Pressure control structure and device

Abstract

The utility model discloses a pressure control structure and device. The pressure control structure comprises a valve body with an accommodating cavity inside; the valve body is further provided with an oil inlet and an oil outlet which are communicated with the containing cavity and arranged at intervals in the first direction. The adjusting valve element and the feedback valve element are movably arranged in the containing cavity and are connected through an elastic structure; the adjusting valve element and the feedback valve element divide the containing cavity into a first oil cavity, a second oil cavity, a third oil cavity and a fourth oil cavity in the first direction, and a feedback oil way communicating with the first oil cavity and the fourth oil cavity is further arranged in the valve body. The oil inlet is formed in the first oil cavity, and the oil outlet is formed in the second oil cavity; in the first direction, oil input from the oil inlet pushes the adjusting valve element to move in the direction away from the first oil cavity, so that the second oil cavity is communicated with the first oil cavity, and the feedback valve element is controlled to move in the direction close to the first oil cavity through on-off of the feedback oil way. By means of the technical characteristics, multi-stage flexible control over the oil pressure can be achieved.

Description

Technical Field

[0001] This application relates to the field of mechanical control technology, specifically a pressure control structure and device. Background Technology

[0002] In applications such as shipbuilding, vehicle manufacturing, and mechanical engineering, the operating mode of a device can be adjusted by regulating the oil pressure of the input fluid. For example, in vehicles, high-pressure oil can be used to control clutch engagement, gear shifting, and brake engagement.

[0003] In related technologies, complex control valve assemblies are typically used to regulate hydraulic pressure. Due to the complexity of the device and the large amount of hydraulic fluid used, the control valve assembly is heavy, and its control logic for pressure regulation also becomes complex. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this application is how to simplify the pressure control structure and improve the flexibility of oil pressure adjustment.

[0005] To address at least one of the aforementioned technical problems, this application discloses a pressure control structure and device.

[0006] According to one aspect of this application, a pressure control structure is provided, comprising:

[0007] The valve body has an internal accommodating cavity, and the valve body is also provided with an oil inlet and an oil outlet communicating with the accommodating cavity. The oil inlet and the oil outlet are arranged at intervals along the first direction.

[0008] The regulating valve core is movably disposed in the receiving cavity, and the regulating valve core divides the receiving cavity into a first oil chamber, a second oil chamber and a third oil chamber arranged at intervals along a first direction;

[0009] The feedback valve core is movably disposed in the accommodating cavity. The feedback valve core is located on one side of the regulating valve core in the first direction, and the feedback valve core and the regulating valve core are connected by an elastic structure.

[0010] The valve body also has a feedback oil circuit that connects the first oil chamber and the fourth oil chamber; the oil inlet is located in the first oil chamber and the oil outlet is located in the second oil chamber.

[0011] In the first direction, the oil input from the oil inlet pushes the regulating valve core to move away from the first oil chamber, so that the second oil chamber is connected to the first oil chamber.

[0012] Optionally, the pressure control structure also includes:

[0013] A conducting element is disposed in the feedback oil circuit. The conducting element is configured to selectively conduct the feedback oil circuit so that when the conducting element conducts the feedback oil circuit, the oil in the first oil chamber and the fourth oil chamber has a first oil pressure, and when the conducting element blocks the feedback oil circuit, the oil output from the first oil chamber has a second oil pressure, wherein the first oil pressure is greater than the second oil pressure.

[0014] Optionally, the regulating valve core includes:

[0015] Valve core body; and,

[0016] The first protrusion is provided on the outer peripheral wall of the valve core body and is connected to the inner wall of the accommodating cavity to serve as a separation between the second oil cavity and the third oil cavity in the accommodating cavity.

[0017] Optionally, the regulating valve core includes:

[0018] Valve core body; and,

[0019] A groove structure is provided on the outer peripheral wall of the valve core body; as the valve core body moves along the first direction and toward the second oil chamber, the second oil chamber is connected to the first oil chamber through the groove structure.

