Hydraulic quick connector

Abstract

The utility model provides a hydraulic quick connector, and belongs to the technical field of hydraulic connectors. The hydraulic quick connector solves the problem that in the prior art, leakage is prone to occurring due to insufficient sealing performance of a hydraulic quick connector. The ball valve comprises a plug, a socket, a locking sleeve, a first valve element and a second valve element, a first containing cavity is formed in the plug, a plurality of holes distributed in the circumferential direction are formed in the position, close to the end, of the plug, balls are installed in the holes, an installation face is formed on the surface, at the inner side ends of the holes, of the plug, and a first compression spring is fixedly arranged at the outer end of the installation face in a sleeved mode. A first connecting step is formed in the first containing cavity, a second connecting step is formed in the first valve element, a second containing cavity is formed in the socket, a third connecting step is formed in the second containing cavity, a third connecting step is formed in the second valve element, and a limiting clamping ring is formed in the locking sleeve. And the locking sleeve sleeves the outer side of the plug, and the limiting snap ring is in contact with the outer side of the ball. The sealing device has the advantages of being high in sealing performance and not prone to leakage.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic coupling technology and relates to a hydraulic quick coupling. Background Technology

[0002] Hydraulic quick couplings are devices that enable the rapid connection and disconnection of hydraulic pipelines, and are widely used in many fields such as engineering machinery, mining equipment, and agricultural machinery.

[0003] Chinese patent publication number CN204879207U discloses a hydraulic quick connector, including a female connector, a male connector, and a fixing sleeve. The fixing sleeve is located on the outside of the female connector, and a ball bearing is provided on the inside of the fixing sleeve. The fixing sleeve facilitates the connection and sealing of the female and male connectors. The fixing sleeve is threadedly connected to the female connector through the ball bearing, and the female connector is threadedly connected to the male connector through the fixing sleeve. A valve core 1 is provided inside the female connector. Valve core 1 and valve core 2 can control the on / off state of the hydraulic quick connector. A valve core 2 is provided inside the male connector. Valve core 1 and valve core 2 are arranged correspondingly. A compression spring 1 is provided on the outside of valve core 1, and a compression spring 2 is provided on the outside of valve core 2. A hexagonal internal thread interface 1 is provided on one side of the female connector, and a hexagonal internal thread interface 2 is provided on one side of the male connector.

[0004] The patented hydraulic quick coupling uses only compression spring one and compression spring two for sealing, which can easily lead to leakage problems in high-pressure and high-frequency connection scenarios. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a hydraulic quick coupling.

[0006] The objective of this utility model can be achieved through the following technical solution: A hydraulic quick connector includes a plug, a socket, a locking sleeve, a first valve core, and a second valve core. The plug has a cylindrical structure and a first receiving cavity is formed inside the plug. A limiting platform is formed in the middle of the plug. Several circumferentially arranged openings are formed near the end of the plug. Ball bearings are installed in the openings. A mounting surface is formed on the surface of the plug at the inner end of the openings. A first compression spring is fixedly fitted on the outer end of the mounting surface. A first connecting step is formed in the first receiving cavity. A second connecting step is formed in the first valve core. The first connecting step and the second connecting step are connected to install the first valve core inside the first receiving cavity. A second receiving cavity is formed inside the socket. A third connecting step is formed in the second receiving cavity. A third connecting step is formed in the second valve core. The third connecting step and the fourth connecting step are connected to install the second valve core inside the second receiving cavity. A limiting retaining ring is formed inside the locking sleeve. The locking sleeve is fitted on the outside of the plug, and the limiting retaining ring is in contact with the outside of the ball bearing.

[0007] In the aforementioned hydraulic quick coupling, a second compression spring and a third compression spring are respectively fitted and fixed to the outside of the first valve core and the second valve core.

[0008] In the aforementioned hydraulic quick connector, a first sealing groove is provided near the end of the plug, a first sealing ring is installed in the first sealing groove, and a second sealing ring is fixedly installed between the end of the locking sleeve and the outer surface of the plug.

