One-way oil return valve structure, electromagnetic valve and hydraulic oil way mechanism

Abstract

The utility model relates to the technical field of valve bodies, in particular to a one-way oil return valve structure, an electromagnetic valve and a hydraulic oil way mechanism, and the one-way oil return valve structure comprises a valve seat, a valve plate and an elastic piece. The valve seat comprises a disc body part and a sleeve part, and the sleeve part penetrates through the assembly through hole of the disc body part; one end of the elastic piece abuts against the valve plate, the elastic piece exerts acting force on the valve plate so that the valve plate can move towards the disc body part or tends to move, the other end, used for abutting against the valve plate, of the elastic piece is provided with an abutting end face matched with the plane of the valve plate, and the elastic piece pushes the valve plate through the abutting end face. According to the valve plate, the abutting end face matched with the plane of the valve plate is arranged, so that the contact area of the elastic piece and the valve plate is increased, and the elastic piece can evenly apply acting force to the valve plate. In this way, it is ensured that the valve plate is always perpendicular to the sleeve part in the process of being switched to the conduction position or the closed position, the situation that the valve plate is blocked on the sleeve part due to uneven stress is avoided, and therefore the stability and accuracy of movement of the valve plate are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valve bodies, in particular to a one-way oil return valve structure, an electromagnetic valve and a hydraulic oil path mechanism. BACKGROUND

[0002] In a fluid control system, a valve body is a key component, and its performance directly affects the stability and accuracy of the entire system. A valve plate is a core component of the valve body, and its movement state directly determines the control effect of oil flow. In the prior art, an elastic member is usually used as a driving force source for resetting the valve plate to achieve rapid response and accurate control of the valve plate.

[0003] However, in actual application, due to the inevitable errors in the manufacturing and installation process of the elastic member, the force exerted by the elastic member on the valve plate is often uneven. This uneven force can cause the valve plate to tilt during the resetting process, and then rub against the inner wall of the valve body or even get stuck, which seriously affects the normal operation of the valve body. This problem not only causes the oil flow control to be inaccurate, but also can cause system pressure fluctuations, and even cause equipment damage. Therefore, how to ensure that the elastic member exerts uniform force on the valve plate has become a key problem to be solved in the field of fluid control technology. CONTENT OF THE INVENTION

[0004] The purpose of the application is to provide a one-way oil return valve structure, an electromagnetic valve and a hydraulic oil path mechanism, wherein the valve plate of the one-way oil return valve structure is subjected to uniform force during resetting, thereby improving the oil flow control accuracy.

[0005] To achieve the above-mentioned purpose, in a first aspect, the application provides a one-way oil return valve structure, comprising:

[0006] a valve seat, the valve seat comprising a disc body part and a sleeve part, the disc body part being provided with an assembly through hole and a one-way channel in the axial direction, and the sleeve part being open at both ends and being arranged in the assembly through hole of the disc body part;

[0007] a valve plate, the valve plate being sleeved on the sleeve part, the valve plate having a conductive position and a closed position during sliding on the sleeve part, when in the closed position, the valve plate blocks the one-way channel, and when in the conductive position, the valve plate has a gap with the disc body part, and the one-way channel is in conduction;

[0008] an elastic member, one end of the elastic member abutting against the valve plate, the elastic member exerting a force on the valve plate to move or tend to move the valve plate towards the disc body part, and the other end of the elastic member for abutting against the valve plate being provided with an abutting end face adapted to the plane of the valve plate, and the elastic member pushing the valve plate through the abutting end face.

[0009] In an optional embodiment, further comprising:

[0010] a valve sleeve coaxially arranged with the disc body portion and abutting against the disc body portion, an end of the valve sleeve close to the disc body portion being open, an end of the valve sleeve away from the disc body portion having a bottom wall and the bottom wall being provided with a through opening, one end of the elastic member abutting against the valve plate, the other end of the elastic member abutting against the bottom wall of the valve sleeve.

[0011] In an optional embodiment, a limiting stepped surface is arranged on the inner wall of the valve sleeve, the limiting stepped surface being located on the axial movement path of the valve plate, and the valve plate abutting against the limiting stepped surface when the valve plate is located at the limit stroke of the through position.

[0012] In an optional embodiment, the limiting stepped surface and the valve plate have a gap in the radial direction.

