Hydraulic quick coupling with drip prevention

Abstract

The utility model relates to hydraulic quick connector technical field discloses a prevent dripping's hydraulic quick connector. It includes the joint no. 1, the joint no. 1 inside is provided with sealing assembly, and the joint no. 1 inner wall slidingly connected has the joint no. 2, and the joint no. 1 outer wall is provided with the shell, and the shell inner wall is provided with locking assembly, and sealing assembly includes sealing ring, and sealing ring outer wall sets up in the joint no. 1 inside, and the joint no. 1 inside is provided with the connecting frame, and sealing ring outer wall slidingly connects in the connecting frame inner wall, and the connecting frame inside is provided with spring no. 2, and spring no. 2 one end fixedly connected in the connecting frame inner wall. In the utility model, through sealing ring in the connecting frame inner wall sliding, then through sealing ring to spring no. 2 compression, avoid traditional sealing structure under high pressure environment because of sealing element deformation, extrude excessively and fail, thereby make sealing ring under complex working condition long -term keep effective, prolong the maintenance cycle and the service life of joint.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic quick coupling technology, and in particular to a hydraulic quick coupling that prevents leakage. Background Technology

[0002] In many fields such as industrial production, engineering machinery, and agricultural machinery, hydraulic systems are the core devices for power transmission. Their stable operation directly affects the working efficiency and service life of equipment. Hydraulic quick couplings, as key components connecting pipelines and equipment in hydraulic systems, play an important role in quickly opening and closing oil circuits. In practical applications, the sealing performance of hydraulic quick couplings is particularly critical. Once leakage occurs, it will not only waste hydraulic oil, but also cause a drop in system pressure, affecting the normal operation of equipment, and even causing environmental pollution problems.

[0003] In existing technologies, hydraulic quick couplings used for rapid connection and disconnection of hydraulic pipelines are mostly based on simple plug-in structures. Their technical principle primarily involves initial positioning through the mating surfaces at both ends of the coupling, sealing achieved by a single seal element inside the coupling, and initial fixation through simple external clips or friction. When connection is needed, the male connector is inserted into the female connector, causing the seal element to deform and fill the mating gap to achieve a seal, while the clips or friction prevent the coupling from easily disengaging. When disconnection is needed, the clips are released or friction is overcome to pull the male connector out of the female connector.

[0004] However, existing hydraulic quick couplings have significant shortcomings in their sealing structure design. Under high pressure, the single seal in a traditional sealing structure is prone to deformation and excessive compression due to excessive pressure, leading to gaps between the seal and the mating surface of the coupling, which in turn causes hydraulic oil leakage. At the same time, during the operation of the hydraulic system, frequent fluctuations in ambient temperature and frictional heat generated by fluid flow in the pipeline can cause traditional sealing materials to harden, crack, or age due to thermal expansion and contraction, resulting in a decrease in the elasticity and sealing performance of the seal, making it impossible to maintain an effective sealing state for a long time. This seriously affects the service life and reliability of the hydraulic quick coupling. Therefore, a leak-proof hydraulic quick coupling is proposed to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a hydraulic quick coupling to prevent dripping, aiming to improve the existing technology where the sealing ring is prone to deformation and excessive compression under high pressure, leading to sealing failure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A leak-proof hydraulic quick coupling includes a first coupling, a sealing assembly inside the first coupling, a second coupling slidably connected to the inner wall of the first coupling, a housing on the outer wall of the first coupling, and a locking assembly on the inner wall of the housing; the sealing assembly includes a sealing ring, the outer wall of the sealing ring being disposed inside the first coupling, a connecting frame inside the first coupling, the outer wall of the sealing ring being slidably connected to the inner wall of the connecting frame, a second spring inside the connecting frame, one end of the second spring being fixedly connected to the inner wall of the connecting frame, the other end of the second spring being fixedly connected to the outer wall of the sealing ring, and a disassembly assembly on the outer wall of the connecting frame.

[0008] As a further description of the above technical solution: the disassembly component includes a connecting block, one end of which is fixedly connected to the outer wall of the connecting frame, a fixing groove is provided inside the connecting block, a fixing frame is slidably connected to the outer wall of the connecting block, a locking block is slidably connected to the inner wall of the fixing frame, the outer wall of the locking block is slidably connected to the inner wall of the fixing groove, a spring is provided inside the fixing frame, one end of the spring is fixedly connected to the inner wall of the fixing frame, and the other end of the spring is fixedly connected to the outer wall of the locking block.

[0009] As a further description of the above technical solution: the locking component includes a guide post, the outer wall of which is slidably connected to the inner wall of the housing, and a slot is provided inside the housing.

[0010] As a further description of the above technical solution: a fixing ring is fixedly connected to the outer wall of the guide post, and the inner wall of the fixing ring is fixedly connected to the outer wall of the second connector.