[0020] Optionally, the regulating valve core also includes:

[0021] The second protrusion protrudes from the outer peripheral wall of the valve core body, and the second protrusion is located on the side of the groove structure near the second oil cavity;

[0022] The valve body also has a partition between the oil inlet and the oil outlet. When no oil is input into the oil inlet, the second protrusion contacts the partition to block the second oil chamber and the first oil chamber. When oil is input into the oil inlet, the second oil chamber is connected to the first oil chamber through the groove structure.

[0023] Optionally, the regulating valve core also includes:

[0024] The third protrusion protrudes from the outer peripheral wall of the valve core body, and the third protrusion is located on the side of the groove structure away from the second oil chamber;

[0025] The third protrusion has a through hole, and the groove structure is connected to the cavity on the side of the third protrusion away from the groove structure through the through hole.

[0026] Optionally, the elastic structure is a spring structure.

[0027] Optionally, the elastic structure includes a spring structure and an adjusting element, wherein the feedback valve core, the spring structure, and the adjusting valve core are located in the accommodating cavity and are arranged sequentially along the first direction.

[0028] Optionally, the adjusting element is located between the spring structure and the feedback valve core, and is used to adjust the deformation force of the elastic structure in conjunction with the spring structure.

[0029] Optionally, the pressure control structure also includes an end cap that matches the valve body, the end cap being disposed on the valve body to close the fourth oil chamber.

[0030] Optionally, the fourth oil chamber is provided with an oil outlet, which is used to output oil with a first oil pressure from the fourth oil chamber.

[0031] According to another aspect of this application, an apparatus is provided, which is configured to include the pressure control structure as described above.

[0032] The pressure control structure of this application embodiment includes a regulating valve core and a feedback valve core connected by an elastic structure inside the valve body. When oil is input through the inlet, the oil in the first oil chamber controls the movement of the regulating valve core, and the oil entering the fourth oil chamber via the feedback oil path controls the movement of the feedback valve core. This allows the regulating valve core to push against the elastic structure independently or in conjunction with the feedback valve core, achieving multi-stage regulation of the oil pressure. The pressure control structure has a simple composition, and the combined action of the regulating valve core and the feedback valve core improves the flexibility of oil pressure regulation.

[0033] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0036] Figure 1 A first structural schematic diagram of a pressure control structure provided for an exemplary embodiment of this disclosure;

[0037] Figure 2 A schematic diagram of the valve body provided for an exemplary embodiment of this disclosure;

[0038] Figure 3 A schematic diagram of the structure corresponding to the regulating valve core provided in an exemplary embodiment of this disclosure;

[0039] Figure 4 A second structural schematic diagram of a pressure control structure provided for an exemplary embodiment of this disclosure;

[0040] Figure 5A third structural schematic diagram of a pressure control structure provided for an exemplary embodiment of this disclosure;

[0041] Figure 6 A schematic diagram of another pressure control structure provided as an exemplary embodiment of this disclosure.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10-Valve body, 11-Accommodation cavity, 12-Oil inlet, 13-Oil outlet, 14-First oil chamber, 15-Second oil chamber, 16-Third oil chamber, 17-Fourth oil chamber, 18-Feedback oil circuit, 19-Divider;

[0044] 20-Regulating valve core, 21-Valve core body, 22-First protrusion, 23-Groove structure, 24-Second protrusion, 25-Third protrusion, 26-Through hole;

[0045] 30 - Feedback valve core;

[0046] 40 - Elastic structure, 41 - Spring structure, 42 - Adjusting element;

[0047] 50 - Conducting element;

[0048] 60 - End cap, 61 - Oil outlet;

[0049] X1 - First displacement distance, X2 - Second displacement distance, L - Deformation displacement distance, D - First dimension. Detailed Implementation

[0050] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments in this specification. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without creative effort are within the scope of protection of this application.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0052] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0053] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0054] In this document, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0055] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0056] Please see Figures 1 to 3 , Figure 1 A first structural schematic diagram of a pressure control structure provided for an exemplary embodiment of this disclosure; Figure 2 A schematic diagram of the valve body provided for an exemplary embodiment of this disclosure; Figure 3 A schematic diagram of the structure corresponding to the regulating valve core provided for an exemplary embodiment of this disclosure.

