A quick connector

Abstract

The utility model discloses a quick coupling, including shell, and the locking sleeve of sliding setting in the shell, constitute the ventilation passage on the locking sleeve, its characterized in that: the shell both ends are equipped with with the locking connector and the air inlet connector of ventilation passage intercommunication respectively, the locking connector includes the guide end cover, sets up in the multiple movable clamping blocks of guide end cover and is equipped with the first elastic member between guide end cover and movable clamping block, when movable clamping block is extruded, movable clamping block slides along guide end cover, and leans on the lock -up mouth for fixed external pipeline that encloses, and when movable clamping block is far away from extruding, the first elastic member extrudes movable clamping block downward, makes it far away from guide end cover, and relatively disperses, the utility model discloses stable structure, ensure stable structure, stress uniformity, and user can complete the assembly and disassembly of external pipeline fast and stably.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting technology, and in particular to a quick coupling. Background Technology

[0002] Quick couplings in refrigeration production lines refer to pipeline connection devices used for refrigerants, nitrogen, and other gases or liquids during the production, assembly, or testing of refrigeration equipment. Their main function is to provide a quick and reliable pipeline connection method when refrigerant charging, leak detection, pressure relief, or airtightness testing is required on the refrigeration production line.

[0003] Existing quick couplings generally suffer from insufficient stability. If the locking coupling is not subjected to uneven force distribution, excessive local force may occur during the connection process, causing the locking coupling to shift or become stuck. The reset structure may be damaged, resulting in an unstable connection and potential safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a quick connector with a stable structure and uniform stress distribution, allowing users to quickly and reliably assemble and disassemble external pipelines.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quick connector, including a housing and a locking sleeve slidably disposed within the housing, wherein the locking sleeve forms a ventilation channel, characterized in that: the housing is provided with a locking connector and an air inlet connector communicating with the ventilation channel at both ends; the locking connector includes a guide end cover, a plurality of movable clamping blocks disposed within the guide end cover, and a first elastic element disposed between the guide end cover and the movable clamping blocks; when the locking sleeve presses upward against the movable clamping blocks, the movable clamping blocks slide along the guide end cover and converge to form a locking port for fixing an external pipe, and when the locking sleeve moves away from pressing the movable clamping blocks, the first elastic element presses downward against the movable clamping blocks, causing them to move away from the guide end cover and disperse relatively.

[0006] By adopting the above technical solution, the locking sleeve can move axially up and down under the action of the drive component, and with the guidance of the guide end cover, multiple movable clamping blocks can move inward or outward simultaneously, thereby achieving the locking or separation of the joint. The first elastic element provides axial reset force, providing rebound and buffer for the movable clamping blocks. In the unlocked state, the first limit block drives multiple movable clamping blocks to move downward simultaneously. Compared with setting a reset structure between multiple movable clamping blocks, it is more stable and reliable, ensuring that the pipeline can be connected and disassembled quickly and stably.

[0007] The present invention is further configured such that: the upper end of the movable clamping block is provided with a locking inclined surface inclined toward the center, and the inner wall of the guide end cover is provided with a guide inclined surface; the locking inclined surface slides along the guide inclined surface and comes together to form a locking opening.

[0008] By adopting the above technical solution, the movable clamping block can slide smoothly along the guide slope under the drive of the locking slope, making the clamping action smoother and preventing the movable clamping block from getting stuck or shifting during the force process, thereby improving stability.

[0009] The present invention is further configured such that: the outer shell is provided with a driving assembly for driving the locking sleeve to slide up and down, the driving assembly includes a handle rotatably mounted on the outer shell, and a sliding shaft inserted into the locking sleeve, wherein the handle is provided with a sliding groove, and the sliding shaft passes through the sliding groove.

[0010] By adopting the above technical solution, when the handle is rotated, the locking sleeve can be linearly pushed through the cooperation of the slide groove and the slide shaft, thus making the operation flexible and convenient.

[0011] The present invention is further configured such that: a sealing sleeve is provided between the locking sleeve and the movable clamping block, and a plurality of sealing rings are provided inside the sealing sleeve, the sealing rings abutting against the locking sleeve.

[0012] By adopting the above technical solution, the sealing sleeve abuts against the locking sleeve and the movable clamping block, and multiple sealing rings sequentially press the gap between the locking sleeve and the sealing sleeve to prevent refrigerant leakage at the connection position and improve sealing reliability.

