Quick-plug female joint of hydraulic quick-plug joint system

Abstract

The utility model discloses a quick-plug female connector of a hydraulic quick-plug connector system, relates to the technical field of hydraulic plugs, and can solve the problem that an existing quick-plug female connector is only provided with a single oil way and cannot be subjected to hot plug. The embodiment of the utility model discloses a quick-plug female connector of a hydraulic quick-plug connector system. The quick-plug female connector has an independent state and a plug-in state. The quick-plug female joint comprises a female joint valve core, a retaining cylinder main body and a cone valve main body, the cone valve main body is sleeved on the female joint valve core, the retaining cylinder main body is sleeved on the cone valve main body, and the inner side and the outer side of the cone valve main body are respectively connected with the female joint valve core and the retaining cylinder main body in a sliding and sealing manner; an inner oil return channel is arranged in the quick-plug female joint; in an independent state, the cone valve body is located at the end of the female connector valve element, and the inner oil return channel is in a communicated state; in the inserted connection state, the cone valve body is located in the middle of the female connector valve element, and the inner oil return channel is cut off into two channels.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction equipment technology, and specifically to a quick-connect female connector of a hydraulic quick-connect coupling system. Background Technology

[0002] Currently available double-acting hydraulic equipment uses a dual-pipe, dual-connector design to form a circuit, which is inconvenient for practical field connections. Because the quick-connect fittings cannot form a circuit internally, two hydraulic lines and two quick-connect fittings are required. When stopping operation, if the quick-connect fittings need to be inserted or removed, the hydraulic pump station must be stopped or the hydraulic lines depressurized before the two quick-connect fittings corresponding to the two hydraulic lines can be removed. Forcibly removing the quick-connect fittings while the hydraulic pump station is running will cause internal pressure, making subsequent quick-connect fitting installation impossible. Furthermore, oil leaks and seepage may occur after removing the quick-connect fittings. Therefore, the dual-connectors used in existing double-acting hydraulic equipment not only require two insertions and removals but also do not support hot-swapping, making them cumbersome to use. Additionally, the quick-connect fittings are difficult to clean, necessitating improvement or redesign.

[0003] Based on the above background, the inventors designed a quick-connect female connector for a hydraulic quick-connect coupling system, which solves at least one of the above problems, and thus, this application is filed. Summary of the Invention

[0004] The purpose of this application is to provide a quick-connect female connector for a hydraulic quick-connect coupling system, which solves the problem that the quick-connect female connector in the prior art only has a single oil circuit, does not have an oil return channel, and cannot support hot-plugging.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] This application provides a quick-connect female connector for a hydraulic quick-connect coupling system, which has two states: an independent state and a plugged-in state.

[0007] The quick-connect female connector includes a female connector valve core, a retaining cylinder body, and a cone valve body. The cone valve body is fitted onto the female connector valve core, and the retaining cylinder body is fitted onto the cone valve body. The inner and outer sides of the cone valve body are slidably sealed to the female connector valve core and the retaining cylinder body, respectively.

[0008] The quick-connect female connector is equipped with a female connector valve core, as well as an internal oil return channel composed of a retaining cylinder body and a cone valve body;

[0009] In the independent state: the cone valve body is located at the end of the valve core of the female connector, the internal oil return channel is in a connected state, and the oil inlet and oil outlet of the internal oil return channel are located on the same side of the quick-connect female connector;

[0010] In the plug-in state: the cone valve body is located in the middle of the valve core of the female connector, and the internal oil return channel is cut into two channels. The oil inlet and oil outlet of the two channels are located on both sides of the quick-connect female connector.

[0011] Optionally, the inner peripheral wall of the retaining cylinder body is provided with a retaining cylinder inner conical surface for limiting the cone valve body from sliding out of the female connector valve core, and the cone valve body is also provided with a cone valve groove;

[0012] The female connector valve core is provided with a valve core inner hole and a valve core oil outlet. The valve core oil outlet is located at the end of the valve core inner hole away from the hole. The cone valve groove is connected to the valve core inner hole through the valve core oil outlet. The female connector valve core is also provided with a retaining ring structure on the side away from the valve core oil outlet. The retaining ring structure is provided with several female connector return ports.

[0013] The end of the retaining cylinder body away from the cone valve body is fitted and fixed on the retaining ring structure, and the retaining cylinder body has a retaining cylinder inner cavity that communicates with the cone valve groove;

[0014] The internal oil return channel includes, in sequence, the valve core inner hole, the valve core oil outlet, the cone valve groove, the retaining cylinder inner cavity, and the female connector oil return port.

