A one-way valve and braking system

Abstract

The application relates to the technical field of valve bodies, and particularly discloses a one-way valve and a braking system, a through-flow hole and a mounting cavity are formed in the middle part of a valve seat, the through-flow hole and the mounting cavity are axially communicated, and an inner side wall of the mounting cavity forms a clamping groove; a spring seat comprises a framework and a buckle, the framework comprises a top ring bottom support and a connecting beam, the connecting beam connects the top ring and the bottom support, the buckle comprises a connecting part and a clamping part, the connecting part can be elastically deformed, a first end of the connecting part is arranged on the top ring, a second end of the connecting part extends to the bottom support, the clamping part is arranged on the second end, and the clamping part is clamped with the clamping groove; a valve core is arranged in the spring seat, and an elastic member makes the valve core always have a tendency to move to the side of the through-flow hole. In this way, the assembly reliability and convenience between the spring seat and the valve seat are improved.

Description

Technical Field

[0001] This invention relates to the field of valve body technology, and more particularly to a one-way valve and a braking system. Background Technology

[0002] In hydraulic systems, a check valve is often used to define the unidirectional flow direction of the fluid. When the oil flows in from the forward direction, the pressure will push the valve core open and the oil circuit will be connected. Once the oil attempts to flow in the reverse direction, the valve core will close the valve port under the action of hydraulic pressure and spring force, cutting off the oil circuit.

[0003] When the oil pushes open the valve core, the oil pressure is relatively high. The oil impacts the spring seat, causing the spring seat and valve seat to always tend to separate. Commonly, the spring seat and valve seat of a check valve adopt an interference fit. On the one hand, the interference fit has poor standardization during assembly, making it difficult to judge whether it is fully assembled. On the other hand, in order to be suitable for high pressure conditions, the interference amount is relatively large, making assembly difficult.

[0004] Therefore, there is an urgent need for a one-way valve and braking system to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a one-way valve and braking system that improves the ease of assembly while ensuring the reliability of the assembly of the spring seat and the valve seat.

[0006] On one hand, the present invention provides a one-way valve, the one-way valve comprising: The valve seat has a flow hole and a mounting cavity in the middle, the flow hole and the mounting cavity are connected axially, and the inner sidewall of the mounting cavity forms a groove. A spring seat, comprising a frame and a buckle, wherein the frame comprises a top ring, a bottom support, and a connecting beam, the top ring and the bottom support being spaced apart, the connecting beam connecting the top ring and the bottom support, and the buckle comprising a connecting portion and a snap-fit ​​portion, wherein the connecting portion is capable of elastic deformation, a first end of the connecting portion being disposed on the top ring, a second end of the connecting portion extending toward the bottom support, and a snap-fit ​​portion being disposed on the second end, the snap-fit ​​portion engaging with the slot. The valve core is placed inside the spring seat and can move relative to the spring seat along the axial direction of the mounting cavity. The valve core can form a circumferential seal with the first opening of the flow hole facing the mounting cavity. An elastic element is installed in the aforementioned spring seat, which causes the valve core to always tend to move toward the side where the flow hole is located.

[0007] As a preferred embodiment of the aforementioned one-way valve, the first opening is conical, extending along the axial direction of the flow passage from the flow passage to the mounting cavity, with the diameter of the first opening gradually increasing. The valve core is spherical, and the maximum radius of the valve core is greater than the minimum radius of the first opening.

[0008] As a preferred embodiment of the aforementioned one-way valve, the spring seat further includes a filter screen, and the frame supports the filter screen.

[0009] As a preferred embodiment of the aforementioned one-way valve, the aforementioned frame, the aforementioned filter screen, and the aforementioned buckle are all integrally molded parts.

[0010] As a preferred embodiment of the aforementioned one-way valve, the aforementioned filter screen and the aforementioned connecting beam are arranged alternately around the axis of the aforementioned top ring.

[0011] As a preferred embodiment of the aforementioned one-way valve, the valve seat is stepped along the axial direction of the aforementioned flow passage, including a large-diameter section and a small-diameter section. The diameter of the edge profile of the aforementioned large-diameter section is larger than the diameter of the edge profile of the aforementioned small-diameter section. The aforementioned flow passage is opened within the aforementioned large-diameter section, and a groove is formed between the aforementioned large-diameter section and the aforementioned small-diameter section. The groove is opened around the axis of the aforementioned flow passage, and the depth direction of the groove is parallel to the radial direction of the aforementioned flow passage.

[0012] As a preferred embodiment of the aforementioned one-way valve, multiple connecting beams and multiple buckles are provided, and the multiple buckles and multiple connecting beams are arranged alternately around the axis of the top ring.