[0011] As a further description of the above technical solution: a retaining ball is slidably connected to the inner wall of the guide column, the outer wall of the retaining ball is slidably connected to the inner wall of the retaining groove, and a fixing block is fixedly connected to the inner wall of the guide column.

[0012] As a further description of the above technical solution: a sliding column is slidably connected to the inner wall of the fixed block, and a sliding block is fixedly connected to the outer wall of the sliding column.

[0013] As a further description of the above technical solution: a spring three is sleeved on the outer wall of the sliding column, one end of the spring three is fixedly connected to the outer wall of the sliding block, and the other end of the spring three is fixedly connected to the outer wall of the fixed block.

[0014] As a further description of the above technical solution: a pressing block is fixedly connected to one end of the sliding column, and a limit post is fixedly connected to the other end of the sliding column.

[0015] This utility model has the following beneficial effects:

[0016] This invention utilizes a sliding sealing ring on the inner wall of the connecting frame, which then compresses the second spring, ensuring constant contact between the sealing ring and the second connector. This prevents traditional sealing structures from failing under high pressure due to seal deformation or excessive compression, leading to hydraulic oil leakage. Furthermore, the high temperatures generated by ambient temperature fluctuations or fluid friction during hydraulic system operation cause traditional sealing materials to degrade in sealing performance due to thermal expansion and contraction. This design ensures the sealing ring remains effective under complex operating conditions, extending the maintenance cycle and service life of the connector. A ball-loaded roller slides on the inner wall of the groove, and a limiting post then limits its position, achieving a locking effect when connector one and connector two are connected. This prevents axial forces generated by vibration, tension, or fluid impact during hydraulic system operation. Without a locking mechanism, relying solely on insertion / extraction friction or seal pre-tightening force is insufficient to resist these external forces, easily leading to connector loosening. Therefore, this design ensures a stable connection under complex operating conditions such as vibration, impact, and high pressure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a hydraulic quick coupling for preventing dripping, as proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the sealing ring of a hydraulic quick connector for preventing leakage, as proposed in this utility model.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the locking block of a hydraulic quick connector for preventing dripping, as proposed in this utility model.

[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0022] Figure 6 This is a schematic diagram of the fixing ring of a hydraulic quick coupling for preventing dripping, as proposed in this utility model.

[0023] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0024] Legend:

[0025] 1. Connector 1; 2. Connector 2; 3. Outer shell; 4. Fixing frame; 5. Connecting frame; 6. Connecting block; 7. Fixing groove; 8. Locking block; 9. Spring 1; 10. Sealing ring; 11. Spring 2; 12. Fixing ring; 13. Guide post; 14. Locking ball; 15. Sliding block; 16. Sliding post; 17. Fixing block; 18. Spring 3; 19. Pressing block; 20. Limiting post; 21. Locking groove. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-3 This utility model discloses a leak-proof hydraulic quick coupling, comprising a connector 1, a sealing assembly inside the connector 1, a connector 2 slidably connected to the inner wall of the connector 1, a housing 3 on the outer wall of the connector 1, and a locking assembly on the inner wall of the housing 3; the sealing assembly includes a sealing ring 10, which enhances the sealing performance when the connector 1 and the connector 2 are connected, preventing hydraulic oil from leaking from the connection point and thus improving the leak-proof performance of the coupling; the outer wall of the sealing ring 10 is located inside the connector 1, and a connecting bracket 5 is provided inside the connector 1 for installing and fixing a spring 2 11 and the sealing ring 10 for sealing. Each component of the assembly provides a stable mounting base to ensure that the sealing assembly can function properly. The outer wall of the sealing ring 10 is slidably connected to the inner wall of the connecting frame 5. A second spring 11 is installed inside the connecting frame 5. One end of the second spring 11 is fixedly connected to the inner wall of the connecting frame 5, and the other end of the second spring 11 is fixedly connected to the outer wall of the sealing ring 10. The second spring 11 cooperates with the sealing ring 10 to perform elastic expansion and contraction. When the second connector 2 is inserted into the first connector 1, the sealing ring 10 is squeezed, and the second spring 11 is compressed, generating a reverse elastic force to push the sealing ring 10 to fit tightly against the outer wall of the second connector 2, thereby enhancing the sealing effect. A disassembly assembly is provided on the outer wall of the connecting frame 5.