[0015] Optionally, the device further includes a first spring fitted onto the female connector valve core, with one end of the first spring pressing against the retaining ring structure and the other end pressing against the end face within the cone valve groove.

[0016] Optionally, the quick-connect female connector further includes a female connector housing, a steel ball mounting base, a floating steel ball, a limiting retaining ring, and a first torsion spring;

[0017] The ball mounting base is provided with several ball mounting holes distributed along its circumference, and the floating ball is placed in the ball mounting holes;

[0018] The ball bearing mounting base is fitted onto the retaining cylinder body, the female connector housing is fitted onto the ball bearing mounting base, the limiting retaining ring is installed between the ball bearing mounting base and the female connector housing, the first torsion spring is fitted onto the ball bearing mounting base, and the limiting retaining ring presses against the floating ball through the first torsion spring.

[0019] Optionally, the quick-connect female connector further includes a second spring and a retaining ring body that slides between the retaining cylinder body and the steel ball mounting seat;

[0020] The outer periphery of the retaining cylinder body is provided with an outer retaining cylinder step. One end of the second spring presses against the outer retaining cylinder step, and the other end presses against the inside of the retaining ring body.

[0021] Optionally, the female connector housing is further provided with a limiting step, and an annular cavity corresponding to the limiting step is provided between the female connector housing and the steel ball mounting seat;

[0022] Several floating steel balls are located inside the annular cavity.

[0023] Optionally, the quick-connect female connector further includes a torsion spring seat threaded onto the ball bearing mounting seat;

[0024] One end of the first torsion spring is connected to the outer shell of the female connector, and the other end is connected to the torsion spring seat.

[0025] Optionally, the steel ball mounting base is provided with a limiting ring protrusion;

[0026] The ball bearing mounting base has an external thread, and the torsion spring base has an internal thread that matches the external thread, with the length of the external thread being greater than the length of the internal thread.

[0027] Optionally, the torsion spring seat has an installation step on the side opposite to the limiting ring protrusion.

[0028] Optionally, the cone valve body is provided with an inner ring groove and an outer ring groove for installing a sealing ring;

[0029] The cone valve body is slidably and sealed to the valve core of the female connector and the main body of the retaining cylinder through the sealing rings in the inner and outer annular grooves, respectively.

[0030] The beneficial effects of this utility model are:

[0031] This application provides a quick-connect female connector that allows oil to return through an internal oil return channel in an independent state, and in the plugged-in state, forms two oil circuits with the quick-connect male connector through the truncated internal oil return channel, thereby solving the problem that the prior art only has a single oil circuit, does not have an oil return channel, and cannot support hot-plugging. Attached Figure Description

[0032] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of this application.

[0033] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of this application.

[0034] Figure 3 This is a three-dimensional exploded structure diagram of Embodiment 1 of this application.

[0035] Figure 4 This is a cross-sectional structural diagram of Embodiment 2 of this application.

[0036] Figure 5 This is a cross-sectional view of the quick-connect male connector in Embodiment 2 of this application.

[0037] Figure 6 This is a three-dimensional structural diagram of the quick-connect male connector in Embodiment 2 of this application.

[0038] Figure 7 This is a schematic diagram of the left side of the quick-connect male connector in Embodiment 2 of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Quick-connect female connector, 11-Female connector housing, 111-Limiting step, 112-Floating step, 12-Female connector valve core, 121-Valve core inner hole, 122-Valve core oil outlet, 123-Retaining ring structure, 124-Female connector oil return port, 13-Retaining cylinder body, 131-Retaining cylinder inner conical surface, 132-Retaining cylinder inner cavity, 133-Retaining cylinder outer step, 14-Cone valve body, 141-Inner ring groove, 142-Outer ring groove, 143-Cone valve groove, 15-Retaining ring body, 151-Retaining ring inner step, 16-Steel ball mounting seat, 161-Steel ball mounting hole, 162-Limiting ring protrusion, 17-Torsion spring seat, 171-Mounting step, 18-Limiting retaining ring, 19-Floating steel ball;