[0013] In an optional embodiment, a first support ring body and a second support ring body are arranged on the disc body portion at the end face close to the valve plate, the first support ring body and the second support ring body are coaxially arranged with the disc body portion, and the diameter of the first support ring body is greater than the diameter of the second support ring body, the one-way channel is arranged on the disc body portion between the first support ring body and the second support ring body, and the valve plate abuts against the first support ring body and the second support ring body when the valve plate is at the closed position.

[0014] In an optional embodiment, a support protrusion is arranged on the disc body portion at the end face close to the valve plate, and the distance between the support protrusion and the sleeve portion in the radial direction is less than the distance between the second support ring body and the sleeve portion in the radial direction.

[0015] In an optional embodiment, the valve plate comprises a ring body portion and a support portion, one end of the support portion abutting against the outer circumferential surface of the sleeve portion, the other end of the support portion fixedly connected to the inner wall of the ring body portion, the ring body portion being sleeved on the sleeve portion, and an annular gap being formed between the hollow portion of the ring body portion and the outer circumferential surface of the sleeve portion.

[0016] The support portion is provided with at least two support portions, and the at least two support portions are equally spaced around the circumference of the sleeve portion.

[0017] In an optional embodiment, a radial through channel is arranged on the sleeve portion at the end close to the valve plate in the radial direction, and the number of the radial through channels is at least two, and the at least two radial through channels are equally spaced around the circumference of the sleeve portion.

[0018] In a second aspect, the application provides an electromagnetic valve, comprising:

[0019] a main valve body provided with a first oil port;

[0020] The one-way return valve structure according to any one of the preceding embodiments is arranged at the first oil port of the main valve body.

[0021] In a third aspect, the application provides a hydraulic oil circuit mechanism, comprising:

[0022] The electromagnetic valve according to the preceding embodiments.

[0023] In the present application, by arranging the abutting end face of the adapter valve plate plane, the contact area of the elastic member and the valve plate is increased, so that the elastic member can uniformly exert force on the valve plate. This ensures that the valve plate is always perpendicular to the sleeve during switching to the on position or the closed position, avoiding the valve plate from being stuck on the sleeve due to uneven force, thereby improving the stability and accuracy of the valve plate movement.

[0024] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 An exploded view of one embodiment of the one-way return valve structure provided by the present application from one perspective;

[0027] Figure 2 An exploded view of one embodiment of the one-way return valve structure provided by the present application from two perspectives;

[0028] Figure 3 A structural schematic diagram of one embodiment of the one-way return valve structure provided by the present application from two perspectives;

[0029] Figure 4 A Figure 3 Cross-sectional view along A-A direction;

[0030] Figure 5 A cross-sectional view of one embodiment of the hydraulic oil circuit mechanism provided by the present application from two perspectives;

[0031] Figure 6 A working state schematic diagram of one embodiment of the hydraulic oil circuit mechanism provided by the present application;

[0032] Figure 7Another working state schematic view of one of the embodiments of the hydraulic oil path mechanism provided in the present application;

[0033] Figure 8 Two view angle structural schematic views of another embodiment of the one-way oil return valve structure provided in the present application.

[0034] Icon:

[0035] 1000 - one-way oil return valve structure;

[0036] 100 - valve seat; 110 - disc body part; 120 - sleeve part; 130 - first support ring body; 140 - second support ring body; 150 - support protrusion; 160 - radial through channel; 180 - one-way channel;

[0037] 200 - valve plate; 210 - ring body part; 220 - support part;

[0038] 300 - elastic member; 310 - abutting end face;

[0039] 400 - valve sleeve; 410 - limiting stepped surface;

[0040] 2000 - electromagnetic valve; 2100 - main valve body;

[0041] 3000 - hydraulic oil path mechanism; 3100 - working cylinder; 3200 - piston rod; 3300 - intermediate cylinder; 3400 - oil storage cylinder. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms “inner”, “outer” and the like are based on the directions or position relationships shown in the drawings, or the directions or position relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Embodiments of the present application provide a one-way oil return valve structure 1000, a solenoid valve 2000 and a hydraulic oil circuit mechanism 3000.

[0046] As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300. Figures 1 to 4

[0047] As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300. Figure 1 As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0048] Figure 4 As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0049] The valve plate 200 has a through position and a closed position during sliding on the sleeve portion 120, as shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300. Figure 4 As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0050] As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0051] As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0052] As shown in the first aspect, embodiments of the present application provide a one-way oil return valve structure 1000, comprising a valve seat 100, a valve plate 200 and an elastic member 300.