[0013] The present invention is further configured such that: the movable clamping block is provided with a first step portion, and the sealing sleeve is provided with an upwardly extending limiting protrusion, the limiting protrusion abutting and cooperating with the first step portion.

[0014] By adopting the above technical solution, the limiting protrusion can abut against the first step during the movement of the movable clamping block, thereby limiting the movable clamping block, avoiding over-clamping of the movable clamping block, and preventing structural damage.

[0015] The present invention is further configured such that: a support base is threadedly connected to the bottom of the outer shell, and the air inlet connector is disposed on the support base.

[0016] By adopting the above technical solution, the air intake connector can be firmly installed on the support base by means of threads, which is convenient for disassembly and replacement, and can also ensure the connection strength.

[0017] The present invention is further configured such that: a limiting block is slidably disposed inside the locking sleeve, the inner cavity of the limiting block is connected to the ventilation channel, and a second elastic member is disposed between the locking sleeve and the support base, one end of the second elastic member abuts against the limiting block, and the other end of the second elastic member abuts against the outer shell, so that the limiting block always has an upward movement tendency.

[0018] By adopting the above technical solution, the limiting block provides a limit for the inserted pipe, ensuring that the pipe head abuts against the movable sleeve. Since the movable sleeve and the retaining edge form a limiting relationship, it is used to prevent the movable sleeve from disengaging from the locking sleeve.

[0019] The present invention is further configured such that: a third elastic element is provided between the locking sleeve and the outer shell, one end of the third elastic element abuts against the locking sleeve, and the other end of the third elastic element abuts against the outer shell.

[0020] By adopting the above technical solution, when the pipe is inserted, the second elastic element is compressed when the limiting block moves downward, so that the movable sleeve always has an upward tendency, making the movable sleeve firmly abut against the pipe, and ensuring the sealing between the movable sleeve and the pipe.

[0021] The present invention is further configured such that: a third elastic element is provided between the locking sleeve and the outer shell, one end of the third elastic element abuts against the locking sleeve, and the other end of the third elastic element abuts against the outer shell.

[0022] By adopting the above technical solution, the third elastic element can provide further buffer support for the locking sleeve, making the movement of the locking sleeve more stable during locking and unlocking, and effectively reducing structural damage caused by impact.

[0023] The present invention is further configured such that at least one movable clamping block is provided.

[0024] By adopting the above technical solution, multiple movable clamping blocks are evenly distributed in the circumferential direction, thereby ensuring the force balance and connection reliability during the locking process.

[0025] In summary, this utility model has the following beneficial effects: 1. The locking sleeve is driven to move up and down axially by the drive component, and the movable clamping block is guided by the guide end cover to realize clamping and separation actions. The first elastic element provides axial reset force, and the user can quickly and stably complete the assembly and disassembly of external pipelines.

[0026] 2. Multiple movable clamping blocks are evenly distributed around the circumference, and the locking slope and guide slope cooperate to ensure that the clamping force is evenly distributed around the joint, preventing excessive local stress and improving connection stability.

[0027] 3. The second and third elastic elements provide springback and buffer for the limiting block and locking sleeve, respectively, making the clamping and separation process smoother, reducing structural impact, and improving service life. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is an exploded view of this utility model.

[0030] Figure 3 This is a cross-sectional view of the present invention.

[0031] In the diagram: 1. Outer shell; 2. Locking sleeve; 21. Ventilation channel; 3. Locking connector; 4. Air inlet connector; 31. Guide end cap; 32. Movable clamping block; 33. First elastic element; 5. Drive assembly; 321. Locking inclined surface; 311. Guide inclined surface; 51. Handle; 52. Limiting block; 53. Movable sleeve; 22. Edge retainer; 521. Sliding shaft; 511. Sliding groove; 11. Clearance groove; 6. Sealing sleeve; 61. Sealing ring; 312. First step; 62. Limiting protrusion; 7. Support base; 71. Second elastic element; 72. Second step; 73. Third elastic element; 74. Third step. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figures 1 to 3 As shown, this utility model provides a quick connector, including a housing 1 and a locking sleeve 2 slidably disposed within the housing 1. The locking sleeve 2 forms a ventilation channel 21 for the smooth flow of refrigerant. A locking connector 3 and an inlet connector 4 are respectively provided at both ends of the housing 1. The locking connector 3 includes a guide end cap 31, movable clamping blocks 32, and a first elastic element 33. The locking connector 3, through the cooperation of the guide end cap 31 and multiple movable clamping blocks 32, achieves quick locking and unlocking of external pipes. At least three movable clamping blocks 32 are provided, and the movable clamping blocks 32 are circumferentially... The movable clamping blocks 32 are evenly distributed, and their opposite surfaces form a locking surface. The movable clamping blocks 32 are provided with a downward restoring force by the first elastic element 33. The upper end of the first elastic element 33 abuts against the guide end cover 31, and the lower end abuts against the movable clamping blocks 32. When the locking sleeve 2 presses the movable clamping blocks 32 upward, the movable clamping blocks 32 slide along the guide end cover 31 and come together to form a locking port for fixing the external pipe. When the locking sleeve 2 moves away from the movable clamping blocks 32, the first elastic element 33 presses the movable clamping blocks 32 downward, making them move away from the guide end cover 31 and relatively dispersed.