[0041] 2-Quick-connect male connector, 21-Male connector housing, 211-Snap-fit ​​ring groove, 212-Male connector oil return port, 213-Mounting ring protrusion, 214-Positioning ring protrusion, 22-Oil valve core, 221-Oil through hole, 222-Spring pressing step, 223-Locking ring protrusion, 23-High-pressure valve core, 231-Pressure groove, 232-Flare structure, 233-Valve core oil inlet, 24-Oil distribution guide sleeve, 241-Guide sleeve inner conical surface, 242-Sealing ring mounting ring groove, 25-Oil sealing ring, 26-Oil blocking sealing ring, 261-Oil through conical slope;

[0042] 31-Oil outlet channel, 32-External oil return channel, 33-Internal oil return channel, 34-Oil sealing channel. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0044] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Example 1:

[0048] like Figures 1 to 3 As shown, this embodiment provides a quick-connect female connector 1 for a hydraulic quick-connect coupling system, which has two states: an independent state and a plugged-in state.

[0049] The quick-connect female connector 1 includes a female connector valve core 12, a retaining cylinder body 13, and a cone valve body 14. The cone valve body 14 is fitted onto the female connector valve core 12, and the retaining cylinder body 13 is fitted onto the cone valve body 14. The inner and outer sides of the cone valve body 14 are slidably sealed to the female connector valve core 12 and the retaining cylinder body 13, respectively.

[0050] The quick-connect female connector 1 is provided with a female connector valve core 12, and an internal oil return channel 33 composed of a retaining cylinder body 13 and a cone valve body 14;

[0051] In the independent state: the cone valve body 14 is located at the end of the female connector valve core 12, the inner oil return channel 33 is in a connected state, and the oil inlet and oil outlet of the inner oil return channel 33 are located on the same side of the quick-connect female connector 1.

[0052] In the plug-in state: the cone valve body 14 is located in the middle of the female connector valve core 12, and the inner oil return channel 33 is cut into two channels. The oil inlet and oil outlet of the two channels are located on both sides of the quick-connect female connector 1.

[0053] Specifically, in this embodiment, the inner peripheral wall of the retaining cylinder body 13 is provided with a retaining cylinder inner cone surface 131 for restricting the cone valve body 14 from sliding out of the female connector valve core 12, and the cone valve body 14 is also provided with a cone valve groove 143.

[0054] The female connector valve core 12 is provided with a valve core inner hole 121 and a valve core oil outlet 122. The valve core oil outlet 122 is located at the end of the valve core inner hole 121 away from the hole. The cone valve groove 143 communicates with the valve core inner hole 121 through the valve core oil outlet 122. The female connector valve core 12 is also provided with a retaining ring structure 123 on the side away from the valve core oil outlet 122. The retaining ring structure 123 is provided with a plurality of female connector return ports 124.

[0055] The end of the retaining cylinder body 13 away from the cone valve body 14 is fitted and fixed on the retaining ring structure 123, and the retaining cylinder body 13 is provided with a retaining cylinder inner cavity 132 that communicates with the cone valve groove 143;

[0056] The internal oil return channel 33 includes a valve core inner hole 121, a valve core oil outlet 122, a cone valve groove 143, a retaining cylinder inner cavity 132, and a female connector oil return port 124 connected in sequence.

[0057] like Figure 1 As shown, when the quick-connect female connector 1 is in an independent state, the cone valve groove 143 of the cone valve body 14 and the valve core outlet 122 of the cone valve body 14 are in communication. This allows hydraulic oil to enter the quick-connect female connector 1 from the valve core inner hole 121, and then flow sequentially to the valve core outlet 122, the cone valve groove 143, and the retaining cylinder inner cavity 132, finally flowing out from the female connector return port 124. During the insertion process of the quick-connect female connector 1, the cone valve body 14 is pushed by the quick-connect male connector 2, causing it to move towards the middle area of ​​the valve core of the female connector until the quick-connect male connector 2 is inserted into the set position. At this time, the cone valve groove... When the valve core outlet 122 of the female connector valve core 12 is no longer connected to the valve core 143, the hydraulic oil will flow out from the valve core outlet 122 into the quick-connect male connector 2 after entering the valve core inner hole 121. In the plugged state, since the cone valve body 14 has moved away from the initial position, after the quick-connect male connector 2 is inserted, there is a channel between the retaining cylinder body 13 and the female connector valve core 12 that can accommodate the hydraulic oil. This allows the hydraulic oil in the quick-connect male connector 2 to flow back to the hydraulic pump station through the channel between the retaining cylinder body 13 and the female connector valve core 12, as well as the female connector return port 124 on the retaining ring structure 123.

