pressure control mechanism

Abstract

The application provides a pressure control mechanism, comprising: a shell, an inner part of which is sequentially provided with a first cavity, a second cavity and a third cavity in communication, the first cavity being used for communicating with a device; a first valve body, provided with a first flange and a second flange, the first flange being movable between the first cavity and the second cavity, and the second flange being movable between the second cavity and the third cavity; an elastic assembly, located in the third cavity and sleeved on an outer periphery of the first valve body, one end of the elastic assembly being in abutment with the second flange, and the other end being in abutment with the shell; the elastic assembly comprising a first elastic member and a second elastic member in connection, the rigidity of the first elastic member being greater than that of the second elastic member. The pressure control mechanism provided by the application realizes more concise and efficient control of the pressure of a power device including a clutch and a brake.

Description

Technical Field

[0001] This invention relates to the field of pressure control technology, and more specifically to a pressure control mechanism. Background Technology

[0002] A clutch can cut off or transmit the power output from a prime mover. Under certain mechanisms, the coordinated action of multiple clutches can achieve the switching of different gears. A brake can decelerate, stop, or maintain a stopped state of moving parts, serving functions such as braking and positioning. Clutches and brakes have wide applications in industry. For friction clutches and disc brakes, engagement and disengagement are often achieved by the control system supplying or cutting off high-pressure working oil. Existing control systems for clutches and brakes often employ complex control valve groups to generate the working oil pressure required for clutch or brake engagement, resulting in increased control system weight and more complex control logic.

[0003] For the reasons mentioned above, simplifying the control system mechanism of clutches and brakes to achieve easier control and adjustment of clutches or brakes has become an urgent issue to be addressed. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure control mechanism for more concise and efficient control of the pressure of power equipment, including clutches and brakes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A pressure control mechanism, comprising: The housing has a first cavity, a second cavity, and a third cavity that are connected in sequence inside. The first cavity is used to communicate with a device. A first valve body is disposed through and movably disposed in the first cavity, the second cavity and the third cavity, and is fixedly provided with a first flange and a second flange. The first flange moves between the first cavity and the second cavity, and the second flange moves between the second cavity and the third cavity. The second valve body is movably disposed in the third cavity, with one side of the second valve body abutting against the first valve body and the other side abutting against or opposite to the housing; An elastic component is located in the third cavity and sleeved on the outer periphery of the first valve body. One end of the elastic component abuts against the second flange, and the other end abuts against the second valve body. The elastic component includes a first elastic element and a second elastic element that are connected to each other, wherein the stiffness of the first elastic element is greater than the stiffness of the second elastic element. The housing has a fourth through hole for connecting the first cavity and the third cavity. A feedback module is provided in the fourth through hole. The feedback module is electrically connected to the device and turns the fourth through hole on or off according to the instructions received by the device.

[0006] In some embodiments of the present invention, the housing has the following openings: The first through hole communicates with the first cavity and is used to connect with the first module of the device; The second through hole communicates with the first cavity and is used to connect with the second module of the device; The third through hole communicates with the second cavity and is used to connect with the third module of the device.

[0007] In some embodiments of the present invention, the feedback module is provided with a solenoid valve, which is used to receive instructions from the device and then open or close the fourth through hole.

[0008] In some embodiments of the present invention, the pressure control mechanism further includes a limiting member, which is sleeved on the outer periphery of one end of the first valve body located in the third cavity and abuts against the second valve body; The second elastic element is sleeved on the outer periphery of the limiting element.

[0009] In some embodiments of the present invention, the second valve body includes a base plate and a cylindrical wall that is connected to the outer edge of the base plate. The base plate and the cylindrical wall enclose a receiving cavity, which is connected to a portion of the third cavity. The cylindrical wall is fitted to the inner wall of the third cavity. One end of the first valve body located in the third cavity and the limiting member are both housed in the receiving cavity, and the limiting member abuts against the base plate.