[0009] In the aforementioned hydraulic quick coupling, threaded holes are provided at the ends of the first and second receiving cavities, and second and third sealing grooves are respectively provided at the inner ends of the threaded holes. Third sealing rings and fourth sealing rings are respectively installed in the second and third sealing grooves.

[0010] In the aforementioned hydraulic quick coupling, the locking sleeve has a concave structure in the middle, and anti-slip textures are formed on the two outer surfaces of the locking sleeve.

[0011] Compared with the prior art, the hydraulic quick connector provided by this utility model has the following beneficial effects: 1. A first sealing groove and a first sealing ring are set near the end of the plug, which can effectively prevent external impurities from entering the interior of the connector and prevent internal hydraulic oil from leaking from the joint between the plug and the socket; a second sealing ring is installed between the end of the locking sleeve and the outer surface of the plug, which further enhances the sealing performance at the connection between the locking sleeve and the plug; 2. A second sealing groove and a third sealing groove are respectively set in the threaded holes at the ends of the first and second receiving cavities, and a third sealing ring and a fourth sealing ring are installed, which ensures the sealing performance of the connection between the connector and the hydraulic pipeline. The multiple sealing structure greatly improves the overall sealing performance of the connector; 3. A second compression spring and a third compression spring are respectively fitted and fixed on the outside of the first and second valve cores. When the connector is separated, the compression spring pushes the valve core to fit tightly against the internal channel port of the connector, realizing the sealing at the valve core, which further ensures that there is no hydraulic oil leakage when the connector is disconnected. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0015] In the diagram: 1. Plug; 11. First receiving cavity; 12. Limiting platform; 13. Opening; 14. Mounting surface; 15. First compression spring; 16. First connecting step; 17. First sealing groove; 18. First sealing ring; 19. Second sealing groove; 10. Third sealing ring; 2. Socket; 21. Second receiving cavity; 22. Third connecting step; 23. Third sealing groove; 24. Fourth sealing ring; 3. Locking sleeve; 31. Limiting retaining ring; 32. Second sealing ring; 33. Concave structure; 34. Anti-slip texture; 4. First valve core; 41. Second connecting step; 42. Second compression spring; 5. Second valve core; 51. Fourth connecting step; 52. Third compression spring; 6. Ball bearing. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3 As shown, this embodiment includes a plug 1, a socket 2, a locking sleeve 3, a first valve core 4, and a second valve core 5. The plug 1 has a cylindrical structure and a through first receiving cavity 11. A limiting platform 12 is integrally formed in the middle of the plug 1 to limit the movement. Several circumferentially evenly arranged openings 13 are formed near the end of the plug 1. Ball bearings 6 are installed in the openings 13 to cooperate with the locking sleeve 3 to achieve connection and locking. A mounting surface 14 is formed on the surface of the plug 1 at the inner end of the opening 13. A first compression spring 15 is sleeved and fixed on the outer end of the mounting surface 14. The first compression spring 15 fits against the side end face of the limiting platform 12 to provide elastic support for related components. A first connecting step 16 is integrally formed in the first receiving cavity 11. A second connecting step 41 is formed in the first valve core 4. The first connecting step 16 and the second connecting step 41 are adapted to each other to connect the first valve core 4 to securely install it inside the first receiving cavity 11.

[0018] like Figures 1 to 3 As shown, the socket 2 has a second receiving cavity 21 inside, and a third connecting step 22 is integrally formed in the second receiving cavity 21. The second valve core 5 has a fourth connecting step 51. With the adaptive connection of the third connecting step 22 and the fourth connecting step 51, the second valve core 5 is installed inside the second receiving cavity 21. The locking sleeve 3 has a limit ring 31 integrally formed inside. The locking sleeve 3 is sleeved on the outside of the plug 1, and the limit ring 31 is in contact with the outside of the ball 6, so as to realize the locking function of the connection between the plug 1 and the socket 2.