[0058] Specifically, in this embodiment, the first spring (not shown in the figure) is also fitted on the female connector valve core 12. One end of the first spring presses against the retaining ring structure 123, and the other end presses against the end face inside the cone valve groove 143.

[0059] By setting the first spring, the cone valve body 14 will continuously press against the cone surface 131 inside the retaining cylinder, and when the quick-connect male connector 2 is pulled out from the quick-connect female connector 1, the cone valve body 14 can quickly reset, so that the internal return oil channel 33 can be quickly reconnected, so that the hydraulic oil pumped out by the hydraulic pump station will not leak out from the quick-connect female connector 1.

[0060] Specifically, in this embodiment, the quick-connect female connector 1 also includes a female connector housing 11, a steel ball mounting base 16, a floating steel ball 19, a limiting retaining ring 18, and a first torsion spring (not shown in the figure);

[0061] The ball bearing mounting base 16 is provided with a plurality of ball bearing mounting holes 161 distributed along its circumference, and the floating ball bearing 19 is disposed in the ball bearing mounting holes 161.

[0062] The ball bearing mounting base 16 is fitted onto the retaining cylinder body 13, the female connector housing 11 is fitted onto the ball bearing mounting base 16, the limiting retaining ring 18 is installed between the ball bearing mounting base 16 and the female connector housing 11, the first torsion spring is fitted onto the ball bearing mounting base 16, and the limiting retaining ring 18 presses against the floating ball 19 through the first torsion spring.

[0063] By configuring the female connector housing 11, the steel ball mounting base 16, the floating steel ball 19, the limiting retaining ring 18, and the first torsion spring, the quick-connect male connector 2 can be inserted into the quick-connect female connector 1 and then secured by the floating steel ball 19 to achieve the quick-connect function. When it is necessary to remove the quick-connect male connector 2 from the quick-connect female connector 1, simply twist the female connector housing 11 to compress the torsion spring, thereby freeing the limiting retaining ring 18 from the compression of the first torsion spring. This allows the floating steel ball 19 to float up and down within the steel ball mounting hole 161 of the steel wire mounting base. At this point, the quick-connect male connector 2 can be pulled out of the quick-connect female connector 1. Then, release the female connector housing 11 of the quick-connect female connector 1, and the first torsion spring will reset, allowing the limiting retaining ring 18 to press against the floating steel ball 19 again.

[0064] Specifically, in this embodiment, the quick-connect female connector 1 further includes a second spring (not shown in the figure) and a retaining ring body 15 that is slidably disposed between the retaining cylinder body 13 and the steel ball mounting seat 16;

[0065] The outer periphery of the retaining cylinder body 13 is provided with a retaining cylinder outer step 133. One end of the second spring presses against the retaining cylinder outer step 133, and the other end presses against the retaining ring body 15.

[0066] In this embodiment, by setting a second spring and a retaining ring body 15, one end of the second spring presses against the outer step 133 of the retaining cylinder and the other end presses against the inside of the retaining ring body 15, so that the second spring can continuously apply a certain pressure to the retaining ring body 15, so that when the quick-connect female connector 1 is in an independent state, external dust and dirt will not enter the quick-connect female connector 1 and contaminate the hydraulic oil circuit.

[0067] Specifically, in this embodiment, the female connector housing 11 is further provided with a limiting step 111, and an annular cavity corresponding to the limiting step 111 is provided between the female connector housing 11 and the steel ball mounting seat 16.

[0068] Several floating steel balls 19 are located inside the annular cavity.

[0069] In this embodiment, by setting a limiting step 111, an annular cavity can be formed between the female connector shell 11 and the steel ball mounting seat 16, which facilitates the floating steel ball 19 to float. In this embodiment, the thickness of the annular cavity between the female connector shell 11 and the steel ball mounting seat 16 is smaller than the diameter of the floating steel ball 19.

[0070] Specifically, in this embodiment, the quick-connect female connector 1 further includes a torsion spring seat 17 threadedly connected to the ball bearing mounting seat 16;

[0071] The ball bearing mounting base 16 is provided with a limiting ring protrusion 162;

[0072] One end of the first torsion spring is connected to the female connector housing 11, and the other end is connected to the torsion spring seat 17;

[0073] The ball bearing mounting seat 16 is provided with an external thread, and the torsion spring seat 17 is provided with an internal thread that is compatible with the external thread. The length of the external thread is greater than the length of the internal thread, so that when the quick-connect female connector 1 in this embodiment is installed, it can be connected to the oil pipe of the hydraulic pump station by the thread.