[0034] like Figure 3As shown, the upper end of the movable clamping block 32 is provided with a locking inclined surface 321 that is inclined towards the center, and the inner wall of the guide end cover 31 is provided with a corresponding guide inclined surface 311. The locking inclined surface 321 slides along the guide inclined surface 311 and comes together to form a locking opening, so that the clamping action is smooth and the movable clamping block 32 is prevented from jamming or shifting when subjected to force. Multiple movable clamping blocks 32 are evenly distributed in the circumference to ensure balanced clamping force, thereby ensuring reliable connection and stability of external pipeline disassembly. A sealing sleeve 6 is provided between the movable clamping block 32 and the locking sleeve 2. The movable clamping block 32 cooperates with the sealing sleeve 6. The sealing sleeve 6 is provided with multiple sealing rings 61, which can form a multi-seal structure, effectively preventing refrigerant leakage and improving the safety of the joint.

[0035] The outer casing 1 is provided with a drive assembly 5 for driving the locking sleeve 2 to slide up and down. The drive assembly 5 includes a handle 51, one end of which is rotatably connected to the outer casing 1. A sliding shaft 521 is provided on the limiting block 52, and a sliding groove 511 is provided on the handle 51. The outer casing 1 is provided with a clearance groove 11. The sliding shaft 521 passes through the clearance groove 11 and slides in cooperation with the sliding groove 511. Driven by rotating the handle 51, the limiting block 52 moves axially along the locking sleeve 2, thereby driving the locking sleeve 2 to rise and fall. The guide end cover 31 guides the movable clamping block 32 to achieve clamping or separation action.

[0036] like Figure 3 As shown, the movable clamping block 32 is also provided with a first step portion 312, and the sealing sleeve 6 is provided with an upwardly extending limiting protrusion 62, which abuts against the first step portion 312 to form a limit, preventing the movable clamping block 32 from being over-clamped and protecting the structural safety. The bottom of the outer shell is threadedly connected to a support seat 7, and the air inlet connector 4 is set on the support seat 7, which is convenient for disassembly and assembly and also ensures the connection is firm.

[0037] like Figures 1 to 3 As shown, a limiting block 52 is slidably disposed inside the locking sleeve 2, and a movable sleeve 53 is fitted on the limiting block 52. The inner cavity of the limiting block 52 is connected to the ventilation channel 21 of the locking sleeve 2. A retaining edge 22 extending towards the center is provided at one end of the locking sleeve 2 near the connector assembly. The movable sleeve 53 abuts against the retaining edge 22 to form a limiting position. A second elastic element 71 is provided between the locking sleeve 2 and the support base 7. One end of the elastic element abuts against the limiting block 52, and the other end abuts against the second step portion 72 on the support base 7. When the external pipe is inserted, the limiting block 52 moves downward. When in motion, the elastic element is compressed, providing a rebound force, so that the movable sleeve 53 always has an upward tendency. The movable sleeve 53 firmly abuts against the external pipe, ensuring good sealing. A third elastic element 73 is provided on the outside of the second elastic element 71. The diameter of the third elastic element 73 is larger than that of the second elastic element 71, and one end abuts against the locking sleeve 2, and the other end abuts against the third step portion 73 on the support seat 7. This can provide further buffer support for the locking sleeve 2, reduce the impact damage to the structure during locking and unlocking, and make the operation process more stable.