[0057] This application discloses a pressure control structure, comprising:

[0058] The valve body 10 has an internal accommodating cavity 11, and the valve body 10 is also provided with an oil inlet 12 and an oil outlet 13 communicating with the accommodating cavity 11. The oil inlet 12 and the oil outlet 13 are arranged at intervals along the first direction X. The valve body 10 also has a partition 19 located between the oil inlet 12 and the oil outlet 13.

[0059] The regulating valve core 20 is movably disposed in the accommodating cavity 11, and the regulating valve core 20 can divide the accommodating cavity 11 into a first oil cavity 14, a second oil cavity 15 and a third oil cavity 16 arranged at intervals along the first direction X.

[0060] The feedback valve core 30 is movably disposed in the accommodating cavity 11. The feedback valve core 30 is located on one side of the regulating valve core 20 in the first direction X, and the feedback valve core 30 and the regulating valve core 20 are connected by an elastic structure 40; the elastic structure 40 is a spring structure 41.

[0061] The valve body 10 also has a feedback oil circuit 18 that connects the first oil chamber 14 and the fourth oil chamber 17; the oil inlet 12 is located in the first oil chamber 14 and the oil outlet 13 is located in the second oil chamber 15.

[0062] In the first direction X, the oil input from the oil inlet 12 pushes the feedback valve core 30 to move away from the first oil chamber 14, so that the second oil chamber 15 is connected to the first oil chamber 14.

[0063] In a specific embodiment, such as Figure 1 As shown, the pressure control structure may include a valve body 10, and a feedback valve core 30, an elastic structure 40, and a regulating valve core 20 located inside the valve body 10 and arranged at intervals along a first direction X. By inputting oil into the oil inlet 12, the regulating valve core 20 and the feedback valve core 30 are pushed against the elastic structure 40 by the oil, thereby achieving flexible adjustment of multi-stage hydraulic pressure. The pressure control structure can be applied to any scenario requiring oil pressure adjustment; in this application, it is described as being used in a vehicle to control the clutch and brake.

[0064] like Figure 2 As shown, the valve body 10 has a receiving cavity 11, a feedback oil passage 18, and an oil inlet 12 and an oil outlet 13 communicating with the receiving cavity 11, so that oil can be input and output. The structural arrangement of the regulating valve core 20 and the feedback valve core 30 can divide the receiving cavity 11 into a first oil chamber 14, a second oil chamber 15, a third oil chamber 16, and a fourth oil chamber 17 along the first direction X, so that when oil is input, oil can enter the first oil chamber 14 through the oil inlet 12 and enter the fourth oil chamber 17 through the feedback oil passage 18. The structural arrangement of the regulating valve core 20 can also make the second oil chamber 15 and the first oil chamber 14 connected when the regulating valve core 20 pushes against the elastic structure 40 along the first direction X.

[0065] In some embodiments, the two ends of the elastic structure 40 in the first direction X can be fixedly connected to the feedback valve core 30 and the regulating valve core 20 respectively, or they can be in contact with the feedback valve core 30 and the regulating valve core 20 respectively. The elastic structure 40 can be a spring structure 41, which can generate a deformation force corresponding to the amount of expansion and contraction by being compressed by the regulating valve core 20, or by being compressed by the feedback valve core 30 and the regulating valve core 20.

[0066] In addition, such as Figure 1As shown, the side wall of the feedback valve core 30 near the oil inlet 12 forms a deformation displacement distance L with the side wall of the regulating valve core 20 away from the oil inlet 12.

[0067] Please continue reading. Figure 1 and Figure 2 The pressure control structure includes a conducting element 50 disposed in the feedback oil passage 18. The conducting element 50 is configured to selectively conduct the feedback oil passage 18 such that when the conducting element 50 conducts the feedback oil passage 18, the oil in the first oil chamber 14 and the fourth oil chamber 17 has a first oil pressure, and when the conducting element 50 blocks the feedback oil passage 18, the oil output from the first oil chamber 14 has a second oil pressure, wherein the first oil pressure is greater than the second oil pressure.