[0074] In this embodiment, the torsion spring seat 17, which is threadedly connected to the steel ball mounting seat 16, facilitates the installation and disassembly of components such as the female connector housing 11, the first torsion spring, the floating steel ball 19, and the limiting retaining ring 18 in the entire quick-connect female connector 1.

[0075] Specifically, in this embodiment, the torsion spring seat 17 is provided with an installation step 171 on the side opposite to the limiting ring protrusion 162, so that when the quick-connect female connector 1 is installed in this embodiment, the oil pipe part of the hydraulic pump station can be inserted into the quick-connect female connector 1, thereby improving the stability of the connection.

[0076] Specifically, in this embodiment, the cone valve body 14 is provided with an inner ring groove 141 and an outer ring groove 142 for installing a sealing ring;

[0077] The cone valve body 14 is slidably and sealingly connected to the female connector valve core 12 and the retaining cylinder body 13 through the sealing rings in the inner ring groove 141 and the outer ring groove 142, respectively.

[0078] In this embodiment, the cone valve body 14 is slidably and sealed to the female connector valve core 12 and the retaining cylinder body 13 through the sealing rings in the inner ring groove 141 and the outer ring groove 142, so as to ensure the oil sealing effect when the quick-connect female connector 1 is in an independent state.

[0079] Example 2:

[0080] Based on the above embodiment 1, as follows Figures 4 to 7 As shown, this embodiment provides a hot-swappable hydraulic quick-connect coupling system, including a matching quick-connect female connector 1 and a quick-connect male connector 2. The quick-connect female connector 1 and the quick-connect male connector 2 have independent states and plugged-in states:

[0081] In the independent state: the quick-connect female connector 1 is provided with an internal oil return channel 33, and the quick-connect male connector 2 is provided with two oil sealing channels 34 in a blocked state;

[0082] In the plugged state: the quick-connect male connector 2 cuts off the inner oil return channel 33 in the quick-connect female connector 1, and the quick-connect female connector 1 connects the two sealing oil channels 34 of the quick-connect male connector 2. The cut-off inner oil return channel 33 and the two sealing oil channels 34 respectively form two oil outlet channels 31 and outer oil return channels 32 that penetrate the quick-connect female connector 1 and the quick-connect male connector 2.

[0083] The hydraulic quick-connect coupling system disclosed in this embodiment allows the quick-connect male connector 2 and quick-connect female connector 1 to be independently separated. Because the quick-connect female connector 1 has an internal return oil channel 33, the hydraulic oil flowing from the hydraulic pump station can enter the quick-connect female connector 1 and then directly return to the hydraulic pump station through the internal return oil channel 33, forming an internal circulation oil circuit. This means that the hydraulic pump station does not need to be shut down when the quick-connect male connector 2 and quick-connect female connector 1 are separated. Therefore, when the quick-connect male connector 2 is pulled out of the quick-connect female connector 1, it is not necessary to shut down the hydraulic pump station beforehand, realizing the hot-swappable function of the quick-connect male connector 2 and quick-connect female connector 1. At the same time, it makes the quick-connect male connector 2 and quick-connect female connector 1 easy to clean.

[0084] Furthermore, in the hydraulic quick-connect coupling system of this embodiment, when the quick-connect female connector 1 is in a separate and independent state, the quick-connect male connector 2 has an internal oil return channel 33 and two sealed oil channels 34 in a blocked state. After the quick-connect male connector 2 is inserted into the quick-connect female connector 1, the internal oil return channel 33 is cut off, so that the cut-off internal oil return channel 33 and the two sealed oil channels 34 respectively form two oil outlet channels 31 and external oil return channels 32 that penetrate the quick-connect female connector 1 and the quick-connect male connector 2. This allows the hydraulic oil flowing out of the hydraulic pump station to first flow out to the external hydraulic device through the quick-connect female connector 1 and the quick-connect male connector 2, and then flow from the external hydraulic device into the hydraulic pump station through the quick-connect male connector 2 and the quick-connect female connector 1, forming an external circulation oil circuit. Compared with the existing double-pipe double-connector system, only one insertion is required to form an external circulation oil circuit, simplifying the number of insertion and removal operations and improving the insertion and removal efficiency.

