A lubricating oil feeding structure of an oil-electric hydraulic quick connector

Abstract

The utility model discloses an oil electricity liquid quick connector lubricating oil oil supply structure belongs to oil electricity liquid quick connector technical field, solves the problem that the existing connector disconnects easily and leaks. It includes lubricating oil plug and lubricating oil socket, the lubricating oil channel II in be equipped with check valve, the lubricating oil channel I be equipped with slide valve, the lubricating oil plug of lubricating oil channel I outside is respectively set up and returns the oil channel and oil channel I, the both ends of oil channel I are respectively set up and the oil inlet and oil outlet of lubricating oil channel I intercommunication, the slide valve includes reset spring I and valve core I, the valve core I sliding installation is in lubricating oil channel I, reset spring I installs in lubricating oil channel I one side of valve core I, the valve core I is set up and returns the oil channel II in. The utility model discloses an oil electricity liquid quick connector lubricating oil oil supply structure, forms two independent physical sealing barriers of before and after at the disconnecting point, ensures that the system is under the connection and disconnects state and is all no leakage.

Description

Technical Field

[0001] This utility model relates to the field of oil-hydraulic quick connector technology, and more specifically, it relates to a lubrication oil supply structure for an oil-hydraulic quick connector. Background Technology

[0002] Hydraulic-electric quick connectors are connectors in which a plug and a socket are mated together and secured by a hydraulic cylinder, pneumatic cylinder, or screw, enabling communication of lubricating oil, electrical components, and hydraulic fluid. For example, CN 120351399 A discloses a multi-channel hydraulic-electric quick synchronization connector.

[0003] Currently, the lubrication circuits of hydraulic quick-connect couplings mostly employ a single sealing method, such as a one-way valve only at the socket end. This approach has inherent drawbacks: the valve is prone to wear and jamming due to frequent insertion and removal or when the oil contains impurities, leading to continuous leakage of lubricating oil from the interface after the connector is disconnected. This not only causes waste but also pollutes the equipment and the environment. Some existing improved structures attempt to enhance sealing through complex multi-stage sealing or manual locking, but these result in bulky and cumbersome operation, making it difficult to achieve synchronous control for rapid insertion and removal, thus affecting overall efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art. The purpose of this utility model is to provide a lubrication oil supply structure for an oil-electric-hydraulic quick connector, which forms two independent physical sealing barriers at the disconnection point to ensure that the system has no leakage in both the connected and disconnected states.

[0005] The technical solution of this utility model is as follows: a lubrication oil supply structure for an oil-hydraulic quick connector includes a lubrication oil plug and a lubrication oil socket. The lubrication oil plug has a lubrication oil passage I, and the lubrication oil socket has a lubrication oil passage II. A one-way valve is provided in lubrication oil passage II, and a slide valve is provided in lubrication oil passage I. An oil passage I and a return oil passage are respectively provided inside the lubrication oil plug outside lubrication oil passage I. An oil inlet and an oil outlet communicating with lubrication oil passage I are respectively provided at both ends of the oil passage I. The slide valve includes a return spring I and a valve core I. The valve core I is slidably installed in lubrication oil passage I, and the return spring I is installed in the valve... In the lubricating oil passage I on one side of the valve core I, an oil passage II is formed inside the valve core I. The end of the return oil passage near the valve core I is connected to the lubricating oil passage I through the return oil port. When the lubricating oil plug is connected to the lubricating oil socket, the valve core I moves towards the return spring I and squeezes the return spring I. The two ends of the oil passage II are connected to the oil outlet and the lubricating oil passage II respectively. The valve core I blocks the return oil port. When the lubricating oil plug is separated from the lubricating oil socket, the valve core I moves away from the return spring I to the side where its end protrudes outside the docking end of the lubricating oil plug. The valve core I blocks the oil outlet.

[0006] As a further improvement, the slide valve also includes a valve body I, which is threadedly connected to one end of the lubricating oil plug, and the valve core I is slidably inserted into the valve body I.

[0007] Furthermore, the valve core I is composed of an integral piston and a spindle. The piston is slidably installed in the lubricating oil passage I, and the spindle is slidably installed in the valve body I. The diameter of the piston is larger than the diameter of the spindle, and the oil passage II is located on the spindle near one end of the piston.

[0008] Furthermore, the piston outer wall is provided with at least one mounting groove, and a sealing ring is installed in the mounting groove.

[0009] Furthermore, a mounting groove is provided on the end face of the valve core I away from the reset spring I, and a sealing ring is installed in the mounting groove.