[0068] The pressure control structure enables multi-stage pressure regulation. It also includes a conductive element 50 located in the feedback oil path 18. The conductive element 50 allows the pressure control structure to operate in two pressure regulation modes, achieving two-stage pressure regulation. Specifically, in the first regulation mode, the conductive element 50 activates the feedback oil path 18, while in the second regulation mode, the conductive element 50 blocks the feedback oil path 18.

[0069] In some embodiments, the conducting element 50 can be a solenoid valve capable of opening or closing the oil passage, and this application does not limit the specific location of the conducting element 50 in the feedback oil passage 18. By controlling the energization of the conducting element 50, the first oil chamber 14 and the fourth oil chamber 17 are connected, thereby allowing the oil input from the oil inlet 12 to enter the fourth oil chamber 17 from the first oil chamber 14. With the cooperation of the feedback valve core 30, the regulating valve core 20, and the elastic structure 40, the oil in the first oil chamber 14 and the fourth oil chamber 17 have a first oil pressure. The first oil pressure can be high-pressure oil and is used to control the engagement and disengagement of the clutch and brake.

[0070] In some embodiments, the first oil chamber 14 and the fourth oil chamber 17 can be disconnected by controlling the conduction element 50 to stop working. At this time, the regulating valve core 20, under the action of the oil input through the oil inlet 12, pushes against the elastic structure 40 along the first direction X and is displaced, so that the first oil chamber 14 and the second oil chamber 15 are connected, and the oil output from the first oil chamber 14 has a second oil pressure lower than the first oil pressure. The second oil pressure can be low-pressure oil.

[0071] Please continue reading. Figure 1 as well as Figure 2 The pressure control structure also includes an end cap 60 that matches the valve body 10. The end cap 60 covers the valve body 10 to seal the fourth oil chamber 17. The fourth oil chamber 17 is provided with an oil outlet 61, which is used to output oil with a first oil pressure from the fourth oil chamber 17. The oil outlet 61 allows for flexible control of the communication between the fourth oil chamber 17 and the outside world.

[0072] In some embodiments, the end cap 60 is disposed on the side of the valve body 10 near the feedback valve core 30 to form a closed fourth oil chamber 17 with the valve body 10. At the same time, an oil outlet hole 61 can be opened on the end cap 60 so that the oil with the first oil pressure in the fourth oil chamber 17 can be drawn out and introduced into the oil passage for the engagement and disengagement of the clutch and brake.

[0073] In other embodiments, the oil with the first oil pressure in the fourth oil chamber 17 can be drawn out by other methods, such as drawing out a connecting oil passage in the valve body 10 that communicates with the fourth oil chamber 17, and connecting the other end of the connecting oil passage to an oil passage that can control the engagement and disengagement of the clutch and brake. This application does not limit this.

[0074] Please see Figure 1 as well as Figure 3 The regulating valve core 20 includes: a valve core body 21, a first protrusion 22, a groove structure 23, a second protrusion 24, and a third protrusion 25.

[0075] The first protrusion 22 is provided on the outer peripheral wall of the valve core body 21 and is connected to the inner wall of the accommodating cavity 11 to divide the accommodating cavity 11 into a second oil cavity 15 and a third oil cavity 16.

[0076] In some embodiments, such as Figure 1 and Figure 3 As shown, the regulating valve core 20 includes a first protrusion 22 surrounding the outer peripheral wall of the valve core body 21. The first protrusion 22 is connected to the inner wall of the receiving cavity 11 to divide the receiving cavity 11, resulting in a second oil cavity 15 and a third oil cavity 16 that are not interconnected within the receiving cavity 11.

[0077] In some embodiments, since the regulating valve core 20 can move under the action of oil, the first protrusion 22 can be movably connected to the interior of the accommodating cavity 11.