[0010] In some embodiments of the present invention, a third flange is provided around the side of the cylindrical wall opposite to the receiving cavity, the third flange abuts against the inner wall of the third cavity, the third flange and the cylindrical wall divide the third cavity into a first region, a second region and a third region, the first region accommodates the second valve body, and the second region is provided with the fourth through hole; In this process, the working fluid in the first cavity enters the second region through the fourth through hole. The working fluid in the second region drives the third flange to move in the third cavity, thereby driving the second valve body to move toward the second flange. As a result, the volume of the first region and the third region decreases and the volume of the second region increases, or the volume of the first region and the third region increases and the volume of the second region decreases.

[0011] In some embodiments of the present invention, the pressure control mechanism further includes a diaphragm; The partition has a through hole, through which the first valve body passes, and the partition is located between the first elastic member and the second elastic member.

[0012] In some embodiments of the present invention, the pressure control mechanism further includes an adjusting member, which is attached to the side of the second flange opposite to the first flange, and the adjusting member abuts against the adjusting member.

[0013] In some embodiments of the present invention, a first port and a second port are respectively provided at both ends of the housing, the first port being connected to the first cavity and the second port being connected to the third cavity; The pressure control mechanism further includes a first end cap and a second end cap, the first end cap covering the first port and the second end cap covering the second port.

[0014] In some embodiments of the present invention, the housing is provided with a first enclosure structure, the first enclosure structure is disposed between the first cavity and the second cavity, the root of the first enclosure structure is fixedly connected to the inner wall of the first cavity and the second cavity, the free end of the first enclosure structure extends away from the inner wall of the first cavity and the second cavity, and the first flange abuts against the free end of the first enclosure structure.

[0015] In some embodiments of the present invention, the housing is provided with a second enclosure structure, the second enclosure structure is disposed between the second cavity and the third cavity, the root of the second enclosure structure is fixedly connected to the inner wall of the second cavity and the third cavity, the free end of the second enclosure structure extends away from the inner wall of the second cavity and the third cavity, and the second flange abuts against the free end of the second enclosure structure.

[0016] In some embodiments of the present invention, a fourth flange is provided around the circumferential surface of the end of the first valve body away from the third cavity, the fourth flange being received in the first port and fitting against the housing; Both the second flange and the fourth flange have annular grooves arranged around their outer peripheral surfaces, with the openings of the annular grooves facing the housing.

[0017] In some embodiments of the present invention, the pressure control mechanism has a first direction and a second direction that are perpendicular to each other; The first cavity, the second cavity, and the third cavity are arranged sequentially along the first direction, and the first flange and the second flange extend along the second direction; The dimension of the partition in the first direction is H1, and the dimension of the adjusting member in the first direction is H2; The first elastic member has a dimension of L1 in the first direction and in a free state, and a stiffness of k1. The second elastic member has a dimension of L2 in the first direction and in a free state, and a stiffness of k2. The limiting member has a dimension of L3 in the first direction. When the elastic component is not compressed, the distance between the second flange of the first valve body and the bottom plate of the second valve body in the first direction is L0. The first flange has a circular cross-sectional shape in the first direction, and the first flange has a dimension D in the second direction; The displacement of the first flange along the first direction is X1, and the displacement of the third flange along the first direction is X2; The pressure in the first cavity is P, where the magnitude of the first-stage pressure is P1 and the magnitude of the second-stage pressure is P2. in, , .