[0053] As​​Figure 3 and Figure 4 As shown in FIG. 3, one end of the elastic member 300 abuts against the valve plate 200, and the other end of the elastic member 300 is fixed. The elastic member 300 exerts a force on the valve plate 200 to move or tend to move the valve plate 200 towards the disc body 110. The other end of the elastic member 300 used to abut against the valve plate 200 is provided with an abutting end face 310 adapted to the plane of the valve plate 200, and the elastic member 300 pushes the valve plate 200 through the abutting end face 310.

[0054] Exemplarily, the valve plate 200 is a circular ring plate body structure, and the abutting end face 310 is a circular ring end face adapted to the shape of the valve plate 200. In another embodiment, the valve plate 200 is an elliptical ring plate body structure, and the abutting end face 310 is an elliptical ring end face adapted to the shape of the valve plate 200.

[0055] Exemplarily, the elastic member 300 is a wave spring, the axis of the wave spring is parallel to the axis of the sleeve portion 120, and the contraction direction of the wave spring is parallel to the axis direction of the sleeve portion 120.

[0056] In another embodiment, the elastic member 300 is a conical coil spring or a cylindrical coil spring, etc. The axis of the elastic member 300 is parallel to the axis of the sleeve portion 120, the contraction direction of the elastic member 300 is parallel to the axis direction of the sleeve portion 120, and the end of the elastic member 300 abutting against the valve plate 200 has an abutting portion, and the end face of the abutting portion abutting against the valve plate 200 is the abutting end face 310.

[0057] By providing the abutting end face 310 adapted to the plane of the valve plate 200, the contact area between the elastic member 300 and the valve plate 200 is increased, so that the elastic member 300 can uniformly exert a force on the valve plate 200. This ensures that the valve plate 200 is always perpendicular to the sleeve portion 120 during switching to the on position or the closed position, avoids the valve plate 200 from being stuck on the sleeve portion 120 due to uneven force, and thus improves the stability and accuracy of the movement of the valve plate 200.

[0058] In order to provide a mounting basis for the elastic member 300, as shown in FIG. 4, in an embodiment, the one-way oil return valve structure 1000 further comprises a valve sleeve 400; as shown in FIG. 5, the valve sleeve 400 is coaxially arranged and abuts against the disc body 110. One end of the valve sleeve 400 close to the disc body 110 is an opening, and the other end of the valve sleeve 400 away from the disc body 110 has a bottom wall provided with a through port for passing oil. Figures 1 to 3 Figure 4 The other end of the elastic member 300 abuts against the bottom wall of the valve sleeve 400.

[0059] The one end of the elastic member 300 abuts against the valve plate 200, and the other end of the elastic member 300 abuts against the bottom wall of the valve sleeve 400.

[0060] ​For example, the valve sleeve 400 and the disc body 110 can be fixedly connected by welding, snap-fitting, threaded connection, adhesive bonding or integral molding. However, in another embodiment, a fixing sleeve is provided outside the valve sleeve 400 and the disc body 110, the outer wall of the valve sleeve 400 is interference-fitted with the inner wall of the fixing sleeve, and the outer wall of the disc body 110 is interference-fitted with the inner wall of the fixing sleeve.

[0061] For example, the elastic element 300 is always in a compressed state within the valve sleeve 400, so that the elastic element 300 can continuously apply force to the valve plate 200, so that the valve plate 200 is in the closed position or has a tendency to move towards the closed position, ensuring that the valve plate 200 can switch positions in a timely and accurate manner when the oil pressure changes, and realize the function of one-way oil return.

[0062] In this application, the valve sleeve 400 is coaxially arranged and abuts against the disc body 110, providing dedicated installation space for the elastic element 300. One end of the elastic element 300 abuts against the valve plate 200, and the other end abuts against the bottom wall of the valve sleeve 400. This clear installation method ensures that the elastic element 300 has a stable installation position in the one-way return valve structure 1000, avoiding displacement or shaking of the elastic element 300 during use, thereby ensuring that the elastic element 300 can stably perform its function.

[0063] In this application, the valve sleeve 400 effectively isolates the elastic element 300 from the oil flow area, reducing the direct impact and interference of the oil on the elastic element 300. During oil flow, pressure fluctuations and turbulence may occur, which can affect the performance of the elastic element 300. The isolation provided by the valve sleeve 400 reduces the impact of the oil on the elastic element 300, ensuring that the elastic element 300 can stably apply force to the valve plate 200, thus improving the operational stability of the one-way return valve structure 1000.