[0078] The groove structure 23 is disposed on the outer peripheral wall of the valve core body 21; as the valve core body 21 moves along the first direction X and toward the second oil chamber 15, the second oil chamber 15 is connected to the first oil chamber 14 through the groove structure 23.

[0079] In some embodiments, the regulating valve core 20 is further provided with a groove structure 23 surrounding the outer peripheral wall of the valve core body 21. The accommodating cavity 11 has a first dimension along the second direction Y, and the dimension of the valve core body 21 along the second direction Y is smaller than the first dimension, so that a cavity is formed between the valve core body 21 and the inner wall of the accommodating cavity 11, and the cavity cooperates with the second protrusion 24 and the third protrusion 25 to form the groove structure 23.

[0080] When the regulating valve core 20 pushes against the elastic structure 40 along the first direction X, the regulating valve core 20 is displaced, and the groove structure 23 moves to the top of the oil outlet 13, so that the first oil chamber 14 is connected to the second oil chamber 15 through the groove structure 23, and the oil input from the oil inlet 12 can flow through the first oil chamber 14 and flow out through the oil outlet 13.

[0081] The second protrusion 24 protrudes from the outer peripheral wall of the valve core body 21, and the second protrusion 24 is located on the side of the groove structure 23 near the second oil chamber 15. When no oil is input into the oil inlet 12, the second protrusion 24 contacts the partition 19 to block the second oil chamber 15 and the first oil chamber 14. When oil is input into the oil inlet 12, the second oil chamber 15 is connected to the first oil chamber 14 through the groove structure 23.

[0082] In some embodiments, the regulating valve core 20 further includes a second protrusion 24 surrounding the outer peripheral wall of the valve core body 21, the second protrusion 24 being disposed close to the first protrusion 22. For example... Figure 1 and Figure 3 As shown, in this embodiment, the first protrusion 22 and the second protrusion 24 can be connected.

[0083] When no oil is supplied to the oil inlet 12, the second protrusion 24 contacts the partition 19 to block the communication between the second oil chamber 15 and the first oil chamber 14; Figure 1 As shown, the sum of the dimensions of the second protrusion 24 in the second direction Y and the dimensions of the valve core body 21 in the second direction Y can be equal to the first dimension D of the receiving cavity 11 near the oil inlet 12, so that the second protrusion 24 can contact the partition 19.

[0084] When oil is introduced into the oil inlet 12, the regulating valve core 20 pushes against the elastic structure 40 and is displaced along the first direction X under the action of the oil, so that part of the second protrusion 24 and part of the groove structure 23 are simultaneously located above the oil outlet 13, realizing the connection between the second oil chamber 15 and the first oil chamber 14.

[0085] The third protrusion 25 protrudes from the outer peripheral wall of the valve core body 21, and the third protrusion 25 is located on the side of the groove structure 23 away from the second oil cavity 15; the third protrusion 25 is provided with a through hole 26, and the groove structure 23 is connected to the cavity on the side of the third protrusion 25 away from the groove structure 23 through the through hole 26.

[0086] In some embodiments, the regulating valve core 20 further includes a third protrusion 25 circumferentially disposed on the outer peripheral wall of the valve core body 21, the third protrusion 25 being disposed away from the first oil chamber 14, and the groove structure 23 being located between the second protrusion 24 and the third protrusion 25.

[0087] like Figure 1 and Figure 3As shown, a through hole 26 is provided on the third protrusion 25 away from the oil inlet 12. The through hole 26 passes through the third protrusion 25 in the first direction X, so that the oil flowing into the groove structure 23 flows into the cavity on the side of the third protrusion 25 away from the groove structure 23 through the through hole 26, so that the regulating valve core 20 can be moved under the action of the oil, thereby pushing the elastic structure 40.

[0088] Specifically, the sidewalls of the second protrusion 24 and the third protrusion 25 are located on both sides of the groove structure 23, and their areas are the same. Therefore, when oil enters the first oil chamber 14 from the oil inlet 12, the regulating valve core 20 is subjected to the same hydraulic pressure along the first direction X to the left and along the first direction X to the right. At this time, the regulating valve core 20 cannot move under the action of the oil. By providing a through hole 26 on the third protrusion 25, the oil can flow from the position of the groove structure 23 to the cavity on the side of the third protrusion 25 away from the groove structure 23, and the regulating valve core 20 can move under the action of the oil.