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: 1. The pressure control mechanism provided by this invention achieves the regulation of working oil pressure for power equipment, including clutches and brakes, in a simple and efficient manner, thereby realizing effective control of the engagement and disengagement processes of clutches and brakes. It also reduces the weight of the entire unit and simplifies the control logic. Specifically, two elastic elements with different stiffnesses are connected in series. One elastic element with greater stiffness is arranged around the outer periphery of the first valve body and abuts against the second flange on the first valve body, while the less stiff elastic element abuts against the second valve body. When the power equipment injects working fluid into the first cavity, the working fluid fills the first cavity and pushes the first valve body to move into the third cavity. At this time, the second flange of the first valve body compresses the elastic component. Due to the lower stiffness of the second elastic element, it preferentially experiences greater compression. The power equipment continuously injects working fluid into the first cavity. At this time, the second elastic element undergoes significant compression. As the working fluid continues to be injected, the elastic element is continuously compressed until the first cavity and the second cavity are connected. The working fluid in the first cavity will reach the first-level pressure value. The equipment receives a command and opens the fourth through hole, and the working fluid in the first cavity enters the third cavity. The working fluid compresses the first valve body and the second valve body at the same time. The second valve body moves towards the first cavity, continuously compressing the elastic element until the second elastic element reaches its compression limit. As the working fluid continues to be injected, the first valve body moves towards the third cavity. At this time, the first elastic element begins to undergo significant compression. When the first cavity and the second cavity are connected, the working fluid in the first cavity will reach the second-level pressure value. This achieves two-level pressure control for power equipment, including clutches and brakes.

[0019] 2. The pressure control mechanism provided by the present invention can adjust the working oil pressure of power equipment, including clutches and brakes, by using a combination of springs with different stiffnesses. It can meet the adjustment of working oil pressure for power equipment of different specifications and models, including clutches and brakes, simply by changing the stiffness of the springs, which has the advantages of simplicity and high efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a pressure control mechanism provided in a first state according to an embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the pressure control mechanism in the second state.

[0022] The main reference numerals in the accompanying drawings of this invention are explained as follows: 01 - First direction; 02 - Second direction; 1-Shell; 101-First through hole; 102-First port; 103-Second port; 11-First cavity; 12-Second cavity; 13-Third cavity; 131-First zone; 132-Second zone; 133-Third zone; 14-First enclosure structure; 15-Second enclosure structure; 201 - Third through hole; 21 - First flange; 22 - Second flange; 23 - Fourth flange; 24 - Annular groove; 3-Second valve body; 31-Base plate; 32-Cylinder wall; 33-Third flange; 41-First elastic element; 42-Second elastic element; 5-Limiting components; 6-September; 7-Adjusting components; 81-First end cap; 82-Second end cap. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention provides a pressure control mechanism, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of the present invention, and each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0025] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, a pressure control mechanism includes: a housing 1, wherein a first cavity 11, a second cavity 12, and a third cavity 13 are sequentially and interconnected inside the housing, the first cavity 11 being used to communicate with a device; a first valve body, which is movably disposed through and in the first cavity 11, the second cavity 12, and the third cavity 13, and is fixedly provided with a first flange 21 and a second flange 22, the first flange 21 being movable between the first cavity 11 and the second cavity 12, and the second flange 22 being movable between the second cavity 12 and the third cavity 13; and a second valve body 3, which is movably disposed in the third cavity 13, one side of the second valve body 3 abutting against the first valve body. The other side abuts or faces the housing 1; an elastic component is located in the third cavity 13 and sleeved on the outer periphery of the first valve body, one end of the elastic component abuts against the second flange 22, and the other end abuts against the housing 1; wherein, the elastic component includes a first elastic element 41 and a second elastic element 42 connected to each other, the stiffness of the first elastic element 41 is greater than the stiffness of the second elastic element 42; a fourth through hole (not shown) is provided on the housing 1 for connecting the first cavity 11 and the third cavity 13, a feedback module is provided in the fourth through hole, the feedback module is electrically connected to the device, and opens or closes the fourth through hole according to the instruction received by the device. The pressure control mechanism provided by this invention achieves simple and efficient regulation of the pressure and working oil pressure of power equipment, including clutches and brakes, thereby realizing effective control of the engagement and disengagement processes of clutches and brakes. It also reduces the overall weight of the unit and simplifies the control logic. Specifically, two elastic elements with different stiffnesses are connected in series (end-to-end). One of the elastic elements with greater stiffness (i.e., the first elastic element 41) is arranged around the outer periphery of the first valve body and abuts against the second flange 22 on the first valve body. Simultaneously, the less stiff elastic element (i.e., the second elastic element 42) abuts against the second valve body 3. When the device injects working fluid into the first cavity 11, the working fluid fills the first cavity 11 and pushes the first valve body. Moving towards the third cavity 13, the second flange 22 of the first valve body compresses the elastic component. Due to the lower stiffness of the second elastic element 42, it preferentially undergoes greater compression. The device continuously injects working fluid into the first cavity 11, causing the second elastic element 42 to be continuously compressed. When the first cavity 11 is connected to the second cavity 12, the working fluid in the first cavity 11 reaches the first-level pressure value. If the device receives an instruction and opens the fourth through hole, the working fluid in the first cavity 11 enters the third cavity 13. The working fluid simultaneously compresses the first valve body and the second valve body 3, causing the first elastic element 41 to begin to undergo significant compression. When the first cavity 11 is connected to the second cavity 12, the working fluid in the first cavity 11 will reach the second-level pressure value, thus achieving two-level pressure control for the device.Understandably, after the feedback module connects the first cavity 11 and the third cavity 13, the working fluid from the device can sequentially enter the third cavity 13 through the first through hole 101, the first cavity 11, and the fourth through hole. The working fluid in the third cavity 13 will exert a force on the second valve body 3, pushing the second valve body 3 towards the first cavity 11 and / or the first valve body, thereby compressing the elastic component. This forms a secondary pressure on the working fluid in the first cavity 11, whereby the second valve body 3 and the first valve body compress the elastic component together. It is worth noting that the feedback module determines when to connect the fourth through hole based on the instructions received by the device. Furthermore, it is understood that the instructions received by the device can be manually issued by the operator or automatically issued by the detection module in the device after detecting changes in specific parameters.

