Quick plug connector and production die thereof

Abstract

The invention relates to a quick connector and a production mold thereof, and relates to the technical field of mechanical engineering, and the quick connector comprises a first pipeline, a second pipeline and a connecting shell made of an engineering plastic material. The corrosion resistance is improved through the connecting shell made of the engineering plastic, the connecting shell is made of the engineering plastic, a metal hoop in the prior art is replaced, and the problem of metal corrosion is solved from the material level. The hoop directly wraps the connecting end of a pipeline, does not need to be exposed to the external environment, can resist erosion of water vapor and corrosive media for a long time, ensures the stability of a connecting structure, and solves the problems of clamping force attenuation and leakage hidden danger caused by corrosion of a traditional metal hoop. Tool-free rapid operation is achieved through the limiting mechanism, and through the synergistic effect of a limiting sliding rod, a first spring and a first ball, when the connecting shell is pulled upwards, constraint of an annular limiting hole to the first ball is relieved, the first spring rebounds to drive the limiting sliding rod to be away from the second pipeline, and pipeline insertion is facilitated.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, and in particular to a quick-connect coupling and its manufacturing mold. Background Technology

[0002] In various fluid transport systems, rapid sealing connections between pipes are crucial for ensuring efficient system operation. Current technologies often rely on metal clamps for fixing pipe connections: the clamps radially tighten the connecting ends of the two pipes, using mechanical pressure to create a sealed connection. However, this method has significant drawbacks: First, the metal clamps are directly exposed to the external environment and are susceptible to corrosion from moisture and corrosive media, leading to a decrease in clamping force and causing loosening of the connection or leakage of the medium; Second, clamp installation requires the use of tools to tighten the bolts one by one, which is cumbersome and time-consuming, and parts may become stuck due to corrosion during disassembly, seriously affecting the efficiency of pipeline maintenance; Third, the stress point of traditional clamps is concentrated in a local area, which can easily cause uneven stress on the outer wall of the pipeline. Long-term use may lead to pipeline deformation or failure of the sealing surface, posing a hidden danger to the safe operation of the system. To address the aforementioned issues, the industry urgently needs a quick-connect pipe structure that can balance corrosion resistance, ease of operation, and connection stability. Meanwhile, considering the need for large-scale production of connecting components, the matching high-efficiency forming mold is also key to improving production efficiency. Based on this, the present invention proposes a quick-connect connector and its production mold, aiming to solve the pain points of the existing technology through innovative structural design. Summary of the Invention

[0003] The purpose of this application is to provide a quick-connect connector and its manufacturing mold to solve the problems in the prior art.

[0004] The quick-connector provided in this application adopts the following technical solution: it includes a first pipe, a second pipe, and a connecting shell made of engineering plastic material. The second pipe is disposed at the upper end of the first pipe. The connecting shell is disposed on the surface of the connection end of the first pipe and the second pipe. An annular plate is fixedly connected to the surface of the first pipe. An annular limiting hole and an annular groove are opened inside the connecting shell. The annular limiting hole is disposed at the upper end of the annular groove. The annular limiting hole is sloping and the diameter of the annular limiting hole gradually decreases at the end away from the annular groove. A limiting mechanism is provided at the upper end of the annular plate.

[0005] The limiting mechanism comprises multiple sets arranged in a ring at the upper end of an annular plate. Each limiting mechanism includes a fixed plate fixedly connected to the upper end of the annular plate. A limiting slide rod is slidably connected inside the fixed plate. A limiting plate is fixedly connected to the surface of the limiting slide rod. A first spring is fixedly connected to the side of the limiting plate, sleeved on the surface of the limiting slide rod with its other end fixedly connected to the side of the fixed plate. A first ball bearing is rotatably connected inside the side end of the limiting slide rod, and its side is rotatably connected inside an annular limiting hole. A telescopic rod and a second spring are fixedly connected to the lower end of the annular plate, sleeved on the surface of the telescopic rod. The lower ends of the telescopic rod and the second spring are fixedly connected to the lower surface inside an annular groove. A second ball bearing is rotatably connected to the side of the annular plate, and its rotatable connection inside the annular groove. An anti-slip pad is provided at the end of the limiting slide rod near the second pipe. A sealing sleeve is fixedly installed on the upper outer surface of the first pipe, and the inner wall of the sealing sleeve has a sealing opening adapted to the lower outer surface of the second pipe. By adopting the above technical solution and using a connecting shell made of engineering plastic, the corrosion problem of metal parts is avoided, extending the service life. The annular plate cooperates with the annular limiting hole and annular groove in the connecting shell to provide installation and movement space for the limiting mechanism. The limiting slide rod, the first spring, and the first ball in the limiting mechanism work together to achieve radial clamping of the second pipe. The telescopic rod cooperates with the second spring to provide power for the resetting of the connecting shell. The second ball reduces the friction between the annular plate and the annular groove, making the relative movement smoother. The anti-slip pad enhances the friction between the limiting slide rod and the second pipe, preventing loosening. The sealing sleeve achieves the initial seal between the first and second pipes through the sealing port. The overall structure enables quick pipe docking and reliable sealing.