[0013] As a preferred embodiment of the aforementioned one-way valve, the connecting beam extends axially along the top ring, and the connecting beam forms a guide rib on the inner side of the frame, allowing the valve core to abut against the guide rib radially along the top ring.

[0014] As a preferred embodiment of the aforementioned one-way valve, the connecting beam forms a limiting rib on the inner side of the aforementioned frame, and the valve core can abut against the limiting rib along the axial direction of the aforementioned top ring.

[0015] A braking system is also provided, including a brake fluid storage container, a piston cylinder, and the aforementioned one-way valve. The one-way valve is installed between the brake fluid storage container and the piston cylinder. The inlet end of the one-way valve is connected to the brake fluid storage container, and the outlet end of the one-way valve is connected to the piston cylinder.

[0016] The one-way valve provided by this invention has at least the following beneficial effects: The valve seat serves as the assembly base for the check valve. The flow holes and mounting cavity of the valve seat are arranged sequentially along the axial direction and are interconnected. The axial end of the flow hole connected to the mounting cavity serves as the outlet end of the check valve, and the axial end of the flow hole facing away from the mounting cavity serves as the inlet end of the check valve. A retaining groove is provided on the inner circumference of the mounting cavity. The top ring of the spring seat is equipped with a snap fastener, which includes a connecting part and a snap-fit ​​part. The snap-fit ​​part and the top ring are located at opposite ends of the connecting part along its length. The snap-fit ​​part is used to insert into the retaining groove to form a snap-fit ​​fit. During insertion, the snap-fit ​​part is abutted against the inner wall of the mounting cavity, causing it to deform inwards towards the frame. The connecting part of the snap fastener acts as a swing arm, undergoing elastic deformation, allowing the snap-fit ​​part to have a relatively large swing angle. Furthermore, the force exerted by the valve seat on the snap-fit ​​part is offset by the elastic deformation of the connecting part, preventing this force from being further transmitted to the top ring and causing it to deform under stress. The connecting beam extends axially along the flow passage, with the top ring and bottom support fixed at both ends to ensure that the top ring and bottom support are always spaced apart. The valve core and elastic element are installed inside the spring seat; the elastic element ensures that the valve core always tends to block the flow passage.

[0017] In use, the force exerted by the fluid at the inlet end of the check valve on the valve core is denoted as F. 进 The force exerted by the fluid at the outlet of the check valve on the valve core is denoted as F. 出 The force exerted by the elastic element on the valve core is denoted as F. 弹 If satisfied, F 进 >F 弹 +F 出 If the valve core disengages from the valve seat, the fluid at the inlet end can pass through the check valve, provided that F is satisfied. 进 <F 弹 +F 出 If the valve core blocks the flow hole, the fluid at the inlet end will be intercepted by the check valve.

[0018] This design simplifies the assembly structure and process by using a snap-fit ​​connection between the spring seat and the valve seat. Furthermore, the snap-fit ​​in the spring seat, through a connecting part that can elastically deform, not only increases the swing angle of the snap-fit ​​part but also absorbs the squeezing force exerted by the valve seat on the snap-fit ​​part during the insertion process, protecting the frame and thus maintaining the reliability of the assembly between the spring seat and the valve seat. Attached Figure Description

[0019] Figure 1 This is an isometric view of the one-way valve in an embodiment of the present invention; Figure 2 This is a front view of the one-way valve in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the one-way valve in an embodiment of the present invention; Figure 4 This is a top view of the valve seat in an embodiment of the present invention; Figure 5 for Figure 4 Sectional view at point AA; Figure 6 This is a schematic diagram of the spring seat in an embodiment of the present invention; Figure 7 This is a schematic diagram of the assembly of the one-way valve and the valve island in an embodiment of the present invention; Figure 8 This is a schematic diagram of the braking system in an embodiment of the present invention.