[0089] In a specific application scenario of this application, a vehicle has a first control oil circuit for controlling the engagement or disengagement of a clutch / brake, and a second control oil circuit for lubricating the clutch / brake. A pressure control structure corresponds to a first adjustment mode and a second adjustment mode. The oil outlet 61 included in the pressure control structure can be connected to the first control oil circuit, and the oil outlet 13 included in the pressure control structure can be connected to the second control oil circuit.

[0090] Figure 4 A second structural schematic diagram of a pressure control structure provided for an exemplary embodiment of the present disclosure, corresponding to a second adjustment mode of the pressure control structure; Figure 5 This is a third structural diagram of a pressure control structure provided for an exemplary embodiment of the present disclosure, corresponding to a first adjustment mode of the pressure control structure. The following will be combined with... Figure 1 , Figure 4 and Figure 5 The two adjustment modes will be explained separately.

[0091] like Figure 1 and Figure 4As shown, when the pressure control structure corresponds to the second adjustment mode, the conducting element 50 is not energized and is in a stopped working state, and the feedback oil path 18 between the first oil chamber 14 and the fourth oil chamber 17 is blocked by the conducting element 50. When oil is input into the oil inlet 12, the oil flows into the first oil chamber 14 and pushes the regulating valve core 20 to move. The moving distance is the first displacement distance X1, and the elastic structure 40 is pushed by the regulating valve core 20 and deforms. At this time, there is no oil in the fourth oil chamber 17, the feedback valve core 30 has no displacement, the oil pressure is the second oil pressure, and part of the second protrusion and part of the groove structure 23 are located at the oil outlet 13 so that the oil outlet 13 is connected to the first oil chamber 14. The oil flows into the second control oil path through the oil outlet 13 to achieve lubrication of the clutch structure and brake structure.

[0092] like Figure 1 and Figure 5 As shown, when the pressure control structure corresponds to the first adjustment mode, the conducting element 50 is energized and in working condition, and the feedback oil path 18 between the first oil chamber 14 and the fourth oil chamber 17 is opened by the conducting element 50. When oil is input into the oil inlet 12, the oil flows into the first oil chamber 14 and into the fourth oil chamber 17 through the feedback oil path 18. The hydraulic pressure of the oil in the first oil chamber 14 acts on the regulating valve core 20, and the hydraulic pressure of the oil in the fourth oil chamber 17 acts on the feedback valve core 30. Since the hydraulic pressure has different effects on the feedback valve core 30 and the regulating valve core 20, the feedback valve core 30 first moves along the first direction X under the action of the hydraulic pressure and pushes against the elastic structure 40 until the feedback structure contacts the valve body 10 and stops moving. The moving distance of the feedback valve core 30 is the second displacement distance X2. The regulating valve core 20 moves along the first direction X under the action of the hydraulic pressure of the oil and pushes against the elastic structure 40 until the first oil chamber 14 is connected to the oil outlet 13 and stops moving. The elastic structure 40 deforms under the pressure of the feedback valve core 30 and the regulating valve core 20. At this time, oil is present in the fourth oil chamber 17, and the oil pressure is the first oil pressure. It flows into the first control oil circuit through the oil outlet 61 to realize the separation and engagement of the clutch structure and the brake structure. At the same time, the oil from the oil outlet 13 flows into the second control oil circuit to realize the lubrication of the clutch structure and the brake structure.

[0093] Another embodiment of this application, for example Figure 6 As shown, with Figures 1 to 5 The difference in the corresponding embodiments lies in the composition of the elastic structure 40. Please refer to [link / reference]. Figure 6 In this embodiment, the elastic structure 40 includes a spring structure 41 and an adjusting member 42. The feedback valve core 30, the spring structure 41 and the adjusting valve core 20 are located in the accommodating cavity 11 and are arranged sequentially along the first direction X.