[0006] Preferably, the elastic force of the second spring is much greater than that of the first spring, and the first spring is in a compressed state in its natural state. When the connecting shell is pulled upward, the connecting shell causes the annular groove to move upward relative to the annular plate, causing the telescopic rod to retract and the second spring to be compressed. At the same time, the constraint of the annular limiting hole on the first ball is released, the first spring rebounds and causes the limiting plate and the limiting slide rod to move away from the second pipe. After the connecting shell is released, the second spring resets and pushes the connecting shell downward relative to the annular plate, the telescopic rod extends accordingly, and the annular limiting hole pushes the limiting slide rod to move closer to the second pipe through the first ball. The first spring is compressed synchronously, the first ball rolls along the slope of the annular limiting hole, the inner end of the limiting slide rod abuts against the outer wall of the second pipe to achieve locking, and the second ball rolls along the inner wall of the annular groove to reduce friction. By adopting the above technical solution, the elastic force of the second spring and the first spring cooperate to ensure that the limiting slide rod automatically moves away from the pipe when the connecting shell is pulled and automatically clamps the pipe when it is released, so that the operation can be completed without tools, improving the efficiency of installation and disassembly; the first ball rolls along the inclined surface of the annular limiting hole, converting the axial movement of the connecting shell into the radial movement of the limiting slide rod, reducing mechanical wear; the second ball further reduces the frictional resistance between the annular plate and the annular groove, making the operation more labor-saving, and the spring return force ensures the stability of the clamping force, preventing the connection from loosening.

[0007] Preferably, the anti-slip pad is made of an elastic wear-resistant material with anti-slip texture on the surface, and the anti-slip texture forms an anti-slip fit when it contacts the outer wall of the second pipe; By adopting the above technical solution, the anti-slip mat uses an elastic wear-resistant material with anti-slip texture. Its anti-slip texture forms an effective anti-slip fit with the outer wall of the second pipe, increasing the contact friction and preventing the pipe from axial displacement due to vibration or fluid impact. The elastic material can adapt to the small deformation of the outer wall of the pipe, and its wear-resistant properties extend its service life.

[0008] Preferably, the inner wall of the sealing sleeve is provided with an annular sealing protrusion at the sealing opening. The annular sealing protrusion is continuously distributed along the circumference of the sealing sleeve and is tightly fitted with the outer wall of the second pipe to form multiple seals. By adopting the above technical solution, the annular sealing protrusions on the inner wall of the sealing sleeve are continuously distributed along the circumference and fit tightly with the outer wall of the second pipe to form multiple seals. Compared with a single sealing structure, this significantly improves the sealing performance of the pipe connection and effectively blocks the fluid leakage path. It is suitable for various high-pressure or easily leaking fluid transportation scenarios.

[0009] Preferably, the end of the limiting slide bar near the second pipe is arc-shaped to fit the outer wall of the pipe, the anti-slip pad is fixedly attached to the arc-shaped end face, and the thickness of the anti-slip pad is greater than the arc drop of the arc-shaped end face of the limiting slide bar. By adopting the above technical solution, the end of the limiting slide bar near the second pipe is set to be arc-shaped, which can better fit with the outer wall of the pipe and increase the contact area; the anti-slip pad is fixed to the arc-shaped end face and its thickness is greater than the arc drop, ensuring that the anti-slip pad can fully contact the outer wall of the pipe and generate deformation, further enhancing the clamping reliability and anti-slip effect.

[0010] Preferably, multiple sets of the telescopic rod and the second spring are provided and arranged in a ring at the lower end of the ring plate. The slope surface of the ring limiting hole is provided with a wear-resistant coating. The surface of the first ball is hardened. The outer wall of the connecting shell is provided with strip-shaped anti-slip ridges that are evenly distributed in the circumferential direction. The strip-shaped anti-slip ridges extend along the axial direction of the connecting shell and the height of the anti-slip ridges does not exceed one-third of the thickness of the connecting shell wall. By adopting the above technical solution, the telescopic rod and the second spring are arranged in multiple rings, so that the ring plate is subjected to uniform force and avoids deformation caused by excessive local stress; the wear-resistant coating on the slope surface of the ring limiting hole and the hardening treatment of the first ball reduce the wear during relative movement and extend the service life of the component; the strip-shaped anti-slip ridge on the outer wall of the connecting shell increases the friction during operation, making it easier to pull the connecting shell, and its height design avoids affecting the structural strength of the connecting shell.