[0026] It is worth noting that the "device" described in this invention specification can be a power device, and in some specific embodiments, the device can be a power device including clutches and brakes; the "working fluid" described in this invention specification can be lubricating oil; therefore, the pressure control mechanism provided by this invention can realize two-stage pressure control for power devices including clutches and brakes, and can conveniently and efficiently provide two-stage oil pressure to power devices including clutches and brakes.

[0027] It is understood that in some embodiments of the present invention, springs with appropriate specifications and parameters may be selected as the first elastic element 41 and the second elastic element 42 according to the actual application scenario and specific design standards.

[0028] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the housing 1 has: a first through hole 101 communicating with the first cavity 11 and for connecting with the first module of the device; a second through hole communicating with the first cavity 11 and for connecting with the second module of the device; and a third through hole 201 communicating with the second cavity 12 and for connecting with the third module of the device. It is worth noting that in some embodiments of the present invention, the device can be a clutch or a brake. Accordingly, the first module can be the oil supply system of the clutch or brake, the second module can be the control oil circuit of the clutch or brake, and the third module can be the lubrication oil circuit of the clutch or brake.

[0029] In some embodiments of the present invention, the feedback module includes a solenoid valve, which receives instructions from the device to open or close the fourth through-hole. It is understood that the specifications and parameters of the solenoid valve can be selected according to the actual application scenario.

[0030] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the pressure control mechanism further includes a limiting member 5, which is sleeved on the outer periphery of one end of the first valve body located within the third cavity 13 and abuts against the second valve body 3; the second elastic member 42 is sleeved on the outer periphery of the limiting member 5. Obviously, as... Figure 1 and Figure 2 As shown, the hollow, tubular limiting member 5 allows at least a portion of the first valve body located at one end in the third cavity 13 to be inserted into the limiting member 5, thereby enabling the first valve body to move between the first cavity 11, the second cavity 12, and the third cavity 13. It is understood that the specific shape and size parameters of the limiting member 5 can be adjusted and selected according to actual application standards.