[0028] Reference Figures 1-7The disassembly assembly includes a connecting block 6, one end of which is fixedly connected to the outer wall of the connecting frame 5. The connecting block 6 is used to connect the connecting frame 5 and the fixed frame 4, serving as a connection and fixation function. A fixing groove 7 is provided inside the connecting block 6. The fixing groove 7 is used to cooperate with the locking block 8 to fix the connecting block 6 and the fixed frame 4, providing a positioning and locking position for the connection between the two. The fixed frame 4 is slidably connected to the outer wall of the connecting block 6, and the locking block 8 is slidably connected to the inner wall of the fixed frame 4. The outer wall of the locking block 8 is slidably connected to the inner wall of the fixing groove 7. A spring 9 is provided inside the fixed frame 4. One end of the spring 9 is fixedly connected to the inner wall of the fixed frame 4, and the other end of the spring 9 is fixedly connected to the outer wall of the locking block 8. The locking block 8 cooperates with the fixing groove 7 to perform a locking movement. When the connecting block 6 is inserted into the fixed frame 4, the locking block 8 springs into the fixing groove 7 under the action of the spring 9, fixing the connecting block 6 and the fixed frame 4 together.When disassembly is required, pull the locking block 8 outward to disengage it from the fixing groove 7, and the connecting block 6 can be pulled out from the fixing bracket 4, achieving the effect of quick fixing and disassembly of the connecting bracket 5. When the sealing ring 10 is worn or damaged, the sealing ring 10 can be quickly replaced, achieving the effect of convenient maintenance and replacement of the sealing ring 10. The locking component includes a guide post 13, which is used to guide the insertion and removal of the second connector 2, ensuring that the second connector 2 can be accurately and smoothly connected to the first connector 1, achieving the effect of improving the accuracy and stability of the connector connection. The outer wall of the guide post 13 is slidably connected to the inner wall of the outer shell 3. The shell 3 has a slot 21 inside. A fixing ring 12 is fixedly connected to the outer wall of the guide post 13. The fixing ring 12 is used to fix the guide post 13 and the connector 2 together. The inner wall of the fixing ring 12 is fixedly connected to the outer wall of the connector 2. A retaining ball 14 is slidably connected to the inner wall of the guide post 13. The outer wall of the retaining ball 14 is slidably connected to the inner wall of the slot 21. The slot 21 is used to cooperate with the retaining ball 14 to lock the locking component and provide a locking position for the retaining ball 14. When the connector 2 is inserted into place, the retaining ball 14 is locked into the slot 21 under the action of the sliding post 16 and the limiting post 20, fixing the guide post 13 to the shell 3. Locking connector 2 to connector 1 prevents connector 2 from accidentally detaching from connector 1. A fixing block 17 is fixedly connected to the inner wall of guide post 13. A sliding post 16 is slidably connected to the inner wall of fixing block 17. A sliding block 15 is fixedly connected to the outer wall of sliding post 16. A spring 3 18 is sleeved on the outer wall of sliding post 16. One end of spring 3 18 is fixedly connected to the outer wall of sliding block 15, and the other end of spring 3 18 is fixedly connected to the outer wall of fixing block 17. In its natural state, spring 3 18 pushes sliding block 15, causing sliding post 16 to drive limiting post 20 to press against ball 14, ensuring that ball 14 can be stably locked into the slot. 21. When the pressing block 19 is pressed, the sliding column 16 compresses the spring 18, and the limiting post 20 moves away from the locking ball 14, allowing the locking ball 14 to disengage from the slot 21, thus achieving the effect of locking and unlocking. One end of the sliding column 16 is fixedly connected to the pressing block 19, which is used by the operator to press, facilitating the operator's control of the movement of the sliding column 16 and achieving the effect of convenient unlocking of the locking component. The other end of the sliding column 16 is fixedly connected to the limiting post 20, which is used to hold the locking ball 14 in place, restricting the locking ball 14 within the slot 21, ensuring the locking component is locked and achieving a stable locking effect.

[0029] The working principle of this utility model is as follows: When connector 1 and connector 2 are connected, connector 2 contacts the sealing ring 10. After connector 2 and connector 1 are fully connected, connector 2 compresses the sealing ring 10, causing it to slide against the inner wall of the connecting frame 5. The sealing ring 10 then compresses the spring 11, ensuring that the outer wall of the sealing ring 10 remains in contact with connector 2. When replacing the sealing ring 10, simply pull the connecting frame 5 outwards. This movement of the connecting frame 5 moves the connecting block 6, which in turn compresses the locking block 8. This compression causes the locking block 8 to slide against the inner wall of the fixing frame 4. The sliding of the locking block 8 compresses the spring 9, and then the locking block 8... When the sealing ring 10 slides out of the fixed groove 7, the fixing of the connecting bracket 5 is released, and the sealing ring 10 can be removed. When installing the sealing ring 10, simply slide the fixed groove 7 onto the inner wall of the fixed bracket 4, and then press it inward. The connecting block 6 squeezes the locking block 8 to make it slide onto the inner wall of the fixed bracket 4. Then, the locking block 8 slides onto the inner wall of the fixed bracket 4 to compress the spring 9. Then, the spring 9 rebounds and moves the locking block 8 into the fixed groove 7, thus completing the installation of the sealing ring 10. This avoids the failure of traditional sealing structures due to deformation and excessive compression of the sealing components under high pressure, which can lead to hydraulic oil leakage. In addition, when the hydraulic system is working, the high temperature generated by ambient temperature fluctuations or fluid friction can cause traditional sealing materials to degrade in sealing performance due to thermal expansion and contraction.