[0011] Applied to a quick-connect connector manufacturing mold, Preferably, the system includes a worktable, a lower injection mold, and an upper injection mold. The lower injection mold has a cavity that matches the shape of the connecting shell, and the inner wall of the cavity has a sloping demolding surface corresponding to the position of the connecting shell and the annular limiting hole to accommodate the demolding requirements of the recessed structure. The lower injection mold is bolted to the upper surface of the worktable. The upper injection mold is located above the lower injection mold. Support rods are fixedly connected to the upper surface of the worktable. Two sets of support rods are symmetrically arranged on the upper surface of the worktable. Top plates are fixedly connected to the upper ends of the two sets of support rods. A first electric push rod passes through the top plate. The upper injection mold is bolted to the lower end of the output end of the first electric push rod. Support legs are fixedly connected to the lower surface of the worktable. Two sets of support legs are symmetrically arranged on the lower surface of the worktable. Base plates are fixedly connected to the lower ends of the two sets of support legs. A second electric push rod is fixedly connected to the upper surface of the base plate. A push plate is fixedly connected to the upper end of the output end of the second electric push rod. The push plate slides through the worktable and is connected to the interior of the lower injection mold. By adopting the above technical solution, the cavity in the lower injection mold that matches the connecting shell and the sloping demolding surface of the corresponding annular limiting hole can meet the demolding requirements of the recessed structure, realizing one-time molding and demolding of the connecting shell without secondary processing, thus improving production efficiency; the first electric push rod drives the upper injection mold to close, and the second electric push rod drives the push plate to eject the molded part. The automated operation reduces manual intervention and improves production stability.

[0012] Preferably, the push plate is slidably and sealingly connected inside the lower injection mold. The upper surface of the lower injection mold is provided with a positioning pin, and the lower surface of the upper injection mold is provided with a positioning hole that matches the positioning pin. The positioning pin and the positioning hole are inserted and matched to achieve mold closing positioning. By adopting the above technical solution, the push plate is slidably sealed in the lower injection mold to avoid leakage of molten material during injection; the positioning pin of the lower injection mold is inserted and matched with the positioning hole of the upper injection mold to ensure the accurate position of the cavity when the mold is closed, thereby improving the molding accuracy of the connecting shell; the push plate makes it easy to remove the molded connecting shell from the cavity, further optimizing the production process. Beneficial effects

[0013] In summary, this application includes at least one of the following beneficial technical effects: This invention provides a quick-connect coupling and its manufacturing mold. The coupling's corrosion resistance is enhanced by using an engineering plastic connecting shell, replacing the metal clamps used in existing technologies, thus avoiding metal corrosion problems at the material level. It directly wraps around the pipe connection end, eliminating exposure to the external environment and providing long-term resistance to moisture and corrosive media, ensuring the stability of the connection structure. This solves the problems of clamping force attenuation and leakage risks caused by corrosion of traditional metal clamps. A tool-free quick-operation mechanism is achieved through the synergistic action of a limiting slide rod, a first spring, and a first ball: when the connecting shell is pulled upwards, the constraint of the annular limiting hole on the first ball is released, and the first spring rebounds, moving the limiting slide rod away from the second pipe, facilitating pipe insertion; after the connecting shell is released, the second spring resets, pushing the connecting shell downwards, and the annular limiting hole, through the first ball, pushes the limiting slide rod closer to and clamps the second pipe. The entire process requires no tools; operation involves simply pulling and releasing the connecting shell, solving the problems of traditional clamps that rely on tools and are cumbersome, significantly improving installation and disassembly efficiency. A second spring and a telescopic rod ensure connection stability. The second spring's elastic force is much greater than the first spring, and in its natural state, the telescopic rod supports the relative position of the connecting shell and the annular plate. When the connecting shell is pulled, the second spring compresses and stores potential energy; after release, its restoring force ensures precise downward movement of the connecting shell, forcing the limiting slide rod to reliably clamp the pipe through the annular limiting hole, preventing loosening due to external vibrations and overcoming the shortcomings of traditional clamps that are prone to loosening due to uneven force distribution.

