Pneumatic coupling

Abstract

The utility model discloses a kind of pneumatic joints, its technical solution main points include male head and female head, the male head is equipped with the sleeve shell compatible with female head, the female head is provided with connecting portion with sleeve shell, the male head outer surface is equipped with the outer groove extending to end surface, the female head end surface inside is equipped with the inner groove matched with male head, the outer groove bottom radius is less than female head inner diameter, when the male head and female head are assembled, the two grooves butt joint form the cavity with opening, the cavity is equipped with sealing assembly, the sealing assembly can be deformed and tightly adhere to cavity inner wall when being pressed. The utility model utilizes the cooperation of outer groove and inner groove, forms a cavity with opening between male head and female head, so that the pressure of medium in pipeline can directly act on sealing assembly, ensures that reliable sealing is realized under normal working conditions, and further strengthens sealing performance in high-pressure working environment, so that excellent sealing effect can be maintained under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and more specifically to a pneumatic connector. Background Technology

[0002] Currently, pneumatic couplings are quick couplings mainly used for air piping and pneumatic tools. They typically consist of a male connector, a female connector, and a housing that mates with the female connector on the outside of the male connector. These couplings allow for the connection or disconnection of pipelines without the need for tools, supplying compressed air from an air source to pneumatic tools. They are suitable for air pipelines, air compressors, grinders, air drills, impact wrenches, pneumatic screwdrivers, and other pneumatic tools.

[0003] However, the aforementioned existing technologies still have some drawbacks. Traditional connectors typically place sealing gaskets at the contact surfaces of the male and female connectors, relying on initial tightening force to achieve a seal. However, when the pressure inside the pipeline increases significantly, the sealing gaskets are prone to plastic deformation or structural damage due to excessive pressure, leading to seal failure and media leakage. Under complex operating conditions with frequent pressure fluctuations or high-pressure impacts, this static sealing structure is difficult to maintain a reliable seal continuously and may further interfere with the normal operation of pneumatic components. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a pneumatic connector.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a male head and a female head. The male head has a housing that matches the female head. The female head and the housing have a connecting portion. The outer surface of the male head has an outer groove extending to its end face. The inner side of the end face of the female head has an inner groove that matches the male head. The bottom radius of the outer groove is smaller than the inner diameter of the female head. When the male head and female head are assembled, the two grooves meet to form a cavity with an opening. A sealing component is provided inside the cavity. This sealing component can deform under pressure and fit tightly against the inner wall of the cavity.

[0006] The present invention is further configured such that: the sealing component includes a flexible block with a notch, the notch is provided with a spring sheet with a corresponding shape, and a gasket is provided near the opening of the cavity, the gasket can cause the flexible block to deform when compressed.

[0007] The present invention is further configured such that: the notch is a V-shaped notch, and the washer is provided with a protruding structure adapted to the V-shaped notch.

[0008] The present invention is further configured such that: the inner side of the washer is provided with a transition slope that mates with the inner surface of the female head.

[0009] The present invention is further configured such that: the outer surface of the female head is provided with an outer inclined surface, the outer inclined surface has an outer groove, the outer groove is provided with an elastic sealing element, and the sleeve is provided with an inner groove that cooperates with the elastic sealing element.

[0010] The present invention is further configured such that: the connecting part includes an external thread on the outer surface of the female head, and an internal thread adapted to the female head is provided on the inner surface of the sleeve.

[0011] In summary, this utility model has the following beneficial effects: by utilizing the combination of external and internal slots, a cavity with an opening is formed between the male and female connectors, allowing the pressure of the medium inside the pipeline to directly act on the sealing component. Furthermore, by employing a sealing component that can automatically adjust the sealing effect according to pressure changes, an adaptive sealing function is achieved. This ensures reliable sealing under normal operating conditions, while further enhancing the sealing performance in high-pressure operating environments, thus maintaining excellent sealing performance under different operating conditions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0013] Figure 2 This is a magnified view of part A in this embodiment;

[0014] Figure 3 This is a magnified view of part B in this embodiment;

