A large-diameter high-pressure quick hydraulic coupling

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By setting a rotating ring and a limiting block locking structure at the end of the sliding sleeve, the problem of slippage under external force in traditional high-pressure quick hydraulic joints is solved, achieving a more robust and flexible connection.

CN224516261UActive Publication Date: 2026-07-17ZHEJIANG HENGZHAN MASCH CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: ZHEJIANG HENGZHAN MASCH CO LTD
Filing Date: 2025-08-01
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

Traditional high-pressure quick hydraulic couplings are prone to steel ball slippage under external force, causing the male connector to fall out of the female connector, resulting in poor stability.

Method used

A rotating ring is set at the end of the sliding sleeve. The position of the sliding sleeve is limited by the engagement of the limiting block and the limiting groove, which prevents the sliding sleeve from sliding under the action of external force. The locking effect is improved by the engagement structure of the limiting block and the limiting groove.

Benefits of technology

It improves the robustness and flexibility of the high-pressure quick hydraulic coupling, ensuring a stable connection between the male and female couplings.

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Abstract

This utility model relates to the field of hydraulic connector technology, specifically a large-diameter, high-pressure, quick-connect hydraulic connector. It includes a female connector with a sliding sleeve slidably connected thereon and multiple steel balls slidably connected thereon. A male connector is engaged inside the female connector, with the bottom of the steel balls engaging a groove on the male connector and the top of the steel balls abutting against the sliding sleeve. A rotating ring is rotatably connected to the sliding sleeve, and two limiting blocks are fixedly connected to the inner side of the rotating ring. The female connector has two sliding grooves and a limiting groove, with the limiting blocks slidably connected to the sliding grooves. When the male connector is aligned with the port of the female connector and inserted, the sliding sleeve slides to its initial position. The sliding sleeve then moves the steel balls into the groove on the male connector, thereby locking the male and female connectors together and completing the connection. At this time, hydraulic oil can flow in the pipeline, and the limiting blocks engage with the corresponding limiting grooves, thus limiting the position of the sliding sleeve and improving its stability.

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Description

Technical Field

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[0001] The utility model relates to a high-pressure quick hydraulic joint, specifically a large-diameter high-pressure quick hydraulic joint, belonging to the technical field of hydraulic joints. Background Technique

[0002] A high-pressure quick hydraulic joint is a connecting part used in a high-pressure hydraulic system, which can achieve the quick connection and disconnection of hydraulic pipelines without the aid of complex tools. It consists of a joint body, a one-way valve spool, an outer sleeve, steel balls and other structures, and is mainly applied to equipment such as excavators, loaders, and automobiles.

[0003] However, when the traditional quick hydraulic joint is used, the male joint needs to be inserted into the female joint, and the steel ball is clamped in the groove of the male joint through the outer sleeve, so as to realize the locking of the male joint and the female joint. However, the outer sleeve is often reset under the action of spring force and presses the steel ball tightly. Furthermore, the outer sleeve is prone to move under the action of external force, causing the steel ball to slip out of the groove, resulting in the male joint falling off from the female joint, and the firmness is poor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a large-diameter high-pressure quick hydraulic joint to solve the above problems. By setting a rotating ring at the end of the sliding sleeve and making the limiting block engage with the corresponding limiting groove by rotating the rotating ring, the position of the sliding sleeve is limited, avoiding the problem that the sliding sleeve slides under the action of external force and causes the male joint to fall off, and improving the firmness.

[0005] The utility model realizes the above purpose through the following technical solutions. A large-diameter high-pressure quick hydraulic joint includes a female joint, and a docking structure is installed on the female joint. The docking structure includes a sliding sleeve, and the sliding sleeve is slidably connected to the female joint. A plurality of steel balls are slidably connected to the female joint. A male joint is clamped inside the female joint. The bottom of the steel ball is clamped in the groove on the male joint, and the top of the steel ball abuts against the sliding sleeve. A locking structure is provided on the sliding sleeve. The locking structure includes a rotating ring, and the rotating ring is rotatably connected to the sliding sleeve. Two limiting blocks are fixedly connected to the inner side of the rotating ring. Two sliding grooves are opened on the female joint, and a limiting groove is opened on the female joint. The limiting groove is communicated with the sliding groove, and the limiting block is slidably connected to the sliding groove.

[0006] Preferably, a first spring is fixedly connected between the outer wall of the sliding sleeve and the female joint, and the sliding sleeve and the rotating ring form a "convex" shape structure.