[0014] This invention provides a quick-connect coupling and its manufacturing mold. A first ball bearing and an annular limiting hole optimize operational smoothness. The first ball bearing is embedded in the side end of the limiting slide rod and contacts the inclined surface of the annular limiting hole. When the connecting shell moves up and down, the ball bearing rolls along the inclined surface, converting the axial movement of the connecting shell into the radial movement of the limiting slide rod. Compared to the rigid friction of traditional clamps, rolling contact significantly reduces resistance, making operation easier and preventing component wear, thus extending service life. A second ball bearing reduces relative motion friction. The second ball bearing is located between the side of the annular plate and the annular groove. When the connecting shell and the annular plate move relative to each other, the ball bearing rolls along the inner wall of the groove, converting the sliding friction between them into rolling friction, further reducing operational resistance, ensuring smooth movement of the connecting shell, and improving the user experience.

[0015] This invention provides a quick-connect coupling and its production mold. Anti-slip pads enhance clamping reliability. The anti-slip pads at the ends of the limiting slide rods are made of elastic, wear-resistant material, with surface anti-slip textures that fit tightly against the outer wall of the second pipe. When the limiting slide rods are clamped, elastic deformation increases the contact area and friction, preventing axial displacement of the pipe due to vibration or fluid impact, thus solving the pipe deformation problem caused by localized stress in traditional clamps. A sealing sleeve improves sealing performance. The annular sealing protrusion on the inner wall of the sealing sleeve fits tightly against the outer wall of the second pipe, forming a multi-layer sealing structure. Compared to the single-sided sealing of traditional clamps, this effectively blocks fluid leakage paths and enhances the sealing performance of the connection, making it suitable for various fluid transport scenarios. The sloping demolding surface of the mold improves production efficiency. The inner wall of the lower injection mold cavity has a sloping demolding surface corresponding to the annular limiting hole. After the connecting shell is injection molded, when the push plate pushes, the sloping surface guides the annular limiting hole with a concave structure to smoothly detach from the cavity, achieving one-time demolding. Compared to existing technologies that require two or more moves to detach the structure, this significantly shortens the molding cycle and improves the efficiency of large-scale production. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural schematic diagram of a quick-connect connector according to the present invention; Figure 2 This is a cross-sectional view of the original position of the sliding tube of a quick-connect connector according to the present invention; Figure 3 This is a cross-sectional view of the sliding tube of a quick-connect connector of the present invention after it has moved upward; Figure 4 This is a cross-sectional structural schematic diagram of a quick-connect connector housing according to the present invention; Figure 5 This is a three-dimensional enlarged structural schematic diagram of a quick-connect connector limiting mechanism according to the present invention; Figure 6 For the present invention Figure 2 Schematic diagram of the structure at point A; Figure 7 This is a front view structural schematic diagram of a production mold according to the present invention.

[0017] The components are as follows: 1. First pipe; 2. Second pipe; 3. Connecting shell; 4. Annular plate; 5. Annular limiting hole; 6. Annular groove; 7. Limiting mechanism; 701. Fixing plate; 702. Limiting slide rod; 703. Limiting plate; 704. First spring; 705. First ball bearing; 706. Anti-slip pad; 8. Telescopic rod; 9. Second spring; 10. Second ball bearing; 11. Sealing sleeve; 12. Workbench; 13. Lower injection mold; 14. Upper injection mold; 15. Support rod; 16. Top plate; 17. First electric push rod; 18. Support leg; 19. Base plate; 20. Second electric push rod; 21. Push plate. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0019] Example 1: A quick-connect connector, see reference Figure 2 , Figure 3 and Figure 6 It includes a first pipe 1, a second pipe 2, and a connecting shell 3 made of engineering plastic. The second pipe 2 is located at the upper end of the first pipe 1. The connecting shell 3 is located on the surface of the connection end of the first pipe 1 and the second pipe 2. An annular plate 4 is fixedly connected to the surface of the first pipe 1. An annular limiting hole 5 and an annular groove 6 are opened inside the connecting shell 3. The annular limiting hole 5 is located at the upper end of the annular groove 6. The annular limiting hole 5 is sloping and the diameter of the annular limiting hole 5 gradually decreases at the end away from the annular groove 6. A limiting mechanism 7 is provided at the upper end of the annular plate 4.

