the sealing sheet 7 is less than the length of the second pipe wall 6, and a small gap is formed between its outer diameter and the second pipe wall 6. The inner diameter of the second pipe wall 6 is smaller than that of the second pipe wall 6, meaning the second pipe wall 6 is recessed, which limits the axial movement range of the sealing sheet 7.

[0024] One end of the connecting pipe 3 is fixedly equipped with an air pipe 4. When the connecting pipe 3 is inserted into the air inlet 2, the sealing element is located on the air inlet 2. When compressed air is introduced into the air pipe 4, the airflow pushes the sealing plate 7 towards the cylinder body 1, making it tightly adhere to the upper part of the air inlet 2. This achieves negative pressure adsorption of the sealing plate 7 onto the air inlet 2, thus achieving a tight connection between the connecting pipe 3 and the air inlet 2.

[0025] During operation, when compressed air enters the left side of the first chamber 11 through the left air inlet 2, it pushes the first piston block 13 to move to the right, and the gas on the right side is discharged from the right air inlet 2. At this time, the rod 15 drives the second piston block 14 to move synchronously to the right within the second chamber 12. When the air path switches to the right air inlet 2, the first piston block 13 moves to the left, achieving bidirectional drive. The second chamber 12 can be filled with a viscous fluid medium. When the second piston block 14 moves to the end of its stroke, it achieves buffered deceleration through fluid damping.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-acting cylinder, characterized in that: It includes a cylinder body (1) and two air inlets (2) provided on the cylinder body (1), the air inlets (2) being connected to an air pipe (4) via a connecting pipe (3); The air tube (4) is fixedly connected to the connecting tube (3). A movable sealing plate (7) is provided in the connecting tube (3). The sealing plate (7) protrudes from the connecting tube (3). When the connecting tube (3) is inserted into the air inlet (2), after the air tube (4) delivers air, the sealing plate (7) and the air inlet (2) maintain a negative pressure, and the connecting tube (3) and the air inlet (2) are firmly connected.

2. A double-acting cylinder according to claim 1, characterized in that: The connecting pipe (3) includes a first pipe wall (5) and a second pipe wall (6), wherein the diameter of the first pipe wall (5) is smaller than that of the second pipe wall (6), and the sealing sheet (7) is placed in the second pipe wall (6).

3. A double-acting cylinder according to claim 2, characterized in that: The second tube wall (6) is provided with a limiting tube wall (9) on the other side for limiting the sealing piece (7), and the diameter of the limiting tube wall (9) is smaller than that of the second tube wall (6).

4. A double-acting cylinder according to claim 2 or 3, characterized in that: The sealing sheet (7) is provided with an inner hole (8), which is used for air passage through the trachea (4).

5. A double-acting cylinder according to claim 4, characterized in that: The inner hole (8) is provided to protrude from the first pipe wall (5).

6. A double-acting cylinder according to claim 3, characterized in that: The limiting tube wall (9) and the second tube wall (6) are smoothly connected by a slope (10).

7. A double-acting cylinder according to claim 1, characterized in that: The air intake (2) is connected to the first cavity (11) inside the cylinder (1).

8. A double-acting cylinder according to claim 7, characterized in that: The cylinder (1) is provided with a first piston block (13), the first piston is connected to the rod (15), and the first piston block (13) slides in the first cavity (11).

9. A double-acting cylinder according to claim 7, characterized in that: The air inlet (2) is located on both sides of the first piston block (13).

10. A double-acting cylinder according to claim 8, characterized in that: A second cavity (12) is provided on one side of the first cavity (11), and the rod (15) passes through the first cavity (11) and is connected to the second piston block (14) in the second cavity (12).

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