One-way self-closing oil line fitting

Abstract

The utility model discloses a one -way self -closing oil circuit joint, including the joint body and sealed joint, the joint body is vertically inserted and is equipped with the butt joint lever, this butt joint lever can slide up and down along the joint body, the lower extreme of butt joint lever is with sealed joint screw connection, sealed joint installs in the lower part in the joint body, sealed joint includes the cone frustum of one -piece structure, plunger part and outer first outer hexagonal portion, the outside wall of cone frustum is seted up with first annular groove, and first sealing ring is inlayed in this first annular groove, the upper end of joint body is provided with the mounting hole, the lower extreme of joint body is provided with the oil inlet hole, the downside of mounting hole is provided with via. The utility model can solve the current automatic joint when using usually needs male and female joint pairing to realize the opening and closing of oil circuit, and this need pairing use's structure not only increases the cost, also improved the complexity of installation and maintenance problem.

Description

Technical Field

[0001] This utility model relates to the field of oil circuit connector technology, specifically a one-way self-closing oil circuit connector. Background Technology

[0002] In hydraulic systems, pressure-holding fixtures, and automated tooling, there are stringent requirements for the sealing performance, ease of operation, and cost control of hydraulic connectors. Existing connectors are complex in structure, resulting in high assembly and maintenance costs. Traditional hydraulic connectors typically require male and female fittings to open and close the hydraulic circuit, which not only increases costs but also enhances the complexity of installation and maintenance. In some single-sided operating tooling (such as hydraulic circuits in molds with single-end pressure holding) and hydraulic circuit connections in confined spaces, the lack of installation space for mating connectors and the inconvenience of operation limit the application range of automatic connectors. Therefore, a new hydraulic connector needs to be designed to meet current usage requirements. Utility Model Content

[0003] This invention provides a one-way self-closing oil circuit connector, which solves the problem that existing automatic connectors usually require male and female connectors to be matched to open and close the oil circuit. This matching structure not only increases the cost, but also increases the complexity of installation and maintenance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a one-way self-closing oil circuit connector, comprising a connector body and a sealing connector. A connecting rod is vertically inserted into the connector body, and the connecting rod can slide up and down along the connector body. The lower end of the connecting rod is threadedly connected to the sealing connector, and the sealing connector is installed in the lower part of the connector body. The sealing connector includes an integrally structured truncated cone portion, a plunger portion, and an outer first hexagonal portion. A first annular groove is formed on the outer wall of the truncated cone portion, and a first sealing ring is embedded in the first annular groove. An installation hole is provided at the upper end of the connector body, and an oil inlet hole is provided at the lower end of the connector body. A through hole is provided below the installation hole, and a conical hole corresponding to the truncated cone portion is provided between the through hole and the oil inlet hole. The first outer hexagonal portion facilitates the assembly of the connecting rod and the sealing connector. When the connecting rod is driven by a spring, it drives the sealing connector upward so that the sealing connector fits with the connector body, thus achieving oil circuit sealing. This connector can effectively complete the opening and closing of the oil circuit, reducing costs and saving time.

[0005] As a supplement to the technical solution described in this utility model, the docking rod is stepped and includes a first shaft portion, a second shaft portion, a third shaft portion, and a fourth shaft portion. The first shaft portion is inserted into the mounting hole, the second shaft portion is inserted into the through hole and slides with it, the third shaft portion is located in the through hole, and a spring is sleeved on its outer wall. One end of the spring abuts against the bottom of the through hole, and the other end abuts against the lower side of the second shaft portion. The fourth shaft portion is threadedly connected to the sealing joint. The diameter of the second shaft portion is smaller than the diameter of the first shaft portion. It is inserted into the through hole of the joint body and slides with it. It is the key part for the docking rod to slide up and down. The outer wall of the fourth shaft portion is provided with external threads and is threadedly connected to the sealing joint to realize the linkage between the docking rod and the sealing joint and ensure that the two move synchronously.

[0006] As a supplement to the technical solution described in this utility model, a third annular groove is provided on the outer side wall of the first shaft portion, and a third sealing ring is embedded in the third annular groove. The third sealing ring prevents oil leakage along the gap between the first shaft portion and the mounting hole.

[0007] As a supplement to the technical solution described in this utility model, an oil outlet hole is vertically provided in the middle of the upper end of the first shaft portion, and two cross-sections are provided opposite to each other on the outer side wall of the second shaft portion. An oil passage hole connected to the oil outlet hole is provided on the cross-section, and the oil is connected to the oil passage of the external connecting component through the oil passage hole and the oil outlet hole.