[0020] Multiple sets of limiting mechanisms 7 are arranged in a ring on the upper end of the annular plate 4. Each limiting mechanism 7 includes a fixed plate 701, which is fixedly connected to the upper end of the annular plate 4. A limiting slide rod 702 is slidably connected inside the fixed plate 701. A limiting plate 703 is fixedly connected to the surface of the limiting slide rod 702. A first spring 704 is fixedly connected to the side of the limiting plate 703, sleeved on the surface of the limiting slide rod 702, with its other end fixedly connected to the side of the fixed plate 701. A first ball bearing 705 is rotatably connected inside the side end of the limiting slide rod 702, and its side is rotatably connected to the inside of the annular limiting hole 5. A telescopic rod 8 and a second spring 9 are fixedly connected to the lower end of the annular plate 4, sleeved on the surface of the telescopic rod 8. The lower ends of the telescopic rod 8 and the second spring 9 are fixedly connected to the lower surface inside the annular groove 6. A second ball bearing 10 is rollably connected to the side of the annular plate 4, rolling inside the annular groove 6. The limiting slide rod 702 is close to the second pipe 2. An anti-slip pad 706 is provided at one end. A sealing sleeve 11 is fixedly installed on the outer surface of the upper end of the first pipe 1. The inner wall of the sealing sleeve 11 has a sealing port that matches the outer surface of the lower end of the second pipe 2. By using a connecting shell 3 made of engineering plastic, the problem of metal parts corrosion is avoided, and the service life is extended. The annular plate 4 cooperates with the annular limiting hole 5 and the annular groove 6 in the connecting shell 3 to provide installation and movement space for the limiting mechanism 7. The limiting slide rod 702, the first spring 704 and the first ball 705 in the limiting mechanism 7 work together to achieve radial clamping of the second pipe 2. The telescopic rod 8 cooperates with the second spring 9 to provide power for the reset of the connecting shell 3. The second ball 10 reduces the friction between the annular plate 4 and the annular groove 6, making the relative movement smoother. The anti-slip pad 706 enhances the friction between the limiting slide rod 702 and the second pipe 2 to prevent loosening. The sealing sleeve 11 achieves the initial seal between the first pipe 1 and the second pipe 2 through the sealing port. The overall structure realizes quick pipe docking and reliable sealing.

[0021] Reference Figure 1 , Figure 2 and Figure 3 The elastic force of the second spring 9 is much greater than that of the first spring 704, and the first spring 704 is in a compressed state under natural conditions. When the connecting shell 3 is pulled upward, the connecting shell 3 causes the annular groove 6 to move upward relative to the annular plate 4, causing the telescopic rod 8 to retract and the second spring 9 to be compressed. At the same time, the constraint of the annular limiting hole 5 on the first ball 705 is released, the first spring 704 rebounds and causes the limiting plate 703 and the limiting slide rod 702 to move away from the second pipe 2. After the connecting shell 3 is released, the second spring 9 returns to its original position and pushes the connecting shell 3 downward relative to the annular plate 4. The telescopic rod 8 extends accordingly, and the annular limiting hole 5 pushes the limiting slide rod 702 to move closer to the second pipe 2 through the first ball 705. The first spring 704 is compressed synchronously, and the first ball 705 rolls along the slope of the annular limiting hole 5. The inner end of the limiting slide rod 702 abuts against the outer wall of the second pipe 2 to achieve locking, and the second ball 10 rolls along the inner wall of the annular groove 6 to reduce friction. The anti-slip pad 706 adopts a surface... Made of elastic wear-resistant material with anti-slip texture, the anti-slip texture forms an anti-slip fit when in contact with the outer wall of the second pipe 2. The elastic force of the second spring 9 and the first spring 704 ensures that the limiting slide rod 702 automatically moves away from the pipe when the connecting shell 3 is pulled and automatically clamps the pipe when released, allowing the operation to be completed without tools and improving the efficiency of installation and disassembly. The first ball 705 rolls along the inclined surface of the annular limiting hole 5, converting the axial movement of the connecting shell 3 into the radial movement of the limiting slide rod 702, reducing mechanical wear. The second ball 10 further reduces the frictional resistance between the annular plate 4 and the annular groove 6, making the operation more effortless, and the spring return force ensures the stability of the clamping force and avoids loosening of the connection. The anti-slip pad 706 is made of elastic wear-resistant material with anti-slip texture, and its anti-slip texture forms an effective anti-slip fit with the outer wall of the second pipe 2, increasing the contact friction and preventing the pipe from axial displacement due to vibration or fluid impact. The elastic material can adapt to the small deformation of the outer wall of the pipe, and its wear-resistant properties extend its service life.