[0030] When connecting connector 1 and connector 2, first press the pressing block 19. Pressing the pressing block 19 causes the sliding post 16 to slide on the inner wall of the sliding block 15. Then, the sliding of the sliding post 16 causes the fixing block 17 to slide on the inner wall of the guide post 13. The sliding of the fixing block 17 compresses the spring 18. Then, the sliding of the sliding post 16 causes the limiting post 20 to slide. The sliding of the limiting post 20 releases the limiting of the ball 14. Finally, by sliding the guide post 13 on the inner wall of the outer shell 3, the connection between connector 1 and connector 2 is completed. After the installation of connector 1 and connector 2 is completed, the pressing block 19 is released. The spring 3 18 returns to the fixed block 17, which in turn resets the limiting post 20. The limiting post 20 then moves the locking ball 14 into the slot 21, thus locking connector 1 and connector 2. This prevents the axial force generated by the pipeline due to vibration, tension or fluid impact when the hydraulic system is working. Without a locking mechanism, it is difficult to resist these external forces by simply relying on the insertion and extraction friction or the pre-tightening force of the seal, which may easily lead to the loosening of the connector.

Claims

1. A drip-proof hydraulic quick coupling comprising a coupling part (1), characterized in that: The joint one (1) is internally provided with a sealing assembly, the inner wall of the joint one (1) is slidably connected with a joint two (2), the outer wall of the joint one (1) is provided with an outer shell (3), and the inner wall of the outer shell (3) is provided with a locking assembly; the sealing assembly comprises a sealing ring (10), the outer wall of the sealing ring (10) is arranged in the joint one (1), the joint one (1) is internally provided with a connecting frame (5), the outer wall of the sealing ring (10) is slidably connected to the inner wall of the connecting frame (5), the inner wall of the connecting frame (5) is provided with a spring two (11), one end of the spring two (11) is fixedly connected to the inner wall of the connecting frame (5), the other end of the spring two (11) is fixedly connected to the outer wall of the sealing ring (10), and the outer wall of the connecting frame (5) is provided with a dismounting assembly.

2. A drip-proof hydraulic quick coupling according to claim 1, characterized in that: The dismounting assembly comprises a connecting block (6), one end of the connecting block (6) is fixedly connected to the outer wall of the connecting frame (5), the inner wall of the connecting block (6) is provided with a fixing groove (7), the outer wall of the connecting block (6) is slidably connected with a fixing frame (4), the inner wall of the fixing frame (4) is slidably connected with a clamping block (8), the outer wall of the clamping block (8) is slidably connected to the inner wall of the fixing groove (7), and the inner wall of the fixing frame (4) is provided with a spring one (9), one end of the spring one (9) is fixedly connected to the inner wall of the fixing frame (4), and the other end of the spring one (9) is fixedly connected to the outer wall of the clamping block (8).

3. A drip-proof hydraulic quick coupling according to claim 1, characterized in that: The locking assembly comprises a guide column (13), the outer wall of the guide column (13) is slidably connected to the inner wall of the outer shell (3), and the inner wall of the outer shell (3) is provided with a clamping groove (21).

4. A drip-proof hydraulic quick coupling according to claim 3, characterized in that: The outer wall of the guide column (13) is fixedly connected with a fixed ring (12), and the inner wall of the fixed ring (12) is fixedly connected to the outer wall of the joint two (2).

5. A drip-proof hydraulic quick coupling according to claim 3 or 4, characterised in that: The inner wall of the guide column (13) is slidably connected with a clamping ball (14), the outer wall of the clamping ball (14) is slidably connected to the inner wall of the clamping groove (21), and the inner wall of the guide column (13) is fixedly connected with a fixed block (17).

6. A drip-proof hydraulic quick coupling according to claim 5, characterized in that: The inner wall of the fixed block (17) is slidably connected with a sliding column (16), and the outer wall of the sliding column (16) is fixedly connected with a sliding block (15).

7. A drip-proof hydraulic quick coupling according to claim 6, characterized in that: The outer wall of the sliding column (16) is sleeved with a spring three (18), one end of the spring three (18) is fixedly connected to the outer wall of the sliding block (15), and the other end of the spring three (18) is fixedly connected to the outer wall of the fixed block (17).

8. A drip-proof hydraulic quick coupling according to claim 6 or 7, characterised in that: One end of the sliding column (16) is fixedly connected with a pressing block (19), and the other end of the sliding column (16) is fixedly connected with a limiting column (20).

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