[0038] The basic working principle of this utility model is as follows: When the user inserts the external pipe into the locking connector 3, the user rotates the handle 51 upwards, causing the locking sleeve 2 to rise axially via the drive assembly 5. The third elastic element 73 provides an upward rebound force, while the first elastic element 33 is compressed. The guide slope 311 inside the guide end cover 31 guides the circumferentially distributed movable clamping blocks 32 to slide inwards. The clamping blocks move closer along the locking slope 321, thereby firmly fixing the external pipe inside the connector. When the user needs to disassemble the pipe, the user rotates the handle 51 downwards to cause the locking sleeve 2 to move downwards. As the first elastic element 33 is compressed, the third elastic element 73 provides a downward rebound force. The guide slope 311 of the guide end cap 31 guides the movable clamping block 32 to slide outward. The clamping block is dispersed along the locking slope 321. At the same time, the second elastic element 71 provides a rebound force, making it easy to pull out the pipe. Throughout the process, the handle 51 cooperates with the slide groove 511 through the sliding shaft 521. The sliding shaft 521 passes through the clearance groove 11 of the outer shell 1, and the locking sleeve 2 moves linearly along the inner edge. The operation is smooth, and the user can repeatedly complete the quick assembly and disassembly of the external pipe through the handle 51.

[0039] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A quick connector, comprising a housing (1) and a locking sleeve (2) slidably disposed within the housing (1), the locking sleeve (2) forming a ventilation channel (21), characterized in that: The outer casing (1) is provided with a locking connector (3) and an air inlet connector (4) at both ends, which are connected to the ventilation channel (21); The locking connector (3) includes a guide end cap (31), a plurality of movable clamping blocks (32) disposed in the guide end cap (31), and a first elastic member (33) disposed between the guide end cap (31) and the movable clamping blocks (32); When the locking sleeve (2) presses the movable clamping block (32) upward, the movable clamping block (32) slides along the guide end cover (31) and comes together to form a locking port for fixing the external pipe. When the locking sleeve (2) moves away from the movable clamping block (32), the first elastic element (33) presses the movable clamping block (32) downward, making it move away from the guide end cover (31) and relatively disperse.

2. A quick connector according to claim 1, characterized in that: The upper end of the movable clamping block (32) is provided with a locking inclined surface (321) that is inclined towards the center, and the inner wall of the guide end cover (31) is provided with a guide inclined surface (311). The locking inclined surface (321) slides along the guide inclined surface (311) and comes together to form a locking opening.

3. A quick connector according to claim 1, characterized in that: The outer shell (1) is provided with a drive assembly (5) for driving the locking sleeve (2) to slide up and down. The drive assembly (5) includes a handle (51) rotatably mounted on the outer shell and a sliding shaft (521) inserted into the locking sleeve (2). The handle (51) is provided with a sliding groove (511), and the sliding shaft (521) passes through the sliding groove (511).

4. A quick connector according to claim 1, characterized in that: A sealing sleeve (6) is provided between the locking sleeve (2) and the movable clamp (32), and a plurality of sealing rings (61) are provided inside the sealing sleeve (6), and the sealing rings (61) abut against the locking sleeve (2).

5. A quick connector according to claim 4, characterized in that: The movable clamp (32) is provided with a first step (312), and the sealing sleeve (6) is provided with an upwardly extending limiting protrusion (62), which abuts against the first step (312).

6. A quick connector according to claim 1, characterized in that: The bottom of the outer casing is threadedly connected to a support base (7), and the air inlet connector (4) is mounted on the support base (7).

7. A quick connector according to claim 6, characterized in that: A limiting block (52) is slidably disposed inside the locking sleeve (2). The inner cavity of the limiting block (52) is connected to the ventilation channel (21). A second elastic element (71) is provided between the locking sleeve (2) and the support base (7). One end of the second elastic element (71) abuts against the limiting block (52), and the other end of the second elastic element (71) abuts against the outer shell (1), so that the limiting block (52) always has an upward movement tendency.

8. A quick connector according to claim 7, characterized in that: The limiting block (52) is fitted with a movable sleeve (53), and the locking sleeve (2) has a stop edge (22) extending towards the center at one end near the connector assembly. The movable sleeve (53) abuts against the stop edge (22).

9. A quick connector according to claim 8, characterized in that: A third elastic element (73) is provided between the locking sleeve (2) and the outer shell. One end of the third elastic element (73) abuts against the locking sleeve (2), and the other end of the third elastic element (73) abuts against the outer shell (1).

10. A quick connector according to claim 1, characterized in that: At least three movable clamping blocks (32) are provided.

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