[0022] Reference Figure 2 , Figure 4 and Figure 5The inner wall of the sealing sleeve 11 has an annular sealing protrusion at the sealing opening. The annular sealing protrusion is continuously distributed around the circumference of the sealing sleeve 11 and fits tightly against the outer wall of the second pipe 2 to form multiple seals. The end of the limiting slide rod 702 near the second pipe 2 is arc-shaped to fit the outer wall of the pipe. The anti-slip pad 706 is fixedly attached to the arc-shaped end face, and the thickness of the anti-slip pad 706 is greater than the arc drop of the arc-shaped end face of the limiting slide rod 702. Multiple sets of telescopic rods 8 and second springs 9 are provided and are arranged in a ring at the lower end of the annular plate 4. The slope surface of the annular limiting hole 5 is coated with a wear-resistant coating. The surface of the first ball 705 is hardened. The outer wall of the connecting shell 3 has strip-shaped anti-slip ridges that are evenly distributed around the circumference. The strip-shaped anti-slip ridges extend axially along the connecting shell 3 and the height of the anti-slip ridges does not exceed one-third of the wall thickness of the connecting shell 3. The annular sealing protrusions on the inner wall of the sealing sleeve 11 are continuously distributed around the circumference and fit tightly against the outer wall of the second pipe 2 to form multiple seals. Compared to a single sealing structure, this design significantly improves the sealing performance of pipe connections, effectively blocking fluid leakage paths. It is suitable for various high-pressure or easily leaking fluid transportation scenarios. The end of the limiting slide bar 702 near the second pipe 2 is arc-shaped, allowing it to better fit against the outer wall of the pipe and increase the contact area. The anti-slip pad 706 is fixed to the arc-shaped end face and its thickness is greater than the arc drop, ensuring that the anti-slip pad 706 can fully contact the outer wall of the pipe and deform, further enhancing the clamping reliability and anti-slip effect. The telescopic rod 8 and the second spring 9 are arranged in multiple rings, making the annular plate 4 uniformly stressed and avoiding excessive local stress that could lead to deformation. The wear-resistant coating on the slope surface of the annular limiting hole 5 and the hardening treatment of the first ball 705 reduce wear during relative movement and extend the life of the components. The strip-shaped anti-slip ridge on the outer wall of the connecting shell 3 increases the friction during operation, making it easier to pull the connecting shell 3, and its height design avoids affecting the structural strength of the connecting shell 3.

[0023] This application also discloses a quick-connect fitting production mold, which is applicable to one of the quick-connect fittings described above. Reference Figure 7The system includes a worktable 12, a lower injection mold 13, and an upper injection mold 14. The lower injection mold 13 has a cavity that matches the shape of the connecting shell 3, and the inner wall of the cavity has a sloping demolding surface corresponding to the positions of the connecting shell 3 and the annular limiting hole 5 to accommodate the demolding requirements of the recessed structure. The lower injection mold 13 is bolted to the upper surface of the worktable 12. The upper injection mold 14 is located above the lower injection mold 13. Support rods 15 are fixedly connected to the upper surface of the worktable 12. Two sets of support rods 15 are symmetrically arranged on the upper surface of the worktable 12. On the surface, a top plate 16 is fixedly connected to the upper ends of two sets of support rods 15. A first electric push rod 17 is inserted inside the top plate 16. The upper injection mold 14 is bolted to the lower end of the output end of the first electric push rod 17. Support legs 18 are fixedly connected to the lower surface of the worktable 12. Two sets of support legs 18 are symmetrically arranged on the lower surface of the worktable 12. A base plate 19 is fixedly connected to the lower ends of the two sets of support legs 18. A second electric push rod 20 is fixedly connected to the upper surface of the base plate 19. A push plate 21 is fixedly connected to the upper end of the output end of the second electric push rod 20. The push plate 21 is slidably connected to the lower injection mold 13 through the worktable 12. The upper injection mold 14 has a positioning pin on its upper surface and a positioning hole on its lower surface that matches the positioning pin. The positioning pin and the positioning hole are inserted to achieve mold closing and positioning. The cavity inside the lower injection mold 13 that matches the connecting shell 3 and the corresponding sloping demolding surface of the annular limiting hole 5 can accommodate the demolding requirements of recessed structures, achieving one-time molding and demolding of the connecting shell 3 without secondary processing, thus improving production efficiency. The first electric push rod 17 drives the upper injection mold 14 to close, and the second electric push rod 20 drives the push plate 21 to eject the molded part. The automated operation reduces manual intervention and improves production stability. The push plate 21 is slidably and sealingly connected in the lower injection mold 13 to avoid leakage of molten material during injection. The positioning pin of the lower injection mold 13 is engaged with the positioning hole of the upper injection mold 14 to ensure accurate cavity position when the mold is closed and improve the molding accuracy of the connecting shell 3. The setting of the push plate 21 makes it easy to remove the molded connecting shell 3 from the cavity, further optimizing the production process.