[0031] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the second valve body 3 includes a base plate 31 and a cylindrical wall 32 that is connected to the outer edge of the base plate 31. The base plate 31 and the cylindrical wall 32 enclose a receiving cavity 30, which communicates with a portion of the third cavity 13. The cylindrical wall 32 is fitted to the inner wall of the third cavity 13. One end of the first valve body located in the third cavity 13 and the limiting member 5 are both received in the receiving cavity 30, and the limiting member 5 abuts against the base plate 31. Specifically, after the fourth through hole connects the first cavity 11 and the third cavity 13, a portion of the working fluid originally located in the first cavity 11 enters the third cavity 13. This portion of the working fluid then pushes the second valve body 3 toward the first cavity 11 and / or the first valve body, thereby enabling the two valve bodies to compress the elastic component together to pressurize the working fluid located in the first cavity 11.

[0032] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, a third flange 33 is provided around the side of the cylindrical wall 32 opposite to the receiving cavity 30. The third flange 33 abuts against the inner wall of the third cavity 13. The third flange 33 and the cylindrical wall 32 divide the third cavity 13 into a first region 131, a second region 132, and a third region 133. The first region 131 accommodates the second valve body 3, and the second region 132 is provided with the fourth through hole. The working fluid in the first cavity 11 enters the second region 132 through the fourth through hole. The working fluid in the second region 132 drives the third flange 33 to move in the third cavity 13, thereby driving the second valve body 3 to move toward the second flange 22. As a result, the volume of the first region 131 and the third region 133 decreases and the volume of the second region 132 increases, or the volume of the first region 131 and the third region 133 increases and the volume of the second region 132 decreases. Obviously, the third flange 33 increases the contact area between the second valve body 3 and the working fluid entering the third cavity 13, thereby improving the pressure on the second valve body 3 from this part of the working fluid, so that this part of the working fluid can push the second valve body 3.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the pressure control mechanism further includes a partition 6; the partition 6 has a through hole through which the first valve body passes. The partition 6 is disposed between the first elastic member 41 and the second elastic member 42 to make the matching and connection relationship between the two elastic members more stable and reliable, and to avoid problems such as incorrect matching and connection between the two elastic members, such as insertion, embedding, and misalignment. It is understood that the shape and diameter of the through hole, the radial and thickness dimensions of the partition 6, and the material of the partition 6 can all be selected and adjusted according to the actual application scenario.

[0034] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the pressure control mechanism further includes an adjusting member 7, which is attached to the side of the second flange 22 opposite to the first flange 21, and abuts against the adjusting member 7. The function of the adjusting member 7 is to finely adjust the pressure of the working fluid in the first cavity 11 by replacing the specifications of the adjusting member 7 when the elastic component has been selected, so that the pressure control mechanism provided by the present invention has better versatility and ease of operation for more practical application scenarios. Obviously, the parameters of the adjusting member 7, including shape, size, and material, can be selected and adjusted according to the actual application scenario.

[0035] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, the housing 1 has a first port 102 and a second port 103 at its two ends, respectively. The first port 102 is connected to the first cavity 11, and the second port 103 is connected to the third cavity 13. The pressure control mechanism also includes a first end cap 81 and a second end cap 82, with the first end cap 81 covering the first port 102 and the second end cap 82 covering the second port 103. Specifically, the first end cap 81 and the first port 102 are detachably connected, for example, by a threaded connection; the second end cap 82 and the second port 103 are also detachably connected, for example, by a threaded connection. This design facilitates the operator's disassembly or installation of the pressure control mechanism provided by the present invention, and facilitates the removal of various valve bodies, elastic components, partitions 6, and adjusting components 7 from inside the housing 1, thereby facilitating the replacement of new components. Obviously, the dimensions of the first port 102, the second port 103, the first end cap 81, and the second end cap 82 can be selected or adjusted according to actual needs.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the housing 1 is provided with a first enclosure structure 14, which is disposed between the first cavity 11 and the second cavity 12. The root of the first enclosure structure 14 is fixedly connected to the inner wall of the first cavity 11 and the second cavity 12, and the free end of the first enclosure structure 14 extends away from the inner wall of the first cavity 11 and the second cavity 12. The first flange 21 abuts against the free end of the first enclosure structure 14. The first enclosure structure 14 serves to distinguish the first cavity 11 and the second cavity 12 and prevents the working medium in the first cavity 11 from freely exchanging with the working medium in the second cavity 12, so that the flow trend and pressure of the working medium in this pressure control mechanism are precisely controllable. It is understood that the specific dimensional parameters of the first enclosure structure 14 can be selected and adjusted according to actual design standards.