[0008] As a supplement to the technical solution described in this utility model, a second annular groove is provided on the upper end face of the first shaft portion, and a second sealing ring is embedded in the second annular groove. The second sealing ring is mainly used to enhance the sealing performance of the upper end face of the docking rod. When the docking rod is docked with the external connecting component, and the joint is in the open state, the second sealing ring can prevent oil from leaking from the contact surface between the upper end face of the docking rod and the external connecting component.

[0009] As a supplement to the technical solution described in this utility model, the upper end of the first oil outlet is provided with an internal hex wrench hole to facilitate the assembly of the connecting rod and the sealing joint.

[0010] As a supplement to the technical solution described in this utility model, the plunger part is a cylindrical structure with four oil passage planes on its outer side wall. When the connecting rod is pressed down, the oil passes through the gap between the oil passage plane and the oil inlet hole and comes to the through hole along the conical hole.

[0011] As a supplement to the technical solution described in this utility model, a retaining spring is detachably provided on the side wall of the oil inlet hole to prevent the sealing joint from falling out of the oil inlet hole.

[0012] As a supplement to the technical solution described in this utility model, a second hexagonal portion is provided on the upper outer side wall of the connector body, and a threaded connection portion is provided on the lower outer side wall of the connector body. A fourth sealing ring is sleeved on the connector body between the second hexagonal portion and the threaded connection portion. The second hexagonal portion is used for the installation of the connector body, and the connector body is fixed by the threaded connection portion.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] With its simplified structure and reliable sealing, a single connector enables the opening and closing of the oil circuit, significantly improving installation speed and reducing costs. Multiple sealing rings provide sealing at different contact surfaces, effectively preventing oil leakage and improving the overall sealing reliability of the connector. This solves the problem that existing automatic connectors typically require male and female connectors to be paired to open and close the oil circuit. This pairing-required structure not only increases costs but also raises the complexity of installation and maintenance. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is an exploded view of the present invention;

[0018] Figure 4 This is a cross-sectional view of the connector body of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the connector body of this utility model;

[0020] Figure 6 This is a three-dimensional structural diagram of the sealing joint of this utility model;

[0021] Figure 7 This is a cross-sectional view of the connecting rod of this utility model;

[0022] Figure 8 This is a three-dimensional structural diagram of the connecting rod of this utility model;

[0023] Figure 9 This is a schematic diagram of the working state of this utility model.

[0024] Figure label:

[0025] 1. Connector body; 2. Sealing connector; 3. Spring; 4. Fourth sealing ring; 5. Connecting rod; 6. Second sealing ring; 7. Third sealing ring; 8. Snap ring; 9. First sealing ring; 11. Mounting hole; 12. Oil inlet hole; 13. Through hole; 14. Tapered hole; 15. Second external hexagonal portion; 16. Threaded connection portion; 21. Frustum portion; 22. Plunger portion; 23. First external hexagonal portion; 24. First annular groove; 25. Oil passage plane; 50. Internal hexagonal wrench hole; 51. First shaft portion; 52. Second shaft portion; 53. Third shaft portion; 54. Fourth shaft portion; 55. Third annular groove; 56. Second annular groove; 57. Oil outlet hole; 58. Oil passage hole; 59. Cut surface. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] The embodiments of this utility model relate to a one-way self-closing oil circuit connector, such as... Figure 1-9 As shown, the device includes a connector body 1 and a sealing connector 2. A mating rod 5 is vertically inserted into the connector body 1, and the mating rod 5 can slide up and down along the connector body 1. The lower end of the mating rod 5 is threadedly connected to the sealing connector 2. The sealing connector 2 is installed in the lower part of the connector body 1. The sealing connector 2 includes an integrally structured frustum portion 21, a plunger portion 22, and an outer first hexagonal portion 23. A first annular groove 24 is formed on the outer wall of the frustum portion 21, and a first sealing ring 9 is embedded in the first annular groove 24. The upper end of the connector body 1 is provided with a mounting hole 11, and the lower end of the connector body 1 is provided with an oil inlet hole 12. A through hole 13 is provided on the lower side of the mounting hole 11. A tapered hole 14 corresponding to the frustum portion 21 is provided between the through hole 13 and the oil inlet hole 12. The first external hexagonal portion 23 facilitates the assembly of the connecting rod 5 and the sealing connector 2. The connecting rod 5 is driven by the spring 3 to drive the sealing connector 2 upward so that the sealing connector 2 fits with the connector body 1, thereby achieving oil circuit sealing. This connector can effectively complete the opening and closing of the oil circuit, reduce costs, and save time.