[0024] The implementation principle of this application embodiment is as follows: the second pipe 2 is placed on the upper end of the first pipe 1, and the connecting shell 3 is sleeved on the surface of the connecting end of the two pipes; the second spring 9 is in a naturally extended state, the first spring 704 is in a compressed state, and the limiting slide rod 702 keeps in contact with the outer wall of the second pipe 2 under the preload of the first spring 704; when the connecting shell 3 is pulled upward, the connecting shell 3 drives the annular groove 6 to move upward relative to the annular plate 4, the telescopic rod 8 retracts and the second spring 9 is compressed; at the same time, the constraint of the annular limiting hole 5 on the first ball 705 is released, and the first spring 704 rebounds. The limiting plate 703 and the limiting slide rod 702 are moved away from the second pipe 2, releasing the clamping on the second pipe 2, allowing the second pipe 2 to be removed from the upper end of the first pipe 1; after the connecting shell 3 is released, the second spring 9 returns to its original position and pushes the connecting shell 3 downward relative to the annular plate 4, causing the telescopic rod 8 to extend accordingly; the annular limiting hole 5 pushes the limiting slide rod 702 towards the second pipe 2 through the first ball 705, and the first spring 704 is compressed synchronously, while the first ball 705 rolls along the slope surface of the annular limiting hole 5; finally, the inner end of the limiting slide rod 702... The anti-slip pad 706 abuts against the outer wall of the second pipe 2 to achieve a tight fit, and the second ball 10 rolls along the inner wall of the annular groove 6 to reduce friction; the sealing sleeve 11 at the upper end of the first pipe 1 fits tightly against the outer wall of the second pipe 2 through the annular sealing protrusion on the inner wall to form multiple seals and prevent fluid leakage; the lower injection mold 13 is fixed to the worktable 12 by bolts, and the upper injection mold 14 is installed at the output end of the first electric push rod 17; the positioning pin on the upper surface of the lower injection mold 13 is inserted into the positioning hole on the lower surface of the upper injection mold 14 to achieve mold closing positioning; the first electric push rod The first electric push rod 17 drives the upper injection mold 14 to move downward, closing with the lower injection mold 13 to form a closed cavity; molten material is injected into the cavity, and the inner wall of the cavity is provided with a sloping demolding surface corresponding to the position of the connecting shell 3 and the annular limiting hole 5, which is adapted to the molding requirements of the recessed structure; after injection molding is completed, the first electric push rod 17 drives the upper injection mold 14 to move upward to open the mold; the second electric push rod 20 drives the push plate 21 to move upward, and the push plate 21 passes through the worktable 12 to push the molded connecting shell 3 in the lower injection mold 13, and uses the sloping demolding surface of the cavity to guide the connecting shell 3 to detach from the cavity, completing the one-time demolding.

Claims

1. A quick-connect fitting, comprising a first conduit (1), a second conduit (2), and a connecting shell (3) made of engineering plastic, characterized in that: The second pipe (2) is located at the upper end of the first pipe (1), and the connecting shell (3) is located on the surface of the connecting end of the first pipe (1) and the second pipe (2). An annular plate (4) is fixedly connected to the surface of the first pipe (1). An annular limiting hole (5) and an annular groove (6) are provided inside the connecting shell (3). The annular limiting hole (5) is located at the upper end of the annular groove (6). The annular limiting hole (5) is sloped, and the diameter of the annular limiting hole (5) gradually decreases at the end away from the annular groove (6). A limiting mechanism (7) is provided at the upper end of the annular plate (4). The limiting mechanism (7) is provided in multiple sets and arranged in a ring on the upper end of the annular plate (4). The limiting mechanism (7) includes a fixed plate (701), which is fixedly connected to the upper end of the annular plate (4). A limiting slide rod (702) is slidably connected inside the fixed plate (701). A limiting plate (703) is fixedly connected to the surface of the limiting slide rod (702). A first spring (704) is fixedly connected to the side of the limiting plate (703). The first spring (704) is sleeved on the surface of the limiting slide rod (702) and its other end is fixedly connected to the side of the fixed plate (701). A first ball (705) is rotatably connected inside the side end of the limiting slide rod (702). The side of the first ball (705) is rotatably connected to... Inside the annular limiting hole (5), the lower end of the annular plate (4) is fixedly connected to a telescopic rod (8) and a second spring (9). The second spring (9) is sleeved on the surface of the telescopic rod (8). The lower ends of the telescopic rod (8) and the second spring (9) are fixedly connected to the lower surface inside the annular groove (6). The side of the annular plate (4) is rolled with a second ball (10). The second ball (10) is rolled inside the annular groove (6). The limiting slide rod (702) is provided with an anti-slip pad (706) near the end of the second pipe (2). A sealing sleeve (11) is fixedly installed on the upper outer surface of the first pipe (1). The inner wall of the sealing sleeve (11) is provided with a sealing port that matches the lower outer surface of the second pipe (2).