[0085] In this embodiment, the quick-connect male connector 2 includes a male connector housing 21, an oil passage valve core 22, a high-pressure valve core 23, an oil distribution guide sleeve 24, and an oil sealing ring 25;

[0086] The male connector housing 21 is fitted onto the oil distribution guide sleeve 24, and the oil sealing ring 25 is slidably and sealingly connected between the male connector housing 21 and the oil distribution guide sleeve 24. The cavity between the male connector housing 21 and the oil distribution guide sleeve 24, and the oil sealing ring 25 form one of the oil sealing channels 34.

[0087] One end of the oil passage valve core 22 is fixed inside the oil distribution guide sleeve 24. The high pressure valve core 23 is located inside the oil distribution guide sleeve 24 and can move towards the oil passage valve core 22. The oil passage hole 221 inside the oil passage valve core 22, the inner cavity of the oil distribution guide sleeve 24 and the high pressure valve core 23 form another oil sealing channel 34.

[0088] like Figure 5As shown, in this embodiment, when the quick-connect male connector 2 is in an independent state, both of its internal oil sealing channels 34 are blocked. Since the oil sealing ring 25 is slidably sealed between the male connector housing 21 and the oil distribution guide sleeve 24, after the quick-connect male connector 2 is inserted into the quick-connect female connector 1, the oil sealing ring 25 is pressed into the quick-connect male connector 2 by the quick-connect female connector 1. At this time, the blocking state of the cavity between the male connector housing 21 and the oil distribution guide sleeve 24, and the oil sealing channel 34 formed by the oil sealing ring 25, is released. This allows the oil sealing channel 34 to connect with the interrupted internal return oil channel 33 inside the quick-connect female connector 1, forming an external return oil channel 32. This allows the hydraulic oil flowing out of external hydraulic devices to flow back to the hydraulic pump station through the external return oil channel 32 formed by the blocked channel. Meanwhile, since one end of the oil passage valve core 22 of the quick-connect male connector 2 is fixed inside the oil distribution guide sleeve 24 in this embodiment, and the high-pressure valve core 23 is located inside the oil distribution guide sleeve 24 and can move towards the oil passage valve core 22, after the quick-connect male connector 2 is inserted into the quick-connect female connector 1, the high-pressure valve core 23 will move towards the oil passage valve core 22, so that the blocking state of the oil passage hole 221 in the oil passage valve core 22, the inner cavity of the oil distribution guide sleeve 24 and the high-pressure valve core 23 is simultaneously released, and it connects with the cut-off inner return oil channel 33 in the quick-connect female connector 1 to form an oil outlet channel 31, so that the hydraulic oil entering the quick-connect female connector 1 from the hydraulic pump station directly enters the quick-connect male connector 2 through the oil outlet channel 31, and then flows to the external hydraulic device.

[0089] Therefore, in this embodiment, through the cooperation between the above-mentioned components in the quick-connect male connector 2, the quick-connect male connector 2 can be in an independent state with its two internal oil sealing channels 34 blocked, and the hydraulic oil inside will not flow out from the quick-connect male connector 2. When the quick-connect male connector 2 is in the connected state, the blocking state of its two internal oil sealing channels 34 is released, forming two oil circuits, which can then cooperate with the quick-connect female connector 1 to simultaneously realize dual oil circuits and hot-plugging.

[0090] Specifically, in this embodiment, the quick-connect male connector 2 further includes a third spring (not shown in the figure) and a fourth spring (not shown in the figure);

[0091] The oil passage hole 221 of the oil passage valve core 22 is provided with a spring pressing step 222, and the high pressure valve core 23 is provided with a pressing groove 231 on the side facing the oil passage valve core 22. One end of the third spring presses against the spring pressing step 222, and the other end presses against the pressing groove 231.

[0092] The fourth spring is fitted onto the oil distribution guide sleeve 24, with one end of the fourth spring pressing against the oil sealing ring 25 and the other end pressing against the male connector housing 21.

[0093] By setting the third and fourth springs, when the quick-connect male connector 2 is in the independent state, the two oil sealing channels 34 are completely blocked. At the same time, when the quick-connect male connector 2 changes from the plugged state to the independent state, the oil sealing ring 25 and the high-pressure valve core 23 can be quickly reset to prevent hydraulic oil from leaking out.