[0028] In this embodiment, as Figure 7-8As shown, the docking rod 5 is stepped and includes a first shaft portion 51, a second shaft portion 52, a third shaft portion 53, and a fourth shaft portion 54. The first shaft portion 51 is inserted into the mounting hole 11, the second shaft portion 52 is inserted into the through hole 13 and slides therewith, the third shaft portion 53 is located in the through hole 13 and a spring 3 is sleeved on its outer wall. One end of the spring 3 abuts against the bottom of the through hole 13 and the other end abuts against the lower side of the second shaft portion 52. The fourth shaft portion 54 is threaded to the sealing joint 2. The diameter of the second shaft portion 52 is smaller than the diameter of the first shaft portion 51. It is inserted into the through hole 13 of the joint body 1 and slides therewith. It is the key part for the docking rod 5 to slide up and down. The outer wall of the fourth shaft portion 54 is provided with external threads and is threaded to the sealing joint 2 to realize the linkage between the docking rod 5 and the sealing joint 2 and ensure that the two move synchronously.

[0029] In this embodiment, as Figure 1 and Figure 7 As shown, a third annular groove 55 is provided on the outer side wall of the first shaft portion 51, and a third sealing ring 7 is embedded in the third annular groove 55. The third sealing ring 7 prevents oil from leaking along the gap between the first shaft portion 51 and the mounting hole 11.

[0030] In this embodiment, as Figure 7-8 As shown, an oil outlet hole 57 is vertically arranged in the middle of the upper end of the first shaft portion 51, and two cross-sections 59 are arranged opposite each other on the outer side wall of the second shaft portion 52. An oil passage hole 58 connected to the oil outlet hole 57 is provided on the cross-section 59, and the oil is connected to the oil passage of the external connecting component through the oil passage hole 58 and the oil outlet hole 57.

[0031] In this embodiment, as Figure 1 and Figure 7 As shown, a second annular groove 56 is provided on the upper end face of the first shaft portion 51. A second sealing ring 6 is embedded in the second annular groove 56. The second sealing ring 6 is mainly used to enhance the sealing performance of the upper end face of the docking rod 5. When the docking rod 5 is docked with the external connecting component, and the joint is in the open state, the second sealing ring 6 can prevent oil from leaking from the contact surface between the upper end face of the docking rod 5 and the external connecting component.

[0032] In this embodiment, as Figure 7 As shown, the upper end of the first oil outlet 57 is provided with an internal hex wrench hole 50 to facilitate the assembly of the connecting rod 5 and the sealing joint 2.

[0033] In this embodiment, as Figure 6 As shown, the plunger part 22 has a cylindrical structure and four oil passage planes 25 are provided on its outer side wall. When the connecting rod 5 is pressed down, the oil passes through the gap between the oil passage plane 25 and the oil inlet hole 12 and comes to the through hole 13 along the tapered hole 14.

[0034] In this embodiment, as Figure 1 As shown, a retaining ring 8 is detachably provided on the side wall of the oil inlet hole 12 to prevent the sealing joint 2 from falling out of the oil inlet hole 12.

[0035] In this embodiment, as Figure 1 and Figure 5 As shown, a second hexagonal portion 15 is provided on the upper outer side wall of the connector body 1, and a threaded connection portion 16 is provided on the lower outer side wall of the connector body 1. A fourth sealing ring 4 is sleeved on the connector body 1 between the second hexagonal portion 15 and the threaded connection portion 16. The second hexagonal portion 15 is used for the installation of the connector body 1, and the connector body 1 is fixed by the threaded connection portion 16.

[0036] In this embodiment, as Figure 1 As shown, the first sealing ring 9 is embedded in the first annular groove 24 of the sealing joint 2, the third sealing ring 7 is embedded in the third annular groove 55 of the connecting rod 5, and the second sealing ring 6 is embedded in the second annular groove 56 of the connecting rod 5. The spring 3 is sleeved on the third shaft portion 53 of the connecting rod 5, with one end abutting the bottom of the through hole 13 and the other end abutting the lower side of the second shaft portion 52. The sealing joint 2 is placed in the oil inlet hole 12. The connecting rod 5 is inserted into the joint body 1 from top to bottom: the first shaft portion 51 is located in the mounting hole 11, the second shaft portion 52 is located in the through hole 13, and the second sealing ring 6 is located on the upper end face of the connecting rod 5, which is located on the outer periphery of the oil outlet hole 57. The fourth shaft portion 54 of the connecting rod 5 is connected to the sealing joint 2 through the first external hexagon portion 23 of the internal hexagon wrench hole 50. The snap ring 8 is installed on the side wall of the oil inlet hole 12. The fourth sealing ring 4 is sleeved on the joint body 1, located in the groove between the second external hexagon portion 15 and the threaded connection portion 16.

