A leak-proof quick coupling device for hydraulic cylinders

Abstract

This utility model relates to the technical field of anti-leakage quick coupling devices for hydraulic cylinders, and more particularly to an anti-leakage quick coupling device for hydraulic cylinders, comprising a male coupling body and a female coupling body. The sealing ring at the connecting end of the male coupling body is tightly fitted to the inner wall of the female coupling body, and the outer sealing ring at the connecting end of the female coupling body is tightly fitted to the outer wall of the male coupling body, forming a double sealing structure. Both the sealing ring and the outer sealing ring are made of oil-resistant rubber, effectively resisting the impact of high-pressure hydraulic oil and the corrosion of complex working environments. This design greatly reduces the risk of hydraulic oil leakage, ensuring that the hydraulic system is always in a stable working state. Taking construction machinery as an example, during long-term high-intensity operation, this coupling can effectively prevent hydraulic oil leakage, avoiding problems such as unstable system pressure and equipment failure caused by leakage, extending equipment service life, improving work efficiency, and reducing economic losses caused by maintenance and equipment replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-leakage quick coupling devices for hydraulic cylinders, and in particular to an anti-leakage quick coupling device for hydraulic cylinders. Background Technology

[0002] In industrial fields where hydraulic systems are widely used, from construction machinery to automated production lines, hydraulic cylinders, as key actuators, are crucial for their connection to pipelines. Traditional hydraulic couplings have revealed numerous problems in practical use. Their leak-proof performance is poor; due to the long-term impact of high-pressure hydraulic oil and the influence of complex working environments, leaks are prone to occur at the couplings. In construction machinery such as excavators, leaks in traditional couplings lead to hydraulic oil seepage, causing not only resource waste and environmental pollution but also potential disruptions to equipment operation due to unstable hydraulic system pressure, and even safety accidents. Furthermore, the connection and disconnection processes of traditional couplings are cumbersome and time-consuming, requiring specialized tools and operators to spend considerable time on installation and disassembly. This significantly reduces work efficiency during equipment maintenance or temporary adjustments to the hydraulic system layout. Therefore, a leak-proof quick-connect coupling device for hydraulic cylinders is proposed to solve these problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a leak-proof quick coupling device for hydraulic cylinders, which solves many problems exposed by traditional hydraulic couplings in actual use. These problems include poor leak-proof performance, and the fact that the couplings are prone to leakage due to long-term impact from high-pressure hydraulic oil and the influence of complex working environments. In construction machinery such as excavators on construction sites, leakage of traditional couplings leads to hydraulic oil seepage, which not only wastes resources and pollutes the working environment, but may also affect the normal operation of equipment due to unstable hydraulic system pressure, and even cause safety accidents.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a leak-proof quick connector device for hydraulic cylinders, comprising a male connector body and a female connector body. The outer wall of the male connector body is provided with a claw seat, and a claw is installed on the claw seat. A sealing ring is provided at the connecting end of the male connector body. A valve core seat is installed inside the female connector body, and a valve core is provided inside the valve core seat. A return spring is installed between the valve core and the valve core seat. An outer sealing ring is provided at the connecting end of the female connector body. The male connector body and the female connector body are quickly connected and separated by the claws.

[0005] A further improvement is that the claw seat has a slot for mounting the claw, the claw can move in the slot, and a spring is provided between the claw and the claw seat to push the claw to open outward.

[0006] A further improvement is that, when the male connector body and the female connector body are connected, the end of the male connector body is inserted into the female connector body, the sealing ring is tightly fitted with the inner wall of the female connector body, and the outer sealing ring is tightly fitted with the outer wall of the male connector body, thus achieving a double seal.