[0015] Reference numerals: 1. Male head; 11. External groove; 12. Sealing assembly; 121. Flexible block; 1211. Notch; 1212. Spring; 122. Washer; 1221. Raised structure; 1222. Transition slope; 2. Female head; 21. Internal groove; 22. External slope; 221. Elastic seal; 23. External thread; 24. External groove; 241. Bottom slope; 3. Housing; 31. Internal groove; 32. Internal thread; 4. Cavity. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This embodiment discloses a pneumatic connector, such as Figures 1 to 3As shown, it includes a male connector 1 and a female connector 2. The male connector 1 is provided with a housing 3 that is adapted to the female connector 2. The female connector 2 and the housing 3 are provided with a connecting part. The outer surface of the male connector 1 is provided with an outer groove 11 extending to the end face. The inner side of the end face of the female connector 2 is provided with an inner groove 21 that mates with the male connector 1. The inner groove 21 and the outer groove 11 can be combined to form a cavity. The bottom radius of the outer groove 11 is smaller than the inner diameter of the female connector 2. When the male connector 1 and the female connector 2 are installed, the end faces of the male connector 1 and the female connector 2 will not be tightly connected, but there will be a gap. When the male connector 1 and the female connector 2 are assembled, the two grooves are joined to form a cavity 4 with an opening. A sealing component 12 is provided in the cavity 4. The sealing component 12 can deform and fit tightly against the inner wall of the cavity 4 when under pressure. When gas pressure is introduced, the pressure acts on the sealing component 12 through the opening, forcing it to deform and press more tightly against the inner wall of the female head 2, so that the sealing force increases with the increase of pipeline pressure, achieving a good adaptive sealing effect.

[0018] like Figure 2 As shown, the sealing assembly 12 includes a flexible block 121 with a notch 1211. A spring 1212 with a corresponding shape is provided on the notch 1211. The spring 1212 is used to press the flexible block 121 to press it against the cavity 4, thus achieving a good sealing effect. A gasket 122 is provided near the opening of the cavity 4. The gasket 122 can deform the flexible block 121 when compressed. During operation, the gas in the pipeline pushes the gasket 122. When the gasket 122 is compressed, it applies pressure to the spring 1212. The compressed spring 1212 further compresses the flexible block 121, causing it to deform and converting the axial pressure into a force that causes the flexible block 121 to expand radially outward. Therefore, the sealing force generated by the flexible block 121 increases with the increase of the gas pressure in the pipeline.

[0019] Further improvements include a V-shaped notch 1211 and a protruding structure 1221 on the gasket 122 that matches the V-shaped notch 1211. The V-shaped notch 1211 and the protruding structure 1221 (which can be considered an inverted V-shape) fit together. When the gasket 122 moves under pressure, its protruding structure 1221 makes good contact with the spring 1212, allowing the spring 1212 to effectively open and compress the flexible block 121. The protruding structure 1221 generates a very direct and powerful radial force. Under this force, the spring 1212 opens and compresses the flexible block 121, causing it to "spread out" and form good contact with the inner wall of the cavity 4. This ensures the effectiveness and consistency of deformation, avoiding leakage caused by irregular deformation. The V-shaped notch 1211 is adapted to the opening of the cavity 4, allowing the pressure on the gasket 122 to be better transmitted and converted into sealing tension.

[0020] To further improve the design, the inner side of the gasket 122 is provided with a transition slope 1222 that mates with the inner surface of the female head 2. The outer slope 22 acts as a guide plate, smoothing the airflow path, which is beneficial to the gas flow in the air passage and reduces pressure loss. At the same time, the outer slope 22 can convert axial pressure into radial pressure, so that the pressure of the medium in the pipeline can be more effectively transmitted to the flexible block 121, forming a better compression sealing effect.

[0021] like Figure 3 As shown, the outer surface of the female head 2 has an outer inclined surface 22, and the outer inclined surface 22 has an outer groove 24. An elastic sealing element 221 is provided within the outer groove 24. The housing 3 has an inner groove 31 that mates with the elastic sealing element 221. The inner groove 31 within the housing 3 and the outer groove 24 on the outer inclined surface 22 of the female head 2 form a locking groove, which, together with the elastic sealing element 221, constitutes a limiting and locking structure. The elastic sealing element 221 is first installed into the outer groove 24. When the female head 2 and the housing 3 are installed, the elastic sealing element 221 enters the inner groove 31, at which point a "click" sound is heard. This sound feedback allows for effective control of the installation position, thereby effectively controlling the preload between various components and preventing damage and failure of the seal due to excessive compression.