[0010] Furthermore, the one-way valve is threadedly connected to the mating end of the lubricating oil socket, and the one-way valve is connected to the lubricating oil passage II.

[0011] Furthermore, the one-way valve includes a valve core II, a valve body II, and a return spring II. The valve body II is threadedly connected to the lubricating oil socket. An oil passage III is formed inside the valve body II. A connecting oil passage is formed inside the valve core II, connecting its middle outer wall with its tail end face. The valve core II and the return spring II are sequentially arranged in the oil passage III along the lubricating oil flow direction. A detachable limiting structure is provided between one end of the return spring II and the valve body II. One end of the valve core II is in contact with and sealed to one end of the oil passage III.

[0012] Furthermore, one end of the valve core II and one end of the oil passage III are sealed by a conical contact seal or a spherical contact seal.

[0013] Furthermore, the limiting structure is a retaining ring, which is engaged in a retaining groove provided inside the valve body II.

[0014] Beneficial effects Compared with the prior art, the advantages of this utility model are as follows: This utility model discloses a lubrication supply structure for a quick-connect hydraulic-electric connector. By installing a slide valve on the lubrication plug and a one-way valve on the lubrication socket, the synergistic effect of the slide valve and the one-way valve forms two independent physical sealing barriers at the disconnection point. In the connected state, the system can supply oil normally. In the disconnected state, not only does the one-way valve on the lubrication socket prevent oil from flowing out of the socket end, but the structural design of the slide valve on the plug also cuts off the oil source at the plug end and seals its outlet, achieving "dry disconnection" at both ends of the plug and socket. This ensures that there is no leakage in both the connected and disconnected states, fundamentally solving the leakage problem. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the connector after it is disconnected in this utility model; Figure 2 This is an enlarged schematic diagram of the one-way valve in this utility model; Figure 3 This is a schematic diagram of the connector structure after mating in this utility model.

[0016] Wherein: 1-Lubricating oil plug, 2-Lubricating oil socket, 3-Lubricating oil passage I, 4-Lubricating oil passage II, 5-One-way valve, 6-Oil passage I, 7-Return oil passage, 8-Oil inlet, 9-Oil outlet, 10-Reset spring I, 11-Valve core I, 12-Oil passage II, 13-Return oil outlet, 14-Valve body I, 51-Valve core II, 52-Valve body II, 53-Reset spring II, 54-Oil passage III, 55-Connecting oil passage, 56-Snap ring, 110-Piston, 111-Spindle, 112-Mounting groove. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0018] See Figure 1-3 As shown, this utility model discloses a lubrication oil supply structure for a hydraulic-electric quick connector, comprising a lubrication oil plug 1 and a lubrication oil socket 2. A lubrication oil channel I3 is formed within the lubrication oil plug 1, which is connected to a lubrication oil pump via a pipeline. A lubrication oil channel II4 is formed within the lubrication oil socket 2, which is connected to an actuator via a pipeline, thereby supplying oil to the actuator. It should be noted that the lubrication oil plug 1 and lubrication oil socket 2 can be mated together and fixed using a hydraulic cylinder, pneumatic cylinder, or screw, etc., to achieve communication between lubrication oil, electrical, and hydraulic oil. This is existing technology and will not be elaborated upon here. This utility model's lubrication oil supply structure only relates to an improvement on one type of oil circuit.

[0019] In this embodiment, a one-way valve 5 is provided in the lubricating oil passage II4. The one-way valve 5 is defined as allowing lubricating oil to flow only to one end of the lubricating oil passage II, thus avoiding the problem of leakage caused by the backflow of lubricating oil. A slide valve is provided in the lubricating oil passage I3. An oil passage I6 and a return oil passage 7 are respectively opened in the lubricating oil plug 1 outside the lubricating oil passage I3. The return oil passage 7 is connected to the oil tank. An oil inlet 8 and an oil outlet 9 connected to the lubricating oil passage I3 are respectively opened at both ends of the oil passage I6. The slide valve includes a return spring I10 and a valve core I11. The valve core I11 is slidably installed in the lubricating oil passage I3. The return spring I10 is installed in the lubricating oil passage I3 on ​​one side of the valve core I11. An oil passage II12 is opened in the valve core I11. One end of the oil passage II12 extends to the middle outer wall surface of the valve core I11, and the other end extends to the end face of the valve core I11 away from the return spring I10. The end of the return oil passage 7 near the valve core I11 is connected to the lubricating oil passage I3 through the return oil port 13.