[0007] A further improvement is that a limiting ring is provided inside the female connector body, located outside the valve core seat, to limit the movement range of the valve core; a spring in the slot on the claw seat pushes the claw to open outward, and the claw tightly clamps the female connector body to complete the quick connection; at the same time, the sealing ring at the connecting end of the male connector body is tightly fitted with the inner wall of the female connector body, and the outer sealing ring at the connecting end of the female connector body is tightly fitted with the outer wall of the male connector body, forming a double sealing structure to effectively prevent hydraulic oil leakage.

[0008] A further improvement is that the end of the claw is provided with an inclined guide surface, which facilitates the claw to slide smoothly into the corresponding slot of the female connector body when the male connector body and the female connector body are connected.

[0009] Further improvements include the fact that both the sealing ring and the outer sealing ring are made of oil-resistant rubber, which has good sealing performance and corrosion resistance; the sealing ring at the connection end and the outer sealing ring at the connection end of the female connector body together provide double sealing protection for the connector; the valve core seat, valve core and return spring inside the female connector body cooperate with each other to control the flow and blockage of hydraulic oil, effectively improving the safety and stability of the hydraulic system and providing a more reliable connection solution for industrial production.

[0010] A further improvement is that a guide spring is provided on the outer side of the female connector body. The guide spring is used to guide the male connector body to be accurately inserted into the female connector body when the male connector body and the female connector body are connected. Dust covers are installed on the outer sides of both the male connector body and the female connector body to prevent dust and impurities from entering the connector. When it is necessary to connect the male connector body and the female connector body, the operator holds the male connector body and aligns its end with the female connector body. The guide spring on the outer side of the female connector body plays a guiding role to help the male connector body be accurately inserted. As the male connector body is gradually inserted, the claw contacts the female connector body. The inclined guide surface at the end of the claw allows it to slide smoothly into the corresponding slot of the female connector body when squeezed.

[0011] By employing the above technical solution, this utility model provides a leak-proof quick coupling device for hydraulic cylinders, which has at least the following beneficial effects:

[0012] 1. The sealing ring at the connecting end of the male connector body of this utility model is tightly fitted to the inner wall of the female connector body, and the outer sealing ring at the connecting end of the female connector body is tightly fitted to the outer wall of the male connector body, forming a double sealing structure. Both the sealing ring and the outer sealing ring are made of oil-resistant rubber, which has good sealing performance and corrosion resistance, and can effectively resist the impact of high-pressure hydraulic oil and the erosion of complex working environments. This design greatly reduces the risk of hydraulic oil leakage and ensures that the hydraulic system is always in a stable working state. Taking construction machinery as an example, during long-term high-intensity operation, this connector can effectively prevent hydraulic oil leakage, avoid problems such as unstable system pressure and equipment failure caused by leakage, extend the service life of equipment, improve work efficiency, and reduce economic losses caused by maintenance and equipment replacement.