[0064] like Figure 4 As shown, in one embodiment, a limiting stepped surface 410 is provided on the inner wall of the valve sleeve 400. The limiting stepped surface 410 is located on the axial movement path of the valve plate 200. When the valve plate 200 is in the limit stroke of the conducting position, it abuts against the limiting stepped surface 410. This design sets a clear limit position for the axial movement of the valve plate 200, so that when the valve plate 200 moves under the action of oil pressure, it will not move arbitrarily due to lack of restriction, thus ensuring that the movement range of the valve plate 200 in the conducting position is controllable.

[0065] Because the stroke of the valve plate 200 is precisely limited, the one-way return valve structure 1000 maintains stable performance during operation. Excessive movement of the valve plate 200 will not affect the direction and flow rate of the oil.

[0066] When the valve plate 200 is about to move excessively under the impact of the oil, the limiting stepped surface 410 will prevent the valve plate 200 from continuing to move, thereby avoiding excessive pressure applied by the valve plate 200 to the elastic member 300. The elastic member 300 plays a key role in the one-way oil return valve structure 1000, continuously applying force to the valve plate 200 to keep the valve plate 200 in the closed position or have a tendency to move to the closed position. If the elastic member 300 is excessively compressed, its elastic properties may be degraded or even damaged, thereby affecting the normal operation of the one-way oil return valve structure 1000. The presence of the limiting stepped surface 410 effectively protects the elastic member 300, prolonging the service life of the elastic member 300.

[0067] By preventing the elastic member 300 from being excessively compressed, the limiting stepped surface 410 helps to maintain the stable elastic properties of the elastic member 300. Stable elastic properties can ensure that the elastic member 300 can always provide appropriate force to the valve plate 200, enabling the valve plate 200 to accurately respond to changes in oil pressure and achieve the function of one-way oil return. This not only improves the operational reliability of the one-way oil return valve structure 1000, but also reduces maintenance and replacement costs due to unstable performance of the elastic member 300.

[0068] As shown in FIG. 1, Figure 4 In one embodiment, the limiting stepped surface 410 has a gap in the radial direction with the valve plate 200.

[0069] When the valve plate 200 is switched to the open position by disengaging from the disc body 110, the oil discharged from the one-way channel 180 in the direction of the valve plate 200 can smoothly pass through the gap between the valve plate 200 and the limiting stepped surface 410 into the chamber of the valve sleeve 400, effectively avoiding the situation that the oil flow is blocked, so that the oil can flow more smoothly.

[0070] Smooth oil flow helps to maintain the stability of the system pressure, reduces pressure fluctuations caused by poor oil flow, thereby ensuring the stability of the operation and reducing the risk of failure caused by abnormal pressure.

[0071] Reasonable gap setting avoids excessive friction caused by direct contact or too small gap between the valve plate 200 and the limiting stepped surface 410, reduces the wear of the components, and prolongs the service life. At the same time, smooth oil flow also reduces the energy consumption of the system to overcome flow resistance, improving energy utilization efficiency.

[0072] The oil can quickly pass through the gap into the chamber of the valve sleeve 400, so that the valve plate 200 can quickly reach a new working state after switching position, speeding up the response speed of the mechanical structure to the control signal and improving the dynamic performance of the system.

[0073] As shown in FIG. 1, Figure 1 and Figure 4As shown, in one embodiment, the disc body part 110 is provided with a first support ring body 130 and a second support ring body 140 near the end face of the valve plate 200. Exemplarily, the first support ring body 130 and the second support ring body 140 are fixedly arranged on the disc body part 110 by welding, gluing, clamping or one-piece forming, etc.

[0074] As shown, the first support ring body 130 and the second support ring body 140 are coaxially arranged with the disc body part 110, and the diameter of the first support ring body 130 is greater than the diameter of the second support ring body 140. Exemplarily, the axial heights of the first support ring body 130 and the second support ring body 140 are equal. Figure 4

[0075] The one-way channel 180 is arranged between the first support ring body 130 and the second support ring body 140 on the disc body part 110.

[0076] Compared with directly abutting the end face of the disc body part 110, the valve plate 200 abuts the first support ring body 130 and the second support ring body 140 in the closed position, reducing the contact area, preventing excessive gaps due to insufficient flatness of the valve plate 200 and the disc body part 110, avoiding leakage, and ensuring the sealing performance of the valve plate 200 in the closed position.