[0007] Preferably, a positioning groove is opened on the inner side of the sliding sleeve, and a positioning block is fixedly connected to the outer wall of the female joint. The positioning block is slidably connected with the positioning groove.

[0008] Preferably, both the female connector and the male connector have conical holes inside, and the multiple steel balls are arranged in a circumferential array.

[0009] Preferably, a torsion spring is fixedly connected between the end face of the sliding sleeve and the inner wall of the rotating ring, and the cross-section of the rotating ring has a U-shaped structure.

[0010] Preferably, two limiting grooves are provided at both ends of the same slide groove, and the two slide grooves are arranged symmetrically.

[0011] Preferably, both the female and male connectors are equipped with an opening and closing structure, which includes an installation ring. The inner walls of both the female and male connectors are fixedly connected to the installation ring, and the interiors of both the female and male connectors are slidably connected to a valve core. A second spring is fixedly connected between the valve core and the installation ring.

[0012] Preferably, the valve core has multiple through holes arranged in a circumferential array.

[0013] Preferably, each of the two valve cores is fixedly connected to a push rod at its end, and the two push rods abut against each other.

[0014] The beneficial effects of this utility model are as follows: a sliding sleeve is slidably connected to the female connector, and multiple steel balls are slidably connected to the female connector. A male connector is engaged inside the female connector. The bottom of the steel balls is engaged with the groove on the male connector, and the top of the steel balls abuts against the sliding sleeve. A rotating ring is rotatably connected to the sliding sleeve, and two limiting blocks are fixedly connected to the inner side of the rotating ring. Two sliding grooves are opened on the female connector, and a limiting groove is opened on the female connector. The limiting groove is connected to the sliding groove, and the limiting block is slidably connected to the sliding groove. When the male connector is aligned with the port of the female connector and inserted, after the sliding sleeve slides to the initial position, the sliding sleeve will drive the steel balls to move into the groove on the male connector, thereby locking the male connector and the female connector and completing the connection. At this time, hydraulic oil can flow in the pipeline, and the limiting block is engaged with the limiting groove at the corresponding position, which realizes the limitation of the position of the sliding sleeve and improves the firmness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the female connector and the male connector of this utility model;

[0017] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 4 for Figure 3 The diagram shows an enlarged view of section B.

[0019] In the figure: 1, female connector; 2, docking structure; 201, sliding sleeve; 202, first spring; 203, positioning groove; 204, positioning block; 205, steel ball; 206, male connector; 3, locking structure; 301, rotating ring; 302, torsion spring; 303, limiting block; 304, sliding groove; 305, limiting groove; 4, opening and closing structure; 401, mounting ring; 402, second spring; 403, valve core; 404, through hole; 405, ejector rod. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 As shown, a large-diameter high-pressure quick hydraulic connector includes a female connector 1, a docking structure 2 is installed on the female connector 1. The docking structure 2 includes a sliding sleeve 201. The sliding sleeve 201 is slidably connected to the female connector 1. A plurality of steel balls 205 are slidably connected to the female connector 1. A male connector 206 is engaged inside the female connector 1. The bottom of the steel ball 205 is engaged in a groove on the male connector 206. The top of the steel ball 205 abuts against the sliding sleeve 201. A first spring 2'02 is fixedly connected between the sliding sleeve 201 and the outer wall of the female connector 1. The sliding sleeve 201 and the rotating ring 301 form a "convex" structure. Tapered holes are provided inside both the female connector 1 and the male connector 206. The plurality of steel balls 205 are arranged in a circular array. A positioning groove 203 is provided inside the sliding sleeve 201. A positioning block 204 is fixedly connected to the outer wall of the female connector 1. The positioning block 204 is slidably connected with the positioning groove 203. Then, the rotating ring 301 is rotated in the reverse direction. The sliding sleeve 201 slides to the initial position under the reset action of the first spring 202. At this time, the positioning block 204 slides along the positioning groove 203 provided on the sliding sleeve 201, avoiding deformation of the first spring 202. When the sliding sleeve 201 slides to the initial position, the sliding sleeve 201 will drive the steel ball 205 to move into the groove inside the male connector 206, thereby locking the male connector 206 and the female connector 1 to complete the connection. At this time, hydraulic oil can flow in the pipeline, and the limiting block 303 is re-engaged with the corresponding limiting groove 305 under the action of the torsion spring 302, realizing the limitation of the position of the sliding sleeve 201 and improving the firmness.