[0022] Further improvements include a bottom slope 241 on the outer groove, located near the male connector 1. The slope of the bottom slope 241 is greater than that of the outer slope 22. During disassembly, the bottom slope 241 abuts against the elastic seal 221, partially decomposing the axial force into a radial expansion force. Under the same axial force, the radial force generated during disassembly is much greater than that during assembly, thus preventing loosening and effectively preventing accidental loosening of the pipe joint under system pressure or vibration conditions, thereby improving the reliability of this invention.

[0023] Further improvements include an external thread 23 on the outer surface of the female head 2 and an internal thread 32 on the inner surface of the housing 3 that corresponds to the female head 2. The female head 2 and the housing are fixedly connected to each other through threaded engagement. By tightening the threads, a huge axial locking force can be generated, and the housing 3 will tightly press the male head 1 and the female head 2 together to ensure a good connection.

[0024] Working principle of this utility model

[0025] During installation, the sleeve 3 is fitted onto one side of the male head 1, the sealing component 12 is installed into the outer slot 11 of the male head 1, and the elastic seal 221 is installed into the outer groove 24. When the male head 1 is inserted into the female head 2, the sleeve 3 is rotated to engage with the female head 2. The sleeve 3 and the female head 2 are connected to each other by threads. When a "click" is heard, the elastic seal 221 engages with the inner groove 31, and the installation is completed.

[0026] In use, the outer groove 11 and the inner groove 21 form a cavity 4 with an opening. The cavity 4 is equipped with a sealing component 12. The gasket 122 abuts against the bottom surface of the inner groove 21 of the female connector 2, so that it has a good seal under normal conditions. When in use, the air pressure in the pipeline will act on the gasket 122 through the opening. The gasket 122 will transmit the pressure to the flexible block 121, so that it presses against the inner wall of the cavity 4, thereby obtaining a sealing effect that can adapt to changes in the pressure in the pipeline.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic connector, comprising a male connector (1) and a female connector (2), wherein the male connector (1) is provided with a housing (3) adapted to the female connector (2), and the female connector (2) and the housing (3) are provided with a connecting portion, characterized in that: The male head (1) has an outer groove (11) extending to the end face on its outer surface. The female head (2) has an inner groove (21) that matches the male head (1) on the inner side of its end face. The bottom radius of the outer groove (11) is smaller than the inner diameter of the female head (2). When the male head (1) and the female head (2) are assembled, the two grooves are joined together to form a cavity (4) with an opening. A sealing component (12) is provided in the cavity (4). The sealing component (12) can deform and fit tightly against the inner wall of the cavity (4) when it is under pressure.

2. A pneumatic connector according to claim 1, characterized in that: The sealing assembly (12) includes a flexible block (121) with a notch (1211), the notch (1211) is provided with a spring (1212) with a corresponding shape, and the cavity (4) is provided with a gasket (122) near the opening, the gasket (122) can deform the flexible block (121) when compressed.

3. A pneumatic connector according to claim 2, characterized in that: The notch (1211) is a V-shaped notch (1211), and the washer (122) is provided with a protruding structure (1221) that is adapted to the V-shaped notch (1211).

4. A pneumatic connector according to claim 2, characterized in that: The inner side of the washer (122) is provided with a transition slope (1222) that mates with the inner surface of the female head (2).

5. A pneumatic connector according to claim 1, characterized in that: The outer surface of the female head (2) is provided with an outer inclined surface (22), the outer inclined surface (22) has an outer groove (24), the outer groove (24) is provided with an elastic sealing element (221), and the sleeve (3) is provided with an inner groove (31) that cooperates with the elastic sealing element (221).

6. A pneumatic connector according to claim 5, characterized in that: The outer groove is provided with a bottom slope (241), which is close to the male head (1) side, and the slope of the bottom slope (241) is greater than that of the outer slope (22).

7. A pneumatic connector according to claim 1, characterized in that: The connecting part includes an external thread (23) on the outer surface of the female head (2) and an internal thread (32) on the inner surface of the casing (3) that is compatible with the female head (2).

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