[0077] To prevent the valve plate 200 from being deformed under pressure, as shown in Figure 1 and Figure 4 In one embodiment, the disc body part 110 is provided with a support protrusion 150 near the end face of the valve plate 200, and the radial distance between the support protrusion 150 and the sleeve part 120 is less than the radial distance between the second support ring body 140 and the sleeve part 120, so that the support protrusion 150 can support the plate body part of the valve plate 200 near the sleeve part 120, preventing the valve plate 200 from being deformed due to the force exerted on the valve plate 200 by the oil in the valve sleeve 400.

[0078] Exemplarily, the support protrusion 150 is fixedly arranged on the disc body part 110, for example by welding, clamping, gluing or one-piece forming, etc.

[0079] As shown, exemplarily, the support protrusion 150 is an arc-shaped block structure. Figure 1 Exemplarily, the arc-shaped block structure of the support protrusion 150 is arranged at equal intervals around the circumference of the sleeve part 120.

[0080] In another embodiment, the support protrusion 150 is an annular plate structure.

[0081]

[0082] ​​The direct contact of the first support ring body 130, the second support ring body 140 and the support protrusion 150 with the valve plate 200 forms a stable support structure, reduces the elastic deformation of the valve plate 200 under the action of high-pressure oil, improves the structural integrity of the valve plate 200, and effectively disperses the oil pressure to avoid deformation caused by excessive local stress on the valve plate 200. The setting of the support protrusion 150 significantly improves the anti-deformation ability of the valve plate 200 and prolongs the service life of the valve plate 200.

[0083] As shown in the drawings, Figure 1 In one embodiment, the valve plate 200 includes a ring body part 210 and a support part 220. One end of the support part 220 abuts the outer circumferential surface of the sleeve part 120, and the other end of the support part 220 is fixedly connected to the inner wall of the ring body part 210. The ring body part 210 is sleeved on the sleeve part 120, and there is an annular gap between the hollow part of the ring body part 210 and the outer circumferential surface of the sleeve part 120.

[0084] The support part 220 is provided at least two, and the at least two support parts 220 are distributed equidistantly around the circumference of the sleeve part 120.

[0085] In the present application, the support part 220 is provided at least two, and is distributed equidistantly around the circumference of the sleeve part 120, which effectively reduces the contact area between the valve plate 200 and the sleeve part 120. This significantly reduces the friction between the valve plate 200 and the sleeve part 120 during operation, reduces wear and tear, and prolongs the service life of the valve plate 200 and the sleeve part 120.

[0086] In the present application, the equidistantly distributed support part 220 makes the stress on the valve plate 200 more uniform, avoids the aggravation of wear caused by local stress concentration, and further improves the durability of the structure.

[0087] In the present application, due to the design of the support part 220, the contact area between the valve plate 200 and the sleeve part 120 is reduced, the resistance received by the valve plate 200 during operation is reduced, and the operation is more smooth. This helps to improve the response speed and action accuracy of the valve plate 200 and enhance the dynamic performance of the system.

[0088] In the present application, when the valve plate 200 is in the on position, the gap between adjacent support parts 220 can flow oil, and the gap between adjacent support parts 220 reduces the resistance of oil flow, ensuring smooth flow of oil.

[0089] Exemplarily, the support protrusion 150 is arranged at a position corresponding to the arrangement position of the support part 220, so that the support protrusion 150 is supported on the support part 220 of the valve plate 200.

[0090] As shown in the drawings, Figure 8As shown, in one embodiment, a radially conductive channel 160 is provided on one end of the sleeve portion 120 near the valve plate 200. The number of radially conductive channels 160 is at least two, and the at least two radially conductive channels 160 are arranged at equal intervals around the circumference of the sleeve portion 120.

[0091] For example, two radial conduction channels 160 are provided. In another embodiment, three radial conduction channels 160 are provided. In yet another embodiment, four radial conduction channels 160 are provided. Of course, in other embodiments, other numbers of radial conduction channels 160 may also be provided, such as five, six, or seven.

[0092] When the valve plate 200 is in the conducting position, even if it is not completely in the extreme position of the conducting position (the position where the valve plate 200 and the limiting step surface 410 of the valve sleeve 400 abut), the oil can still enter the sleeve portion 120 from the radial conducting channel 160, which improves the oil flow efficiency and significantly shortens the response time.