[0037] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, the housing 1 is provided with a second enclosure structure 15, which is disposed between the second cavity 12 and the third cavity 13. The root of the second enclosure structure 15 is fixedly connected to the inner wall of the second cavity 12 and the third cavity 13, and the free end of the second enclosure structure 15 extends away from the inner wall of the second cavity 12 and the third cavity 13. The second flange 22 abuts against the free end of the second enclosure structure 15. The second enclosure structure 15 serves to distinguish the second cavity 12 and the third cavity 13 and prevents the working medium in the second cavity 12 from freely exchanging with the working medium in the third cavity 13, so that the flow trend and pressure of the working medium in this pressure control mechanism are precisely controllable. It is understood that the specific size and shape of the second enclosure structure 15 can be designed, selected and adjusted according to the actual application scenario.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, a fourth flange 23 is provided around the circumferential surface of the end of the first valve body opposite to the third cavity 13. The fourth flange 23 is received in the first port 102 and fits against the housing 1. Annular grooves 24 are provided around the outer circumferential surfaces of both the second flange 22 and the fourth flange 23, with the openings of the annular grooves 24 facing the housing 1. This design allows the first valve body to move back and forth inside the housing 1, wherein the fourth flange 23 can move back and forth between the first port 102 and the first cavity 11, enabling the first valve body to compress and release the restoring elastic component. Obviously, the shape and size of the fourth flange 23 can be selected and adjusted according to the actual application scenario.

[0039] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the pressure control mechanism has a first direction 01 and a second direction 02 that are perpendicular to each other. Obviously, the first direction 01 is the same as the axial direction of the entire pressure control mechanism, the same as the axial direction of the first valve body, the same as the axial direction of the second valve body 3, and the same as the axial direction of the first elastic member 41 and the second elastic member 42. The first end cap 81 and the second end cap 82 are arranged opposite each other at their ends in the first direction 01, and the first port 102 and the second port 103 are arranged opposite each other at their ends in the first direction 01. The first valve body, the second valve body 3, the first elastic member 41, the second elastic member 42, the partition 6, and the limiting member 5 all move in the first direction 01. The second direction 02 is the same as the radial direction of the entire pressure control mechanism, the same as the radial direction of the first valve body, the same as the radial direction of the second valve body 3, and the same as the radial direction of the first elastic member 41 and the second elastic member 42.