[0020] When the lubricating oil plug 1 is connected to the lubricating oil socket 2, under the thrust of the lubricating oil socket 2, the valve core I11 moves toward the return spring I10 and squeezes the return spring I10. The return spring I10 is compressed, and the two ends of the oil passage II12 are connected to the oil outlet 9 and the lubricating oil passage II4 respectively, so as to deliver the lubricating oil to the end face of the valve core I11 away from the return spring I10, and then enter the lubricating oil passage II4 through the one-way valve 5 of the lubricating oil socket 2 to achieve oil supply. The valve core I11 blocks the return oil port 13 to prevent the lubricating oil from flowing back to the oil tank.

[0021] When the lubricating oil plug 1 is separated from the lubricating oil socket 2, under the elastic force of the return spring I10, the valve core I11 moves away from the return spring I10 to the side where its end protrudes outside the mating end of the lubricating oil plug 1. The valve core I11 is protruding so that it can be pushed and slid by the lubricating oil socket 2 in the future, and the valve core I11 blocks the oil outlet 9 to prevent lubricating oil leakage.

[0022] This utility model discloses a lubrication supply structure for a hydraulic quick-connect connector. By installing a slide valve on the lubrication plug 1 and a one-way valve 5 on the lubrication socket 2, the synergistic action of the slide valve and the one-way valve 5 creates two independent physical sealing barriers at the disconnection point. In the connected state, the system can supply oil normally. In the disconnected state, not only does the one-way valve in the lubrication socket prevent oil from flowing out of the socket end, but the structural design of the plug slide valve also cuts off the oil source at the plug end and seals its outlet, achieving a "dry disconnection" at both ends of the plug and socket. This ensures no leakage in either the connected or disconnected states, fundamentally solving the leakage problem. This lubrication supply structure automatically controls the opening and closing of the double seals simply through the insertion and removal action of the connector itself. The structure is ingenious and compact, and operation is simple and effortless.

[0023] Preferably, the slide valve also includes a valve body I14, which is threaded to one end of the lubricating oil plug 1. The valve core I11 is slidably inserted into the valve body I14, which facilitates the installation of the entire slide valve and also facilitates the adjustment of the stroke of the valve core I11.

[0024] Preferably, the valve core I11 is composed of an integral piston 110 and a spindle 111. The piston 110 is slidably installed in the lubricating oil passage I3, and the spindle 111 is slidably installed in the valve body I14. The diameter of the piston 110 is larger than the diameter of the spindle 111, so that a limiting step is formed between the two. This limiting step is blocked by the valve body I14, so that the valve core I11 will not fall off. The oil passage II12 is located on the spindle 111 near the piston 110. After the lubricating oil plug 1 and the lubricating oil socket 2 are separated, the spindle 111 slides into the valve body I14, so that the valve body I14 can block the oil passage II12, further ensuring the sealing performance.

[0025] Preferably, at least one mounting groove 112 is formed on the outer wall of the piston 110, and a sealing ring (not shown in the figure) is installed in the mounting groove 112 to provide a seal. Similarly, a mounting groove 112 is formed on the end face of the valve core I11 away from the return spring I10, and a sealing ring (not shown in the figure) is installed in the mounting groove 112. After the lubricating oil plug 1 and the lubricating oil socket 2 are connected, they seal the oil passage and prevent lubricating oil leakage.

[0026] Preferably, the one-way valve 5 is threadedly connected to the mating end of the lubricating oil socket 2, and the one-way valve 5 is connected to the lubricating oil passage II4. The one-way valve 5 is located at the mating end, which further reduces the risk of leakage, and its threaded connection installation method facilitates disassembly and maintenance. Specifically, the one-way valve 5 includes a valve core II51, a valve body II52, and a return spring II53. The valve body II52 is threadedly connected to the lubricating oil socket 2. An oil passage III54 is provided inside the valve body II52, which is connected to the lubricating oil passage II4. A connecting oil passage 55 is provided inside the valve core II51, which connects the middle outer wall to the tail end face, so that the connecting oil passage 55 is connected to the oil passage III54. The valve core II51 and the return spring II53 are arranged sequentially in the oil passage III54 along the lubricating oil flow direction. A detachable limiting structure is provided between one end of the return spring II53 and the valve body II52, which serves to install and limit the return spring II53, so that the return spring II53 has elastic potential energy, thereby allowing one end of the valve core II51 to contact and seal with one end of the oil passage III54. When the lubricating oil plug 1 connects with the lubricating oil socket 2, the lubricating oil in the oil passage II12 pushes the valve core II51 towards the return spring II53, allowing the lubricating oil to enter through the connecting oil passage 55 into the oil passage III54, and then into the lubricating oil passage II4, thus achieving oil supply. When the lubricating oil plug 1 separates from the lubricating oil socket 2, under the elastic force of the return spring II53, the valve core II51 moves away from the return spring II53, causing one end of the valve core II51 to contact and seal with one end of the oil passage III54, preventing oil leakage.