[0093] Traditional structures require the valve plate 200 to be fully open to achieve maximum flow, while this application can achieve a higher flow by partially opening the radial conduction channel 160, thus expanding the adjustment range of the valve plate 200.

[0094] Secondly, embodiments of this application provide a solenoid valve 2000, including a main valve body 2100 and a one-way return valve structure 1000 as described in any of the above embodiments.

[0095] like Figures 5 to 7 As shown, a first oil port is provided on the main valve body 2100; a one-way return valve structure 1000 is provided at the first oil port of the main valve body 2100, and the guide port on the valve sleeve 400 is connected to the first oil port. The oil in the main valve body 2100 can flow into the valve sleeve 400 from the first oil port and the guide port, or the oil in the valve sleeve 400 can flow into the main valve body 2100 from the guide port and the first oil port.

[0096] Thirdly, embodiments of this application provide a hydraulic circuit mechanism 3000, including a working cylinder 3100, a piston rod 3200, an intermediate cylinder 3300, an oil storage cylinder 3400, and a solenoid valve 2000 as described in the above embodiments.

[0097] like Figures 5 to 7As shown, the piston rod 3200 is slidably sealed in the working cylinder 3100, dividing the working cylinder 3100 into a first working chamber and a second working chamber. When the piston rod 3200 extends out of the working cylinder 3100, it compresses the first working chamber; when the piston rod 3200 retracts into the working cylinder 3100, it compresses the second working chamber. The first working chamber of the working cylinder 3100 is connected to the intermediate cylinder 3300, and the second working chamber of the working cylinder 3100 is connected to the oil storage cylinder 3400. One end of the sleeve portion 120 of the one-way return valve structure 1000 is connected to the intermediate cylinder 3300, and the other end of the sleeve portion 120 is located inside the valve sleeve 400. At the same time, the valve sleeve 400 is connected to the first oil port on the main valve body 2100 of the solenoid valve 2000. The main valve body 2100 is also provided with a flow passage for connecting to the oil storage cylinder 3400.

[0098] When the valve plate 200 is in the conducting position, one end of the one-way channel 180 on the disc body 110 is connected to the internal cavity of the valve sleeve 400, and the other end of the disc body 110 is connected to the oil reservoir 3400.

[0099] A valve plate is provided inside the main valve body 2100 of the solenoid valve 2000. Oil can enter the one-way channel 180 from the valve sleeve 400, and then enter the main valve body 2100 from the one-way channel 180. The oil in the main valve body 2100 can flow from the valve plate to the flow passage, and then be discharged from the flow passage to the oil storage cylinder 3400. The valve plate can prevent the oil at the flow passage from flowing from the valve plate to the first oil port.

[0100] like Figure 6 As shown, when the piston rod 3200 retracts into the working cylinder 3100, the piston rod 3200 compresses the volume of the second working chamber, and the volume of the first working chamber increases. The oil in the second working chamber is compressed and enters the oil storage cylinder 3400. The oil in the oil storage cylinder 3400 enters the one-way channel 180 of the disc body 110. The oil in the one-way channel 180 pushes the valve plate 200 to the conducting position. The oil enters the chamber of the valve sleeve 400 from the one-way channel 180. The oil in the valve sleeve 400 enters the intermediate cylinder 3300 from the sleeve part 120. When the piston rod 3200 retracts into the working cylinder 3100, the volume of the first working chamber increases, and the oil in the intermediate cylinder 3300 enters the first working chamber. The oil in the reservoir 3400 not only enters the valve sleeve 400 through the one-way channel 180, but also enters the main valve body 2100 through the flow hole. After entering the main valve body 2100, the oil pushes the valve plate in the main valve body 2100, and the valve plate blocks the oil from flowing from the flow hole to the first oil port. The valve plate is kept in the closed position by the push of the oil at the flow hole, thereby blocking the oil from flowing from the first oil port through the valve plate to the flow hole.

[0101] like Figure 7As shown, when the piston rod 3200 is extended from the working cylinder 3100, the volume of the first working chamber is reduced by compression of the piston rod 3200, and the volume of the second working chamber is increased; the oil in the first working chamber is extruded into the intermediate cylinder 3300, the oil in the intermediate cylinder 3300 enters the valve sleeve 400 from the sleeve part 120 of the valve seat 100, the oil in the valve sleeve 400 enters the main valve body 2100 from the first oil port, and the oil in the main valve body 2100 enters the oil storage cylinder 3400 from the flow-through hole. When the piston rod 3200 is extended from the working cylinder 3100, the volume of the second working chamber is increased, and the oil in the oil storage cylinder 3400 enters the second working chamber to fill the second working chamber.