[0022] As a technical optimization of this utility model, the sliding sleeve 201 is provided with a locking structure 3, the locking structure 3 includes a rotating ring 301, the rotating ring 301 is rotatably connected to the sliding sleeve 201, two limiting blocks 303 are fixedly connected to the inner side of the rotating ring 301, two sliding grooves 304 are opened on the female connector 1, and a limiting groove 305 is opened on the female connector 1. The limiting groove 305 communicates with the sliding groove 304, and the limiting block 303 is slidably connected to the sliding groove 304. A torsion spring 302 is fixedly connected between the end face of the sliding sleeve 201 and the inner wall of the rotating ring 301. The cross-section of the rotating ring 301 is a U-shaped structure. Two limiting grooves 305 are provided at both ends of the same sliding groove 304, and the two sliding grooves 304 are symmetrically arranged. First, the root tube is threadedly connected to the ends of the female connector 1 and the male connector 206 respectively. Then, the female connector needs to be... When the male connector 1 and the female connector 206 are connected, simply pinch the rotating ring 301 at the end of the sliding sleeve 201 and rotate the rotating ring 301. This causes the limiting block 303 on the inner side of the rotating ring 301 to slide out of the limiting groove 305. Then, pull the rotating ring 301. At this time, the rotating ring 301 drives the limiting block 303 to slide along the sliding groove 304. The rotating ring 301 drives the sliding sleeve 201 to slide towards the end. At the same time, the sliding sleeve 201 compresses the first spring 202 until the limiting block 303 slides to the other end of the sliding groove 304. At this time, the rotating ring 301 is no longer pinched. The rotating ring 301 returns to its original position under the force of the torsion spring 302. At this time, the limiting block 303 and the limiting groove 305 at the other end of the sliding groove 304 are engaged with each other, thus limiting the sliding sleeve 201. This avoids the problem of always needing to press the sliding sleeve 201 tightly when connecting the male connector 206 and the female connector 1, and improves flexibility.

[0023] As a technical optimization of this utility model, both the female connector 1 and the male connector 206 are equipped with an opening and closing structure 4. The opening and closing structure 4 includes an installation ring 401. The inner walls of both the female connector 1 and the male connector 206 are fixedly connected to the installation ring 401. A valve core 403 is slidably connected inside both the female connector 1 and the male connector 206. A second spring 402 is fixedly connected between the valve core 403 and the installation ring 401. The valve core 403 has multiple through holes 404 arranged in a circular array. A push rod 405 is fixedly connected to the ends of two valve cores 403, and the two push rods 405 abut against each other. Then, the male connector 206 is... When the female connector 1 is inserted into the male connector 206, the outer wall of the male connector 206 will abut against the steel ball 205, causing the steel ball 205 to move outward until it no longer obstructs the movement of the male connector 206. During the process of the male connector 206 being inserted into the female connector 1, the valve core 403 inside the male connector 206 will abut against another push rod 405 and the valve core 403 inside the female connector 1 through the push rod 405. When the male connector 206 is engaged in the designated position, the two valve cores 403 will move to both ends and compress the second spring 402 on the mounting ring 401, forcing the valve core 403 to leave the tapered hole and cooperate with the through hole 404 opened on the valve core 403 to make the oil circuit open.