[0019] To elaborate further, such as Figures 1 to 3As shown, a second compression spring 42 and a third compression spring 52 are respectively fitted and fixed on the outside of the first valve core 4 and the second valve core 5. During the connection and disconnection of the plug 1 and the socket 2, the first valve core 4 and the second valve core 5 assist the first valve core 4 and the second valve core 5 in realizing the on-off control of the oil circuit and ensuring the sealing effect. A first sealing groove 17 is opened near the end of the plug 1, and a first sealing ring 18 is installed in the first sealing groove 17. A second sealing ring 32 is fixedly installed between the end of the locking sleeve 3 and the outer surface of the plug 1. The double sealing structure improves the sealing performance of the joint and prevents hydraulic oil leakage. Threaded holes are opened at the ends of the first receiving cavity 11 and the second receiving cavity 21, and a second sealing groove 19 and a third sealing groove 23 are opened at the inner ends of the threaded holes, respectively. A third sealing ring 10 and a fourth sealing ring 24 are installed in the second sealing groove 19 and the third sealing groove 23, respectively, to enhance the sealing of the connection between the joint and the external pipeline.

[0020] To elaborate further, such as Figure 3 As shown, the locking sleeve 3 has a concave structure 33 in the middle, which facilitates operation while ensuring structural strength. The two outer ends of the locking sleeve 3 have anti-slip textures 34 to increase friction and make it easier for users to rotate the locking sleeve 3 to connect or disconnect, thus improving the ease of operation.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A hydraulic quick coupling comprising a plug (1), a socket (2), a locking sleeve (3), a first spool (4) and a second spool (5), the plug (1) being in the shape of a cylinder and having a first accommodating cavity (11) formed inside the plug (1), characterized in that: A limiting platform (12) is formed in the middle of the plug (1). Several circumferentially arranged openings (13) are provided near the end of the plug (1). A ball bearing (6) is installed in the opening (13). A mounting surface (14) is formed on the surface of the plug (1) at the inner end of the opening (13). A first compression spring (15) is sleeved and fixed on the outer end of the mounting surface (14). A first connecting step (16) is formed in the first receiving cavity (11). A second connecting step (41) is provided in the first valve core (4). The first connecting step (16) and the second connecting step (41) are connected to make the first valve core (4)... A valve core (4) is installed inside the first receiving cavity (11). The socket (2) has a second receiving cavity (21) inside. A third connecting step (22) is formed in the second receiving cavity (21). The second valve core (5) has a third connecting step (22). The third connecting step (22) and the fourth connecting step (51) are connected to make the second valve core (5) installed inside the second receiving cavity (21). A limiting ring (31) is formed inside the locking sleeve (3). The locking sleeve (3) is sleeved on the outside of the plug (1) and the limiting ring (31) is in contact with the outside of the ball (6).

2. A hydraulic quick coupling according to claim 1, characterised in that: The first valve core (4) and the second valve core (5) are respectively fitted with a second compression spring (42) and a third compression spring (52).

3. A hydraulic quick coupling according to claim 1, characterized in that: The plug (1) has a first sealing groove (17) near its end, and a first sealing ring (18) is installed in the first sealing groove (17). A second sealing ring (32) is fixedly installed between the end of the locking sleeve (3) and the outer surface of the plug (1).

4. A hydraulic quick coupling according to claim 1, characterized in that: The first receiving cavity (11) and the second receiving cavity (21) are both provided with threaded holes at their ends, and the inner ends of the threaded holes are respectively provided with a second sealing groove (19) and a third sealing groove (23). A third sealing ring (10) and a fourth sealing ring (24) are respectively installed in the second sealing groove (19) and the third sealing groove (23).

5. A hydraulic quick coupling according to claim 1, characterized in that: The locking sleeve (3) has a concave structure (33) in the middle, and anti-slip textures (34) are formed on the two outer surfaces of the locking sleeve (3).

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