[0094] The adjusting element 42 is located between the spring structure 41 and the feedback valve core 30, and is used to adjust the deformation force of the elastic structure 40 in conjunction with the spring structure 41.

[0095] In this embodiment, the working principle of the pressure control structure, as well as the structural arrangement, connection relationship, and function of the regulating valve core 20, valve body 10, feedback valve core 30, conducting element 50, end cap 60, etc., are the same as in the previous embodiment, and will not be repeated here. In addition, the dimensions, connection relationship, and function of the spring structure 41 in the elastic structure 40 are also the same as in the previous embodiment. The changes in the elastic structure 40 will be explained below.

[0096] Specifically, the elastic structure 40 includes a spring structure 41 and an adjusting member 42. The adjusting member 42 is disposed between the feedback valve core 30 and the spring structure 41. Compared with the previous embodiment, which uses the deformation force generated by the deformation of the spring structure 41 as the deformation force of the elastic structure 40, this embodiment, by changing the number of adjusting members 42, can further adjust the deformation force of the elastic structure 40 based on the deformation force corresponding to the deformation generated by the spring structure 41 being pushed, so that the pressure control structure can be adapted to application scenarios with different pressure requirements.

[0097] Let the thickness of the adjusting member 42 in the first direction X be H, the stiffness of the spring structure 41 be K, and the initial length of the spring structure 41 be L0. The pressure value P1 of the first oil can be calculated using the following formula:

[0098]

[0099] The pressure value P2 of the second oil pressure can be calculated using the following formula:

[0100]

[0101] Correspondingly, this application also discloses an apparatus configured to include the pressure control structure corresponding to any of the above embodiments.

[0102] In a specific application scenario, the device is configured as a forward and reverse gearbox with two clutches, two solenoid valves for forward and reverse, and the control system adopts the pressure control structure of this application.

[0103] When the speed and power of the prime mover are not required, the forward solenoid valve, the reverse solenoid valve, and the conducting element 50 in the pressure control structure are not connected. At this time, the oil outlet 13 of the pressure control structure provides lubricating oil to the clutch, but does not provide oil with the first oil pressure for controlling clutch engagement.

[0104] When the gearbox rotates forward, the conducting element 50 in the pressure control structure is activated, and oil with the first oil pressure flows through the oil outlet 61 and the oil passage connected to the forward solenoid valve to the forward clutch, thus engaging the forward clutch. When the gearbox rotates in reverse, the conducting element 50 in the pressure control structure is activated, and oil with the first oil pressure flows through the oil outlet 61 and the oil passage connected to the reverse solenoid valve to the reverse clutch, thus engaging the reverse clutch. The first oil pressure can be 1.99 MPa, the second oil pressure can be 0.50 MPa, and other parameters in the pressure control structure are shown in Table 1 below.

[0105] Table 1 Structural parameters of the pressure control structure

[0106]

[0107] By configuring the pressure control structure of this application into the device, flexible adjustment of multi-level pressure can be achieved. Compared with other solutions in related technologies, the pressure control structure of this application has the advantages of simple structure, light weight, and flexible control.

[0108] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0110] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0111] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent variations, or alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the market of the various embodiments, or to enable other persons skilled in the art to understand the various embodiments disclosed herein.

Claims

1. A pressure control structure, characterized in that, The pressure control structure includes: The valve body (10) has an internal accommodating cavity (11), and the valve body (10) is also provided with an oil inlet (12) and an oil outlet (13) communicating with the accommodating cavity (11). The oil inlet (12) and the oil outlet (13) are arranged at intervals along a first direction. The regulating valve core (20) is movably disposed in the accommodating cavity (11), and the regulating valve core (20) divides the accommodating cavity (11) into a first oil chamber (14), a second oil chamber (15) and a third oil chamber (16) arranged at intervals along the first direction; The feedback valve core (30) is movably disposed in the accommodating cavity (11). The feedback valve core (30) is located on one side of the regulating valve core (20) in the first direction. The feedback valve core (30) separates a fourth oil chamber (17) along the first direction. The feedback valve core (30) and the regulating valve core (20) are connected by an elastic structure (40). The valve body (10) also has a feedback oil path (18) that connects the first oil chamber (14) and the fourth oil chamber (17); the oil inlet (12) is located in the first oil chamber (14), and the oil outlet (13) is located in the second oil chamber (15); In the first direction, the oil input from the oil inlet (12) pushes the regulating valve core (20) to move away from the first oil chamber (14), so that the second oil chamber (15) is connected to the first oil chamber (14).