[0102] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0103] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A one-way oil return valve structure characterized by comprising: The utility model relates to a valve seat (100) including a disc body part (110) and a sleeve part (120), the disc body part (110) is equipped with the assembly through -hole and one -way channel (180) in the axial direction, the sleeve part (120) both ends are open, the sleeve part (120) is equipped at the assembly through -hole of the disc body part (110); Valve plate (200), the valve plate (200) is sleeved on the sleeve part (120), the valve plate (200) has the open position and the closed position in the sleeve part (120) sliding process, when the closed position, the valve plate (200) blocks the one -way channel (180), when the open position, the valve plate (200) has the gap between the disc body part (110), and the one -way channel (180) is open; Elastic member (300), one end of the elastic member (300) abuts the valve plate (200), the elastic member (300) exerts force to the valve plate (200) and makes the valve plate (200) move or exist the tendency of moving to the disc body part (110), the other end of the elastic member (300) for abutting the valve plate (200) is provided with the abutting end face (310) of adapting the plane of the valve plate (200), and the elastic member (300) pushes the valve plate (200) through the abutting end face (310). Also including:

2. The one-way return valve structure according to claim 1, wherein Valve sleeve (400), the valve sleeve (400) is coaxial with the disc body part (110) and abuts, one end of the valve sleeve (400) is open near the disc body part (110), one end of the valve sleeve (400) has the bottom wall away from the disc body part (110) and is provided with the open mouth on the bottom wall, one end of the elastic member (300) abuts on the valve plate (200), the other end of the elastic member (300) abuts on the bottom wall of the valve sleeve (400). The inner wall of the valve sleeve (400) is provided with a limiting stepped surface (410), the limiting stepped surface (410) is located on the axial movement path of the valve plate (200), and the valve plate (200) abuts against the limiting stepped surface (410) when the valve plate (200) is located at the limit stroke of the open position.

3. The one-way return valve structure according to claim 2, wherein The limiting stepped surface (410) and the valve plate (200) have a gap in the radial direction.

4. The one-way return valve structure according to claim 3, wherein The disc body part (110) is provided with a first support ring body (130) and a second support ring body (140) at the end face near the valve plate (200), the first support ring body (130) and the second support ring body (140) are coaxial with the disc body part (110), and the diameter of the first support ring body (130) is greater than the diameter of the second support ring body (140), the one -way channel (180) is arranged between the first support ring body (130) and the second support ring body (140) on the disc body part (110), and the valve plate (200) abuts against the first support ring body (130) and the second support ring body (140) in the closed position.

5. The one-way return valve structure according to claim 1, wherein ​ 6. The one-way return valve structure according to claim 5, wherein The disc body part (110) is provided with a support protrusion (150) near the end face of the valve plate (200), and the radial distance between the support protrusion (150) and the sleeve part (120) is smaller than the radial distance between the second support ring body (140) and the sleeve part (120).

7. The one-way return valve structure according to claim 1, wherein The valve plate (200) comprises a ring body part (210) and a support part (220), one end of the support part (220) abuts against the outer circumferential surface of the sleeve part (120), the other end of the support part (220) is fixedly connected to the inner wall of the ring body part (210), the ring body part (210) is sleeved on the sleeve part (120), and the annular gap is formed between the hollow part of the ring body part (210) and the outer circumferential surface of the sleeve part (120). The support part (220) is provided with at least two support parts (220), and the at least two support parts (220) are equally spaced around the circumference of the sleeve part (120).

8. The one-way return valve structure according to claim 1, wherein The sleeve part (120) is provided with radial through channels (160) on the end near the valve plate (200) in the radial direction, the number of the radial through channels (160) is at least two, and the at least two radial through channels (160) are equally spaced around the circumference of the sleeve part (120).

9. An electromagnetic valve characterized by comprising: Comprising: A main valve body (2100) is provided with a first oil port; The one-way oil return valve structure (1000) according to any one of claims 1 to 8 is arranged at the first oil port of the main valve body (2100).

10. A hydraulic oil passage mechanism characterized by comprising: Comprising: The electromagnetic valve (2000) according to claim 9.

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