[0027] Preferably, one end of valve core II51 and one end of oil passage III54 are sealed by a conical surface contact seal or a spherical surface contact seal. Using a conical surface contact seal or a spherical surface contact seal provides a larger contact area and a better sealing effect.

[0028] Preferably, the limiting structure is a retaining ring 56, which engages in a groove provided inside the valve body II52. The end of the return spring II53 is attached to the side of the retaining ring 56 to achieve limiting. Using the retaining ring 56 for limiting facilitates the disassembly and maintenance of the valve core II51 and the return spring II53.

[0029] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. A lubrication oil supply structure for an oil-hydraulic quick connector, comprising a lubrication oil plug (1) and a lubrication oil socket (2), wherein the lubrication oil plug (1) has a lubrication oil channel I (3) and the lubrication oil socket (2) has a lubrication oil channel II (4), characterized in that, The lubricating oil passage II (4) is provided with a one-way valve (5), and the lubricating oil passage I (3) is provided with a slide valve. The lubricating oil plug (1) on the outside of the lubricating oil passage I (3) is provided with an oil passage I (6) and an oil return passage (7). The two ends of the oil passage I (6) are respectively provided with an oil inlet (8) and an oil outlet (9) communicating with the lubricating oil passage I (3). The slide valve includes a return spring I (10) and a valve core I (11). The valve core I (11) is slidably installed in the lubricating oil passage I (3). The return spring I (10) is installed in the lubricating oil passage I (3) on one side of the valve core I (11). The valve core I (11) is provided with an oil passage II (12). The oil return passage (7) is close to the valve core I (11). One end of the lubricating plug (1) is connected to the lubricating oil channel I (3) through the return oil port (13). When the lubricating plug (1) is connected to the lubricating oil socket (2), the valve core I (11) moves toward the return spring I (10) and squeezes the return spring I (10). The two ends of the oil passage II (12) are connected to the oil outlet (9) and the lubricating oil channel II (4) respectively. The valve core I (11) blocks the return oil port (13). When the lubricating plug (1) is separated from the lubricating oil socket (2), the valve core I (11) moves away from the return spring I (10) to the side where its end protrudes outside the end of the lubricating plug (1) and blocks the oil outlet (9).

2. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 1, characterized in that, The slide valve also includes a valve body I (14), which is threadedly connected to one end of the lubricating oil plug (1), and the valve core I (11) is slidably inserted into the valve body I (14).

3. The lubrication oil supply structure for a hydraulic quick connector according to claim 2, characterized in that, The valve core I (11) is composed of an integral piston (110) and a spindle (111). The piston (110) is slidably installed in the lubricating oil passage I (3), and the spindle (111) is slidably installed in the valve body I (14). The diameter of the piston (110) is larger than the diameter of the spindle (111). The oil passage II (12) is located on the spindle (111) near one end of the piston (110).

4. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 3, characterized in that, The piston (110) has at least one mounting groove (112) on its outer wall, and a sealing ring is installed in the mounting groove (112).

5. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 1, characterized in that, The valve core I (11) has an installation groove (112) on one end face away from the reset spring I (10), and a sealing ring is installed in the installation groove (112).

6. A lubrication oil supply structure for an electro-hydraulic quick connector according to any one of claims 1-5, characterized in that, The one-way valve (5) is threadedly connected to the mating end of the lubricating oil socket (2), and the one-way valve (5) is connected to the lubricating oil passage II (4).

7. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 6, characterized in that, The one-way valve (5) includes a valve core II (51), a valve body II (52), and a return spring II (53). The valve body II (52) is threaded onto the lubricating oil socket (2). An oil passage III (54) is provided inside the valve body II (52). A connecting oil passage (55) is provided inside the valve core II (51) to connect the middle outer wall with the tail end face. The valve core II (51) and the return spring II (53) are arranged sequentially in the oil passage III (54) along the direction of lubricating oil flow. A detachable limiting structure is provided between one end of the return spring II (53) and the valve body II (52). One end of the valve core II (51) is in contact with and sealed to one end of the oil passage III (54).

8. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 7, characterized in that, One end of the valve core II (51) and one end of the oil passage III (54) are sealed by a conical contact seal or a spherical contact seal.

9. The lubrication oil supply structure for an oil-hydraulic quick connector according to claim 7, characterized in that, The limiting structure is a retaining ring (56), which is engaged in a groove provided in the valve body II (52).

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