[0040] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, the first cavity 11, the second cavity 12, and the third cavity 13 are sequentially arranged along the first direction 01, and the first flange 21 and the second flange 22 extend along the second direction 02; the dimension of the partition 6 in the first direction 01 is H1, and the dimension of the adjusting member 7 in the first direction 01 is H2; the dimension of the first elastic member 41 in the first direction 01 and in a free state is L1, and the stiffness of the first elastic member 41 is k1; the dimension of the second elastic member 42 in the first direction 01 and in a free state is L2, and the stiffness of the second elastic member 42 is k2; The dimension of the limiting member 5 in the first direction 01 is L3; when the elastic component is not compressed, the distance between the second flange 22 of the first valve body and the bottom plate 31 of the second valve body 3 in the first direction 01 is L0; the cross-sectional shape of the first flange 21 in the first direction 01 is circular, and the dimension of the first flange 21 in the second direction 02 is D; the displacement of the first flange 21 along the first direction 01 is X1, and the displacement of the third flange 33 along the first direction 01 is X2; the pressure in the first cavity 11 is P, wherein the magnitude of the first-stage pressure is P1, and the magnitude of the second-stage pressure is P2; wherein... , Obviously, the above dimensional parameters can be adjusted according to actual application requirements to obtain the required P1 and P2. (Reference) Figure 1 and Figure 2 , Figure 1 This is the state of the pressure control mechanism provided in one embodiment of the present invention when the first-level pressure P1 has not been reached; Figure 2 This describes the state of the pressure control mechanism provided in this embodiment when it reaches the second-level pressure P2. It is worth noting that in the accompanying drawings of this invention... Figure 1 This is a cross-sectional view of a pressure control mechanism provided in an embodiment of the present invention in a first state. The "first state" here refers to the state of the pressure control mechanism when it has not reached the first level pressure P1, rather than the state when the pressure control mechanism reaches the first level pressure P1.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of the present invention. The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention, and the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A pressure control mechanism, characterized in that, include: The housing (1) has a first cavity (11), a second cavity (12) and a third cavity (13) connected in sequence inside. The first cavity (11) is used to communicate with a device. A first valve body is disposed through and movably disposed in the first cavity (11), the second cavity (12) and the third cavity (13), and is fixedly provided with a first flange (21) and a second flange (22). The first flange (21) moves between the first cavity (11) and the second cavity (12), and the second flange (22) moves between the second cavity (12) and the third cavity (13). The second valve body (3) is movably disposed in the third cavity (13). One side of the second valve body (3) abuts against the first valve body, and the other side abuts against or is opposite to the housing (1). An elastic component is located in the third cavity (13) and sleeved on the outer periphery of the first valve body. One end of the elastic component abuts against the second flange (22), and the other end abuts against the second valve body (3). The elastic component includes a first elastic element (41) and a second elastic element (42) connected together. The stiffness of the first elastic element (41) is greater than that of the second elastic element (42). The first elastic element (41) and the second elastic element (42) are connected end to end. The first elastic element (41) is arranged around the outer periphery of the first valve body and abuts against the second flange (22). The second elastic element (42) abuts against the second valve body (3). The pressure control mechanism also includes a partition (6). The partition (6) has a through hole through which the first valve body passes. The partition (6) is located between the first elastic element (41) and the second elastic element (42). The housing (1) has a fourth through hole for connecting the first cavity (11) and the third cavity (13). A feedback module is provided in the fourth through hole. The feedback module is electrically connected to the device and turns the fourth through hole on or off according to the instructions received by the device.

2. The pressure control mechanism according to claim 1, characterized in that, The shell (1) has the following openings: The first through hole (101) is connected to the first cavity (11) and is used to connect to the first module of the device; The second through hole communicates with the first cavity (11) and is used to communicate with the second module of the device; The third through hole (201) is connected to the second cavity (12) and is used to connect to the third module of the device.

3. The pressure control mechanism according to claim 2, characterized in that, The feedback module includes a solenoid valve, which is used to receive instructions from the device and then open or close the fourth through hole.

4. The pressure control mechanism according to claim 2, characterized in that, The pressure control mechanism further includes a limiting member (5), which is sleeved on the outer periphery of one end of the first valve body located inside the third cavity (13) and abuts against the second valve body (3); The second elastic element (42) is sleeved on the outer periphery of the limiting element (5).

5. The pressure control mechanism according to claim 4, characterized in that, The second valve body (3) includes a base plate (31) and a cylindrical wall (32) that is connected to the outer edge of the base plate (31). The base plate (31) and the cylindrical wall (32) enclose a receiving cavity (30). The receiving cavity (30) is connected to a portion of the third cavity (13). The cylindrical wall (32) is in contact with the inner wall of the third cavity (13). One end of the first valve body located in the third cavity (13) and the limiting member (5) are both housed in the receiving cavity (30), and the limiting member (5) abuts against the bottom plate (31).