2. The pressure control structure according to claim 1, characterized in that, The pressure control structure also includes: A conducting element (50) is disposed in the feedback oil passage (18). The conducting element (50) is configured to selectively conduct the feedback oil passage (18) such that when the conducting element (50) conducts the feedback oil passage (18), the oil in the first oil chamber (14) and the fourth oil chamber (17) have a first oil pressure, and when the conducting element (50) blocks the feedback oil passage (18), the oil output from the first oil chamber (14) has a second oil pressure, wherein the first oil pressure is greater than the second oil pressure.

3. The pressure control structure according to claim 1, characterized in that, The regulating valve core (20) includes: Valve core body (21); and, The first protrusion (22) protrudes from the outer peripheral wall of the valve core body (21) and is connected to the inner wall of the accommodating cavity (11) to serve as a separation between the second oil cavity (15) and the third oil cavity (16) in the accommodating cavity (11).

4. The pressure control structure according to claim 1, characterized in that, The regulating valve core (20) includes: Valve core body (21); and, A groove structure (23) is provided on the outer peripheral wall of the valve core body (21); as the valve core body (21) moves along the first direction and toward the second oil chamber (15), the second oil chamber (15) is connected to the first oil chamber (14) through the groove structure (23).

5. The pressure control structure according to claim 4, characterized in that, The regulating valve core (20) also includes: The second protrusion (24) protrudes from the outer peripheral wall of the valve core body (21), and the second protrusion (24) is located on the side of the groove structure (23) near the second oil chamber (15); The valve body (10) also has a partition (19) located between the oil inlet (12) and the oil outlet (13); when no oil is input into the oil inlet (12), the second protrusion (24) contacts the partition (19) to block the second oil chamber (15) and the first oil chamber (14), while when oil is input into the oil inlet (12), the second oil chamber (15) is connected to the first oil chamber (14) through the groove structure (23).

6. The pressure control structure according to claim 4, characterized in that, The regulating valve core (20) also includes: The third protrusion (25) protrudes from the outer peripheral wall of the valve core body (21), and the third protrusion (25) is located on the side of the groove structure (23) away from the second oil chamber (15); The third protrusion (25) is provided with a through hole (26), and the groove structure (23) is connected to the cavity on the side of the third protrusion (25) away from the groove structure (23) through the through hole (26).

7. The pressure control structure according to claim 1, characterized in that, The elastic structure (40) is a spring structure (41).

8. The pressure control structure according to claim 1, characterized in that, The elastic structure (40) includes a spring structure (41) and an adjusting member (42). The feedback valve core (30), the spring structure (41), and the regulating valve core (20) are located in the accommodating cavity (11) and are arranged sequentially along the first direction.

9. The pressure control structure according to claim 8, characterized in that, The adjusting member (42) is located between the spring structure (41) and the feedback valve core (30) and is used to adjust the deformation force of the elastic structure (40) in conjunction with the spring structure (41).

10. The pressure control structure according to claim 1, characterized in that, The pressure control structure also includes an end cap (60) that matches the valve body (10), the end cap (60) covering the valve body (10) to close the fourth oil chamber (17).

11. The pressure control structure according to claim 10, characterized in that, The fourth oil chamber (17) is provided with an oil outlet (61), which is used to output oil with a first oil pressure from the fourth oil chamber (17).

12. An apparatus, characterized in that, The device is configured to include the pressure control structure as described in any one of claims 1-11.

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