[0037] In this embodiment, as Figure 1 As shown, in the docking state, when the docking rod 5 is pressed down, the spring 3 is compressed, causing the cone portion 21 of the sealing joint 2 to move downward, so that the cone portion 21 leaves the tight fit area of ​​the conical hole 14. The oil enters from the oil inlet hole 12, flows through the oil-passing plane 25 of the plunger portion 22, passes through the gap between the cone portion 21 and the conical hole 14, and then connects to the oil outlet hole 57 through the through hole 13 and the oil passage hole 58 on the second shaft portion 52, and finally flows out from the oil outlet hole 57. In the non-docked state, the elastic force of the spring 3 pushes the docking rod 5 to move upward, and the docking rod 5 drives the cone portion 21 of the sealing joint 2 to move upward, so that its conical surface fits with the conical hole 14 of the joint body 1. The first sealing ring 9 is compressed, filling the tiny gap between the cone portion 21 and the conical hole 14, thus achieving oil circuit sealing.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A one-way self-closing oil circuit connector, comprising a connector body (1) and a sealing connector (2), characterized in that: A connecting rod (5) is vertically inserted inside the connector body (1). The connecting rod (5) can slide up and down along the connector body (1). The lower end of the connecting rod (5) is threadedly connected to the sealing connector (2). The sealing connector (2) is installed in the lower part of the connector body (1). The sealing joint (2) includes a truncated cone portion (21), a plunger portion (22), and an outer first hexagonal portion (23) of an integral structure. The outer side wall of the truncated cone portion (21) is provided with a first annular groove (24), and a first sealing ring (9) is embedded in the first annular groove (24). The upper end of the connector body (1) is provided with a mounting hole (11), the lower end of the connector body (1) is provided with an oil inlet hole (12), a through hole (13) is provided on the lower side of the mounting hole (11), and a tapered hole (14) corresponding to the frustum portion (21) is provided between the through hole (13) and the oil inlet hole (12).

2. The one-way self-closing oil circuit connector according to claim 1, characterized in that: The connecting rod (5) is stepped and includes a first shaft (51), a second shaft (52), a third shaft (53) and a fourth shaft (54). The first shaft (51) is inserted into the mounting hole (11), the second shaft (52) is inserted into the through hole (13) and slides therewith, the third shaft (53) is located in the through hole (13) and a spring (3) is sleeved on its outer wall. One end of the spring (3) abuts against the bottom of the through hole (13) and the other end abuts against the lower side of the second shaft (52). The fourth shaft (54) is threadedly connected to the sealing joint (2).

3. The one-way self-closing oil circuit connector according to claim 2, characterized in that: The outer side wall of the first shaft portion (51) is provided with a third annular groove (55), and a third sealing ring (7) is embedded in the third annular groove (55).

4. The one-way self-closing oil circuit connector according to claim 2, characterized in that: An oil outlet hole (57) is vertically provided at the upper middle part of the first shaft part (51), and two cut surfaces (59) are provided opposite to each other on the outer side wall of the second shaft part (52). An oil passage hole (58) connected to the oil outlet hole (57) is provided on the cut surface (59).

5. The one-way self-closing oil circuit connector according to claim 2, characterized in that: The upper end face of the first shaft portion (51) is provided with a second annular groove (56), and a second sealing ring (6) is embedded in the second annular groove (56).

6. The one-way self-closing oil circuit connector according to claim 4, characterized in that: The upper end of the oil outlet (57) is provided with an internal hex wrench hole (50).

7. The one-way self-closing oil circuit connector according to claim 1, characterized in that: The plunger part (22) has a cylindrical structure and four oil-passing planes (25) are provided on its outer side wall.

8. The one-way self-closing oil circuit connector according to claim 1, characterized in that: A retaining ring (8) is detachably provided on the side wall of the oil inlet (12).

9. The one-way self-closing oil circuit connector according to claim 1, characterized in that: The upper outer side wall of the connector body (1) is provided with a second hexagonal part (15), the lower outer side wall of the connector body (1) is provided with a threaded connection part (16), and a fourth sealing ring (4) is sleeved on the connector body (1) between the second hexagonal part (15) and the threaded connection part (16).

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