6. The pressure control mechanism according to claim 5, characterized in that, A third flange (33) is provided around the side of the cylindrical wall (32) away from the receiving cavity (30). The third flange (33) abuts against the inner wall of the third cavity (13). The third flange (33) and the cylindrical wall (32) divide the third cavity (13) into a first region (131), a second region (132) and a third region (133). The first region (131) accommodates the second valve body (3), and the second region (132) is provided with the fourth through hole. The working fluid in the first cavity (11) enters the second region (132) through the fourth through hole. The working fluid in the second region (132) drives the third flange (33) to move in the third cavity (13), thereby driving the second valve body (3) to move toward the second flange (22). As a result, the volume of the first region (131) and the third region (133) decreases and the volume of the second region (132) increases, or the volume of the first region (131) and the third region (133) increases and the volume of the second region (132) decreases.

7. The pressure control mechanism according to claim 6, characterized in that, The pressure control mechanism further includes an adjusting member (7), which is attached to the side of the second flange (22) away from the first flange (21), and the adjusting member (7) abuts against the adjusting member (7).

8. The pressure control mechanism according to claim 7, characterized in that, The housing (1) has a first port (102) and a second port (103) at its two ends respectively. The first port (102) is connected to the first cavity (11), and the second port (103) is connected to the third cavity (13). The pressure control mechanism further includes a first end cap (81) and a second end cap (82), the first end cap (81) covering the first port (102) and the second end cap (82) covering the second port (103).

9. The pressure control mechanism according to claim 8, characterized in that, The housing (1) is provided with a first enclosure structure (14), which is located between the first cavity (11) and the second cavity (12). The root of the first enclosure structure (14) is fixed to the inner wall of the first cavity (11) and the second cavity (12). The free end of the first enclosure structure (14) extends away from the inner wall of the first cavity (11) and the second cavity (12). The first flange (21) abuts against the free end of the first enclosure structure (14).

10. The pressure control mechanism according to claim 9, characterized in that, The housing (1) is provided with a second enclosure structure (15), which is located between the second cavity (12) and the third cavity (13). The root of the second enclosure structure (15) is fixed to the inner wall of the second cavity (12) and the third cavity (13). The free end of the second enclosure structure (15) extends away from the inner wall of the second cavity (12) and the third cavity (13). The second flange (22) abuts against the free end of the second enclosure structure (15).

11. The pressure control mechanism according to claim 10, characterized in that, A fourth flange (23) is provided around the circumferential surface of the end of the first valve body away from the third cavity (13). The fourth flange (23) is received in the first port (102) and fits against the housing (1). Both the second flange (22) and the fourth flange (23) have annular grooves (24) arranged around their outer peripheral surfaces, with the openings of the annular grooves (24) facing the housing (1).

12. The pressure control mechanism according to claim 11, characterized in that, The pressure control mechanism has a first direction (01) and a second direction (02) that are perpendicular to each other; The first cavity (11), the second cavity (12) and the third cavity (13) are arranged sequentially along the first direction (01), and the first flange (21) and the second flange (22) extend along the second direction (02); The dimension of the partition (6) in the first direction (01) is H1, and the dimension of the adjusting member (7) in the first direction (01) is H2; The first elastic member (41) has a dimension of L1 in the first direction (01) and in a free state, and the stiffness of the first elastic member (41) is k1. The second elastic member (42) has a dimension of L2 in the first direction (01) and in a free state, and the stiffness of the second elastic member (42) is k2. The limiting member (5) has a dimension of L3 in the first direction (01). When the elastic component is not compressed, the distance between the second flange (22) of the first valve body and the bottom plate (31) of the second valve body (3) in the first direction (01) is L0; The first flange (21) has a circular cross-section in the first direction (01), and the first flange (21) has a dimension D in the second direction (02); The displacement of the first flange (21) along the first direction (01) is X1, and the displacement of the third flange (33) along the first direction (01) is X2; The pressure in the first cavity (11) is P, where the magnitude of the first-stage pressure is P1 and the magnitude of the second-stage pressure is P2; in, , .

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