[0020] In the picture: 100. Check valve; 1. Valve seat; 11. Flow hole; 111. First opening; 112. Second opening; 12. Mounting cavity; 13. Slot; 1a. Large diameter section; 1b. Small diameter section; 14. Groove; 2. Spring seat; 21. Frame; 211. Top ring; 212. Bottom support; 213. Connecting beam; 214. Guide rib; 215. Limiting rib; 22. Filter screen; 23. Buckle; 231. Connecting part; 232. Snap-fit ​​part; 3. Valve core; 4. Elastic components; 200, Brake fluid storage container; 300, Piston cylinder; 400, Decoupling valve; 500, Pressure boosting valve; 600, Pressure supply valve; 700, Wheel cylinder; 800, Pressure reducing valve. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figures 1 to 7As shown, this embodiment provides a one-way valve 100, which includes a valve seat 1, a spring seat 2, a valve core 3, and an elastic element 4. The valve seat 1 has a flow hole 11 and a mounting cavity 12 in its middle, which are axially connected. The inner wall of the mounting cavity 12 forms a groove 13. The spring seat 2 includes a frame 21 and a latch 23. The frame 21 includes a top ring 211, a bottom support 212, and a connecting beam 213. The top ring 211 and the bottom support 212 are spaced apart, and the connecting beam 213 connects the top ring 211 and the bottom support 212. The latch 23 includes a connecting part 231 and a snap-fit ​​part 232. The connecting part 231 is capable of elastic deformation. The first end of the connecting part 231 is disposed on the top ring 211, and the second end of the connecting part 231 extends towards the bottom support 212. The snap-fit ​​part 232 is disposed on the second end and snaps into the slot 13. The valve core 3 is placed in the spring seat 2 and can move relative to the spring seat 2 along the axial direction of the mounting cavity 12. The valve core 3 can form a circumferential seal with the first opening 111 of the flow hole 11 facing the mounting cavity 12. The elastic element 4 is installed in the spring seat 2, and the elastic element 4 makes the valve core 3 always have a tendency to move towards the side where the flow hole 11 is located.

[0026] For example, the valve seat 1 serves as the assembly base for the one-way valve 100. The flow holes 11 and the mounting cavity 12 of the valve seat 1 are arranged sequentially along the axial direction and are connected. The axial end opening of the flow holes 11 connected to the mounting cavity 12 serves as the liquid outlet end of the one-way valve 100, and the axial end opening of the flow holes 11 facing away from the mounting cavity 12 serves as the liquid inlet end of the one-way valve 100. A slot 13 is provided on the inner circumferential side of the mounting cavity 12. The top ring 211 of the spring seat 2 is provided with a buckle 23, which includes a connecting part 231 and a snap-fit ​​part 232. The snap-fit ​​part 232 and the top ring 211 are respectively located at the beginning and end of the length direction of the connecting part 231. The snap-fit ​​part 232 is used to insert into the slot 13 to form a snap-fit ​​engagement. During the insertion process, the snap-fit ​​part 232 is abutted by the inner wall of the mounting cavity 12. The snap-fit ​​part 232 deforms towards the inner side of the frame 21. The connecting part 231 of the buckle 23 acts as a swing arm. Through its elastic deformation, the snap-fit ​​part 232 has a relatively large swing angle. The force exerted by the valve seat 1 on the snap-fit ​​part 232 is offset by the elastic deformation of the connecting part 231, preventing this force from being further transmitted to the top ring 211 and causing the top ring 211 to deform under force. The connecting beam 213 extends axially along the flow hole 11, and the top ring 211 and bottom support 212 are fixed at both ends of its length. The valve core 3 and the elastic element 4 are installed in the spring seat 2. The elastic element 4 makes the valve core 3 always tend to block the flow hole 11.

[0027] In use, the force exerted by the fluid at the inlet end of the one-way valve 100 on the valve core 3 is denoted as F. 进 The force exerted by the fluid at the outlet end of the one-way valve 100 on the valve core 3 is denoted as F. 出The force exerted by the elastic element 4 on the valve core 3 is denoted as F. 弹 If satisfied, F 进 >F 弹 +F 出 Then, valve core 3 disengages from valve seat 1, and fluid at the inlet end can pass through check valve 100, if F is satisfied. 进 <F 弹 +F 出 If the valve core 3 blocks the flow hole 11, the fluid at the inlet end will be intercepted by the check valve 100.

[0028] With this configuration, the snap-fit ​​between the spring seat 2 and the valve seat 1 simplifies the assembly structure and process. Furthermore, because the snap 23 in the spring seat 2 has a connecting part 231 that can elastically deform, it not only increases the swing angle of the snap-fit ​​part 232, but also absorbs the squeezing force exerted by the valve seat 1 on the snap-fit ​​part 232 during the insertion process, thus protecting the frame 21 and maintaining the reliability of the assembly between the spring seat 2 and the valve seat 1.

[0029] Furthermore, the flow hole 11 and the mounting cavity 12 are coaxially opened, and the diameter of the flow hole 11 is smaller than the diameter of the mounting cavity 12. The junction of the two forms an abutment surface, and the top ring 211 of the spring seat 2 can abut against the abutment surface axially.

[0030] Optionally, the first opening 111 is conical and extends along the axial direction of the flow hole 11 from the flow hole 11 to the mounting cavity 12. The diameter of the first opening 111 gradually increases, and the valve core 3 is spherical. The maximum radius of the valve core 3 is greater than the minimum radius of the first opening 111.