[0094] Specifically, in this embodiment, the inner periphery of the oil distribution guide sleeve 24 at the end away from the oil valve core 22 is provided with an inner conical surface 241.

[0095] The high-pressure valve core 23 has a horn-shaped structure 232 at one end facing the oil-passing valve core 22, which is adapted to the inner conical surface 241 of the guide sleeve. The high-pressure valve core 23 also has several valve core oil inlets 233 located on the horn-shaped structure 232.

[0096] In this embodiment, a conical surface 241 is provided inside the guide sleeve 24, and a horn-shaped structure 232 is provided at the end of the high-pressure valve core 23 near the oil passage valve core 22. This allows the high-pressure valve core 23 to have a good sealing effect when the quick-connect male connector 2 is in an independent state, and when the quick-connect male connector 2 is in a plugged state, the hydraulic oil in the quick-connect female connector 1 can enter the oil passage valve core 22 through the valve core oil passage of the horn-shaped structure 232, and then flow to the external hydraulic device.

[0097] Specifically, in this embodiment, the outer periphery of the oil distribution guide sleeve 24 away from the oil valve core 22 is provided with a sealing ring mounting groove 242;

[0098] The quick-connect male connector 2 also includes an oil-blocking sealing ring 26 installed in the sealing ring mounting groove 242. The oil-blocking sealing ring 26 is provided with an annular oil-passing cone slope 261. By providing the oil-passing cone slope 261, the flow resistance of hydraulic oil from external hydraulic devices into the quick-connect male connector 2 and then from the quick-connect male connector 2 into the quick-connect female connector 1 can be reduced when the quick-connect male connector 2 is in the plugged state.

[0099] Specifically, in this embodiment, the inner peripheral wall of the male connector housing 21 is provided with a mounting ring protrusion 213, and the mounting ring protrusion 213 is provided with a plurality of male connector oil return ports 212;

[0100] The cavity between the male connector housing 21 and the oil distribution guide sleeve 24, and the oil sealing channel 34 formed by the oil sealing ring 25, also include the male connector oil return port 212.

[0101] This embodiment enables the installation and disassembly of components such as the male connector housing 21, the oil valve core 22, and the oil distribution guide sleeve 24 by setting the mounting ring protrusion 213.

[0102] Specifically, in this embodiment, a locking ring protrusion 223 is provided on the outer peripheral wall of the oil valve core 22;

[0103] The mounting ring protrusion 213 of the male connector housing 21 is locked between the oil distribution guide sleeve 24 and the locking ring protrusion 223. The locking ring protrusion 223 secures the mounting ring protrusion 213 of the male connector housing 21 between the oil distribution guide sleeve 24 and the locking ring protrusion 223.

[0104] Specifically, in this embodiment, one end of the oil valve core 22 is provided with an external thread, and the oil distribution guide sleeve 24 is provided with an internal thread that matches the external thread. The oil valve core 22 and the oil distribution guide sleeve 24 are threadedly connected.

[0105] The mounting ring protrusion 213 is locked between the oil valve core 22 and the oil distribution guide sleeve 24 via a threaded connection.

[0106] Specifically, in this embodiment, the outer peripheral wall of the male connector housing 21 is provided with a positioning annular protrusion 214 to facilitate the insertion of the quick-connect male connector 2. Meanwhile, as... Figure 6 and Figure 7 As shown, six evenly distributed planes are provided on the positioning ring protrusion 214 to facilitate threaded connection between the male connector housing 21 and the oil pipe of the external hydraulic device.

[0107] Specifically, in this embodiment, sealing rings are provided between the oil distribution guide sleeve 24 and the high-pressure valve core 23 and the oil passage valve core 22 to ensure the oil sealing effect when the quick-connect male connector 2 is in an independent state.

[0108] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A quick-connect female connector for a hydraulic quick-connect coupling system, characterized in that, The quick-connect female connector (1) has two states: an independent state and a plugged-in state; The quick-connect female connector (1) includes a female connector valve core (12), a retaining cylinder body (13), and a cone valve body (14). The cone valve body (14) is fitted onto the female connector valve core (12), and the retaining cylinder body (13) is fitted onto the cone valve body (14). The inner and outer sides of the cone valve body (14) are slidably sealed to the female connector valve core (12) and the retaining cylinder body (13), respectively. The quick-connect female connector (1) is provided with a female connector valve core (12), and an internal oil return channel (33) composed of a retaining cylinder body (13) and a cone valve body (14); In the independent state: the cone valve body (14) is located at the end of the female connector valve core (12), the inner oil return channel (33) is in a connected state, and the oil inlet and oil outlet of the inner oil return channel (33) are located on the same side of the quick-connect female connector (1); In the plug-in state: the cone valve body (14) is located in the middle of the female connector valve core (12), the inner oil return channel (33) is cut into two channels, and the oil inlet and oil outlet of the two channels are located on both sides of the quick-connect female connector (1).

2. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 1, characterized in that, The inner peripheral wall of the retaining cylinder body (13) is provided with a retaining cylinder inner cone surface (131) for restricting the cone valve body (14) from sliding out of the female connector valve core (12), and the cone valve body (14) is also provided with a cone valve groove (143); The female connector valve core (12) is provided with a valve core inner hole (121) and a valve core oil outlet (122). The valve core oil outlet (122) is located at the end of the valve core inner hole (121) away from the orifice. The cone valve groove (143) is connected to the valve core inner hole (121) through the valve core oil outlet (122). The side of the female connector valve core (12) away from the valve core oil outlet (122) is also provided with a retaining ring structure (123). The retaining ring structure (123) is provided with a plurality of female connector return ports (124). The end of the retaining cylinder body (13) away from the cone valve body (14) is fitted and fixed on the retaining ring structure (123), and the retaining cylinder body (13) is provided with a retaining cylinder inner cavity (132) that communicates with the cone valve groove (143); The inner return oil channel (33) includes a valve core inner hole (121), a valve core oil outlet (122), a cone valve groove (143), a retaining cylinder inner cavity (132), and a female connector return oil port (124) connected in sequence.

3. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 2, characterized in that, It also includes a first spring fitted on the female connector valve core (12), one end of the first spring pressing against the retaining ring structure (123), and the other end pressing against the end face inside the cone valve groove (143).

4. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 2, characterized in that, The quick-connect female connector (1) also includes a female connector housing (11), a steel ball mounting base (16), a floating steel ball (19), a limiting retaining ring (18), and a first torsion spring; The ball bearing mounting base (16) is provided with a number of ball bearing mounting holes (161) distributed along its circumference, and the floating ball bearing (19) is disposed in the ball bearing mounting holes (161); The ball bearing mounting base (16) is fitted onto the retaining cylinder body (13), the female connector housing (11) is fitted onto the ball bearing mounting base (16), the limiting retaining ring (18) is installed between the ball bearing mounting base (16) and the female connector housing (11), the first torsion spring is fitted onto the ball bearing mounting base (16), and the limiting retaining ring (18) presses against the floating ball (19) through the first torsion spring.

5. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 4, characterized in that, The quick-connect female connector (1) also includes a second spring and a retaining ring body (15) that slides between the retaining cylinder body (13) and the steel ball mounting seat (16); The outer periphery of the retaining cylinder body (13) is provided with a retaining cylinder outer step (133), one end of the second spring presses against the retaining cylinder outer step (133), and the other end presses against the retaining ring body (15).

6. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 4, characterized in that, The female connector housing (11) is also provided with a limiting step (111), and an annular cavity corresponding to the limiting step (111) is provided between the female connector housing (11) and the steel ball mounting seat (16). Several floating steel balls (19) are located inside the annular cavity.

7. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 4, characterized in that, The quick-connect female connector (1) also includes a torsion spring seat (17) threaded onto the ball bearing mounting seat (16); One end of the first torsion spring is connected to the female connector housing (11), and the other end is connected to the torsion spring seat (17).

8. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 7, characterized in that, The ball bearing mounting base (16) is provided with a limiting ring protrusion (162); The ball mounting seat (16) is provided with an external thread, and the torsion spring seat (17) is provided with an internal thread that is compatible with the external thread, and the length of the external thread is greater than the length of the internal thread.

9. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 8, characterized in that, The torsion spring seat (17) is provided with an installation step (171) on the side opposite to the limiting ring protrusion (162).

10. The quick-connect female connector of a hydraulic quick-connect coupling system according to claim 1, characterized in that, The cone valve body (14) is provided with an inner ring groove (141) and an outer ring groove (142) for installing a sealing ring; The cone valve body (14) is slidably sealed to the female connector valve core (12) and the retaining cylinder body (13) through the sealing rings in the inner ring groove (141) and the outer ring groove (142), respectively.

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