[0013] 2. The male connector of this utility model has a claw seat on its outer wall. The claw seat has a groove that allows the claw to move flexibly, and a spring pushes the claw to open outward. When connecting, the male connector body is inserted into the female connector body, and the inclined guide surface at the end of the claw allows it to slide smoothly into the corresponding groove of the female connector body, completing a quick connection. When separating, simply press the claw inward. The guide spring on the outside of the female connector body guides the male connector body to insert accurately during connection. During equipment maintenance or temporary adjustment of the hydraulic system layout, operators can quickly connect and disconnect the connector without the need for professional tools, greatly shortening the operation time. Compared with traditional connectors, the operating efficiency is improved, significantly increasing work efficiency and providing strong support for the efficient operation of industrial production. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Male connector body; 2. Sealing ring; 3. Spring; 4. Claw seat; 5. Claw; 6. Outer sealing ring; 7. Female connector body; 8. Guide spring; 9. Sealing ring; 10. Limiting ring; 11. Dust cover; 12. Return spring; 13. Valve core seat; 14. Valve core. 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] Traditional hydraulic couplings have revealed numerous problems in practical use, exhibiting poor leak-proof performance. Due to prolonged exposure to high-pressure hydraulic oil and the influence of complex working environments, leaks are highly likely to occur at the couplings. In construction machinery such as excavators, leaks in traditional couplings lead to hydraulic oil seepage, causing not only resource waste and environmental pollution but also potential disruptions to equipment operation due to unstable hydraulic system pressure, and even safety accidents. This embodiment provides a leak-proof quick-connect coupling device for hydraulic cylinders. Please refer to... Figures 1-4This embodiment provides a leak-proof quick-connect device for hydraulic cylinders, including a male connector body 1 and a female connector body 7. The male connector body 1 has a claw seat 4 on its outer wall, and a claw 5 is mounted on the claw seat 4. A sealing ring 2 is provided at the connecting end of the male connector body 1. A valve core seat 13 is installed inside the female connector body 7, and a valve core 14 is installed inside the valve core seat 13. A return spring 12 is installed between the valve core 14 and the valve core seat 13. An outer sealing ring 6 is provided at the connecting end of the female connector body 7. The male connector body 1 and the female connector body 7 are quickly connected and separated by the claw 5. A slot for mounting the claw 5 is provided on the claw seat 4, and the claw 5 can move within the slot. A spring 3 is provided between the claw 5 and the claw seat 4, and the spring 3 is used to push the claw 5 outward. When the male connector body 1 and the female connector body 7 are connected, the end of the male connector body 1 is inserted into the female connector body 7, and the sealing ring... The male connector body 1 is tightly fitted to the inner wall of the female connector body 7, and the outer sealing ring 6 is tightly fitted to the outer wall of the male connector body 1, achieving double sealing. A limit ring 10 is provided inside the female connector body 7. The limit ring 10 is located outside the valve core seat 13 and is used to limit the movement range of the valve core 14. The end of the claw 5 is provided with an inclined guide surface, so that the claw 5 can smoothly slide into the corresponding groove of the female connector body 7 when the male connector body 1 and the female connector body 7 are connected. Both the sealing ring 2 and the outer sealing ring 6 are made of oil-resistant rubber material, which has good sealing performance and corrosion resistance. A guide spring 8 is provided on the outside of the female connector body 7. The guide spring 8 is used to guide the male connector body 1 to be accurately inserted into the female connector body 7 when the male connector body 1 and the female connector body 7 are connected. Dust covers 11 are installed on the outside of both the male connector body 1 and the female connector body 7 to prevent dust and impurities from entering the interior of the connector.

[0023] Working principle: This device, through the coordinated operation of the male connector body 1, the female connector body 7, and a series of supporting components, aims to solve the drawbacks of traditional connectors. The claw seat 4 on the outer wall of the male connector body 1 cooperates with the claw 5 to achieve quick connection and separation. The sealing ring 2 at the connection end and the outer sealing ring 6 at the connection end of the female connector body 7 together provide double sealing protection for the connector. The valve core seat 13, valve core 14, and return spring 12 inside the female connector body 7 work together to control the flow and blockage of hydraulic oil, effectively improving the safety and stability of the hydraulic system and providing a more reliable connection solution for industrial production.

[0024] When connecting the male connector body 1 and the female connector body 7, the operator holds the male connector body 1 and aligns its end with the female connector body 7. The guide spring 8 on the outside of the female connector body 7 guides the male connector body 1 to be inserted accurately. As the male connector body 1 is inserted deeper, the claw 5 contacts the female connector body 7. The inclined guide surface at the end of the claw 5 allows it to slide smoothly into the corresponding slot of the female connector body 7 when squeezed. At this time, the spring 3 in the slot on the claw seat 4 pushes the claw 5 to open outward, and the claw 5 tightly clamps the female connector body 7, completing the quick connection. At the same time, the sealing ring 2 at the connecting end of the male connector body 1 fits tightly against the inner wall of the female connector body 7, and the outer sealing ring 6 at the connecting end of the female connector body 7 fits tightly against the outer wall of the male connector body 1, forming a double sealing structure to effectively prevent hydraulic oil leakage.