[0024] In use, the root tube is first threadedly connected to the ends of the female connector 1 and the male connector 206 respectively. Then, the female connector 1 and the male connector 206 need to be mated together. Simply hold the rotating ring 301 at the end of the sliding sleeve 201 by hand, and then rotate the rotating ring 301 to make the limiting block 303 on the inner side of the rotating ring 301 slide out from the limiting groove 305. Then pull the rotating ring 301. At this time, the rotating ring 301 drives the limiting block 303 to slide along the sliding groove 304. The rotating ring 301 drives the sliding sleeve 201 to slide towards the end. At the same time, the sliding sleeve 201 compresses the first spring 202 until the limiting block... 303 slides to the other end of the slide groove 304. At this time, the rotating ring 301 is no longer pinched. The rotating ring 301 returns to its original position under the force of the torsion spring 302. At this time, the limiting block 303 and the limiting groove 305 at the other end of the slide groove 304 engage with each other, thus limiting the sliding sleeve 201. This avoids the problem of always needing to press the sliding sleeve 201 tightly when connecting the male connector 206 and the female connector 1, improving flexibility. Then, the male connector 206 is aligned with the port of the female connector 1 and inserted. During the insertion of the male connector 206, the outer wall of the male connector 206 will abut against the steel ball 205, causing the steel ball 205 to move outward. The male connector 206 moves until it no longer obstructs the movement of the female connector 1. During the process of inserting the male connector 206 into the female connector 1, the valve core 403 inside the male connector 206 will abut against another push rod 405 and the valve core 403 inside the female connector 1 through the push rod 405. When the male connector 206 is engaged in the designated position, the two valve cores 403 move to opposite ends and compress the second spring 402 on the mounting ring 401, forcing the valve core 403 to leave the tapered hole and cooperate with the through hole 404 on the valve core 403 to make the oil passage open. Then, the rotating ring 301 is rotated in the opposite direction, and the sliding sleeve 201 is in the first spring 20 Under the reset action of 2, it slides to the initial position, and at this time, the positioning block 204 slides along the positioning groove 203 opened on the sliding sleeve 201, which avoids the deformation of the first spring 202. When the sliding sleeve 201 slides to the initial position, the sliding sleeve 201 will drive the steel ball 205 to move into the groove on the male connector 206, thereby locking the male connector 206 and the female connector 1 to complete the connection. At this time, the hydraulic oil can flow in the pipeline, and the limiting block 303 is re-engaged with the corresponding limiting groove 305 under the action of the torsion spring 302, which realizes the limitation of the position of the sliding sleeve 201 and improves the firmness.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A large-pitch high-pressure quick hydraulic coupling comprising a female coupling (1), characterized in that: A docking structure (2) is installed on the female connector (1). The docking structure (2) includes a sliding sleeve (201). The sliding sleeve (201) is slidably connected to the female connector (1). A plurality of steel balls (205) are slidably connected to the female connector (1). A male connector (206) is snap-fitted inside the female connector (1). The bottom of the steel ball (205) is snap-fitted into a groove on the male connector (206). The top of the steel ball (205) abuts against the sliding sleeve (201). A locking structure (3) is provided on the sliding sleeve (201). The locking structure (3) includes a rotating ring (301). The rotating ring (301) is rotatably connected to the sliding sleeve (201). Two limiting blocks (303) are fixedly connected to the inner side of the rotating ring (301). Two sliding grooves (304) are formed on the female connector (1). A limiting groove (305) is formed on the female connector (1). The limiting groove (305) communicates with the sliding groove (304). The limiting block (303) is slidably connected to the sliding groove (304).

2. A large-pitch high-pressure quick hydraulic coupling according to claim 1, characterized in that: A first spring (202) is fixedly connected between the outer wall of the sliding sleeve (201) and the female connector (1). The sliding sleeve (201) and the rotating ring (301) form a "convex" structure.

3. A large-pitch high-pressure quick hydraulic coupling according to claim 2, characterized in that: A positioning groove (203) is formed inside the sliding sleeve (201). A positioning block (204) is fixedly connected to the outer wall of the female connector (1). The positioning block (204) is slidably connected to the positioning groove (203).

4. A large-pitch high-pressure quick hydraulic coupling according to claim 3, characterized in that: Tapered holes are formed inside both the female connector (1) and the male connector (206). The plurality of steel balls (205) are arranged in a circular array.

5. A large-pitch high-pressure quick hydraulic coupling according to claim 3, characterized in that: A torsion spring (302) is fixedly connected between the end face of the sliding sleeve (201) and the inner wall of the rotating ring (301). The cross-section of the rotating ring (301) is in a "concave" structure.

6. A large-pitch high-pressure quick hydraulic coupling according to claim 5, characterized in that: Two limiting grooves (305) are provided at both ends of the same sliding groove (304). The two sliding grooves (304) are symmetrically arranged.

7. A large-pitch high-pressure quick hydraulic coupling according to claim 1, characterized in that: An opening and closing structure (4) is installed inside both the female connector (1) and the male connector (206). The opening and closing structure (4) includes an installation ring (401). The inner walls of both the female connector (1) and the male connector (206) are fixedly connected with the installation ring (401). A valve core (403) is slidably connected inside both the female connector (1) and the male connector (206). A second spring (402) is fixedly connected between the valve core (403) and the installation ring (401).

8. A large-pitch high-pressure quick hydraulic coupling according to claim 7, characterized in that: A plurality of through holes (404) are formed on the valve core (403). The plurality of through holes (404) are arranged in a circular array.

9. A large-pitch high-pressure quick hydraulic coupling according to claim 8, characterized in that: Ends of the two valve cores (403) are fixedly connected with ejector rods (405). The two ejector rods (405) abut against each other.