2. A quick-connect connector according to claim 1, characterized in that: The elastic force of the second spring (9) is much greater than that of the first spring (704), and the first spring (704) is in a compressed state in its natural state; when the connecting shell (3) is pulled upward, the connecting shell (3) causes the annular groove (6) to move upward relative to the annular plate (4), causing the telescopic rod (8) to contract and the second spring (9) to be compressed. At the same time, the constraint of the annular limiting hole (5) on the first ball (705) is released, the first spring (704) rebounds and causes the limiting plate (703) and the limiting slide rod (702) to move away from the second pipe (2); the connection is released. After the shell (3) is closed, the second spring (9) resets and pushes the connecting shell (3) to move down relative to the annular plate (4). The telescopic rod (8) extends accordingly. The annular limiting hole (5) pushes the limiting slide rod (702) to move closer to the second pipe (2) through the first ball (705). The first spring (704) is compressed synchronously. The first ball (705) rolls along the slope of the annular limiting hole (5). The inner end of the limiting slide rod (702) abuts against the outer wall of the second pipe (2) to achieve locking. The second ball (10) rolls along the inner wall of the annular groove (6) to reduce friction.

3. A quick-connect connector according to claim 1, characterized in that: The anti-slip mat (706) is made of elastic wear-resistant material with anti-slip texture on the surface, and the anti-slip texture forms an anti-slip fit when it comes into contact with the outer wall of the second pipe (2).

4. A quick-connect connector according to claim 1, characterized in that: The inner wall of the sealing sleeve (11) is provided with an annular sealing protrusion at the sealing opening. The annular sealing protrusion is continuously distributed along the circumference of the sealing sleeve (11) and is tightly fitted with the outer wall of the second pipe (2) to form multiple seals.

5. A quick-connect connector according to claim 1, characterized in that: The end of the limiting slide bar (702) near the second pipe (2) is arc-shaped and adapted to the outer wall of the pipe. The anti-slip pad (706) is fixedly attached to the arc-shaped end face, and the thickness of the anti-slip pad (706) is greater than the arc drop of the arc-shaped end face of the limiting slide bar (702).

6. A quick-connect connector according to claim 1, characterized in that: Multiple sets of the telescopic rod (8) and the second spring (9) are provided and arranged in a ring at the lower end of the ring plate (4). The slope surface of the ring limiting hole (5) is provided with a wear-resistant coating. The surface of the first ball (705) is hardened. The outer wall of the connecting shell (3) is provided with strip-shaped anti-slip ridges evenly distributed in the circumferential direction. The strip-shaped anti-slip ridges extend along the axial direction of the connecting shell (3) and the height of the anti-slip ridges does not exceed one-third of the wall thickness of the connecting shell (3).

7. A quick-connect coupling production mold according to any one of claims 1-6, comprising a workbench (12), a lower injection mold (13), and an upper injection mold (14), characterized in that: The lower injection mold (13) has a cavity that matches the shape of the connecting shell (3), and the inner wall of the cavity has a sloping demolding surface corresponding to the position of the connecting shell (3) and the annular limiting hole (5) to adapt to the demolding requirements of the recessed structure. The lower injection mold (13) is bolted to the upper surface of the worktable (12). The upper injection mold (14) is set on the upper end of the lower injection mold (13). The upper surface of the worktable (12) is fixedly connected to a support rod (15). There are two sets of support rods (15) symmetrically arranged on the upper surface of the worktable (12). The upper ends of the two sets of support rods (15) are fixedly connected to a top plate (16). The first electric push rod (17) is installed inside. The upper injection mold (14) is installed at the lower end of the output end of the first electric push rod (17) by bolts. The lower surface of the worktable (12) is fixedly connected to the support leg (18). There are two sets of support legs (18) symmetrically arranged on the lower surface of the worktable (12). The lower ends of the two sets of support legs (18) are fixedly connected to the base plate (19). The upper surface of the base plate (19) is fixedly connected to the second electric push rod (20). The upper end of the output end of the second electric push rod (20) is fixedly connected to the push plate (21). The push plate (21) passes through the worktable (12) and is slidably connected inside the lower injection mold (13).

8. A quick-connect coupling production mold according to claim 7, characterized in that: The push plate (21) is slidably and sealed inside the lower injection mold (13). The upper surface of the lower injection mold (13) is provided with a positioning pin, and the lower surface of the upper injection mold (14) is provided with a positioning hole that matches the positioning pin. The positioning pin and the positioning hole are inserted and matched to achieve mold closing and positioning.

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