[0025] When the hydraulic system is working, hydraulic oil flows in from the male connector body 1, pushing the valve core 14 inside the female connector body 7 to overcome the resistance of the return spring 12, opening the passage, and the hydraulic oil smoothly passes through the valve core seat 13 into the female connector body 7, and then flows to the hydraulic cylinder; the limiting ring 10 set inside the female connector body 7 is located outside the valve core seat 13, limiting the movement range of the valve core 14, ensuring that the valve core 14 works within the appropriate stroke, preventing its excessive movement and damage, and ensuring the stability and safety of the hydraulic oil flow;

[0026] When it is necessary to separate the male connector body 1 and the female connector body 7, the operator applies external force to press the claw 5 inward, overcoming the thrust of the spring 3, causing the claw 5 to retract; at this time, the male connector body 1 can be pulled out from the female connector body 7, completing the separation operation; the dust cover 11 installed on the outside of both the male connector body 1 and the female connector body 7 can prevent dust and impurities from entering the interior of the connector after separation, protect the sealing surface and other precision components inside the connector, extend the service life of the connector, and ensure the sealing performance and connection reliability during the next connection.

[0027] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] 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 claims and their equivalents.

Claims

1. A leak-proof quick coupling device for hydraulic cylinder comprising a male coupling body (1) and a female coupling body (7) characterized in that: The male connector body (1) is provided with a claw seat (4) on its outer wall, and a claw (5) is installed on the claw seat (4); a sealing ring (2) is provided at the connecting end of the male connector body (1); a valve core seat (13) is installed inside the female connector body (7), a valve core (14) is provided inside the valve core seat (13), and a return spring (12) is installed between the valve core (14) and the valve core seat (13); an outer sealing ring (6) is provided at the connecting end of the female connector body (7); the male connector body (1) and the female connector body (7) are quickly connected and separated by the claw (5).

2. A hydraulic cylinder anti-leakage quick coupling device according to claim 1, characterized in that: The claw seat (4) has a slot for installing the claw (5). The claw (5) can move in the slot. A spring (3) is provided between the claw (5) and the claw seat (4). The spring (3) is used to push the claw (5) to open outward.

3. A hydraulic cylinder anti-leakage quick coupling device according to claim 1, characterized in that: When the male connector body (1) and the female connector body (7) are connected, the end of the male connector body (1) is inserted into the female connector body (7), the sealing ring (2) is tightly fitted with the inner wall of the female connector body (7), and the outer sealing ring (6) is tightly fitted with the outer wall of the male connector body (1), thus achieving double sealing.

4. A hydraulic cylinder anti-leakage quick coupling device according to claim 1, characterized in that: The female connector body (7) is provided with a limiting ring (10) inside. The limiting ring (10) is located outside the valve core seat (13) and is used to limit the movement range of the valve core (14).

5. A hydraulic cylinder anti-leak quick coupling device according to claim 2, characterized in that: The end of the claw (5) is provided with an inclined guide surface, which makes it easy for the claw (5) to slide smoothly into the corresponding slot of the female connector body (7) when the male connector body (1) and the female connector body (7) are connected.

6. A hydraulic cylinder anti-leak quick coupling device according to claim 3, characterized in that: Both the sealing ring (2) and the outer sealing ring (6) are made of oil-resistant rubber, which has good sealing performance and corrosion resistance.

7. A hydraulic cylinder anti-leak quick coupling device according to claim 1, characterized in that: A guide spring (8) is provided on the outside of the female connector body (7). The guide spring (8) is used to guide the male connector body (1) to be accurately inserted into the female connector body (7) when the male connector body (1) and the female connector body (7) are connected. Dust covers (11) are installed on the outside of both the male connector body (1) and the female connector body (7) to prevent dust and impurities from entering the connector.

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