[0031] For example, the opening at the end of the flow passage 11 that connects to the mounting cavity 12 is denoted as the first opening 111. The first opening 111 is the output port of the flow passage 11. The cross-section of the first opening 111 is circular. Along the axial direction of the flow passage 11, from the flow passage 11 to the mounting cavity 12, the diameter of the first opening 111 gradually increases. The inner wall of the first opening 111 forms a conical surface, which acts as a guide. When the valve core 3 receives a force on the side opposite to the flow passage 11, the valve core 3 is more easily aligned with the flow passage 11 along the conical surface and completes the abutment seal against the flow passage 11. Furthermore, the conical design of the first opening 111 and the spherical design of the valve core 3 reduce the requirements for the machining accuracy of both and improve the service life. Even if wear occurs between the two, the valve core 3 can maintain the circumferential sealing effect by adaptively adjusting the insertion depth with the flow passage 11.

[0032] Optionally, the second opening 112 on the side of the flow passage 11 opposite to the mounting cavity 12 is conical, and the diameter of the second opening 112 gradually increases along the axial direction of the flow passage 11 from the mounting cavity 12 to the flow passage 11.

[0033] For example, the opening at the end of the flow passage 11 opposite to the mounting cavity 12 is called the second opening 112. The second opening 112 is the inlet of the flow passage 11. The cross-section of the second opening 112 is circular. Along the axial direction of the flow passage 11, from the mounting cavity 12 to the flow passage 11, the diameter of the second opening 112 gradually increases. The inner sidewall of the second opening 112 forms a conical surface. The conical surface plays a guiding role, so that the fluid can act more concentratedly on the valve core 3.

[0034] Optionally, the spring seat 2 also includes a filter screen 22, with the frame 21 supporting the filter screen 22.

[0035] For example, a filter screen 22 is provided between the top ring 211 and the bottom support 212, and the connecting beam 213 ensures that the top ring 211 and the bottom support 212 are always spaced apart, thereby keeping the filter screen 22 in an open state. Before the fluid passes through the flow hole 11, it is filtered by the filter screen 22, and impurities are intercepted outside the spring seat 2, allowing the relatively pure fluid to pass through the one-way valve 100.

[0036] Optionally, the frame 21, filter screen 22, and buckle 23 are integrally molded parts.

[0037] For example, the frame 21, the filter screen 22, and the buckle 23 are injection molded.

[0038] Optionally, the filter screen 22 and the connecting beam 213 are arranged alternately around the axis of the top ring 211.

[0039] For example, the connecting beam 213, the top ring 211 and the bottom support 212 form a frame 21 with a notch in the peripheral sidewall, and the filter screen 22 is installed on the frame 21, and the filter screen 22 forms a seal with the peripheral sidewall of the notch.

[0040] Optionally, along the axial direction of the flow passage 11, the valve seat 1 is stepped, including a large diameter section 1a and a small diameter section 1b. The diameter of the edge profile of the large diameter section 1a is larger than the diameter of the edge profile of the small diameter section 1b. The flow passage 11 is opened in the large diameter section 1a. A groove 14 is formed between the large diameter section 1a and the small diameter section 1b. The groove 14 is opened around the axis of the flow passage 11. The depth direction of the groove 14 is parallel to the radial direction of the flow passage 11.

[0041] For example, the valve island is used to install the check valve 100. The valve island has a mounting hole, which is a stepped hole including a large-diameter section and a small-diameter section. A shoulder is formed between the large-diameter section and the small-diameter section. The valve seat 1 is inserted into the mounting hole. The large-diameter section 1a is located in the large-diameter section, and the small-diameter section 1b is inserted in the small-diameter section. The shoulder formed between the large-diameter section 1a and the small-diameter section 1b abuts against the shoulder. The groove 14 corresponds to the position of the shoulder. During the assembly process, a force is applied to the large-diameter section 1a of the valve seat 1 in the axial direction towards the small-diameter section 1b. The shoulder and the shoulder abut against each other, causing the shoulder to be squeezed and plastically deformed. After part of the shoulder is deformed, it is inserted into the groove 14, thereby forming an axial relative fixation between the valve seat 1 and the valve island.

[0042] Optionally, multiple connecting beams 213 and multiple buckles 23 are provided, and the multiple buckles 23 and multiple connecting beams 213 are arranged in an alternating manner around the axis of the top ring 211.

[0043] For example, by providing multiple connecting beams 213, the top ring 211 and the bottom support 212 can always maintain relative fixation, thereby enhancing the structural strength of the frame 21 itself. Multiple latches 23 are provided, enabling a tight and stable connection between the top ring 211 and the valve seat 1. Furthermore, the connecting beams 213 and latches 23 are alternately distributed around the axis of the top ring 211, preventing mutual interference.

[0044] Optionally, the connecting beam 213 extends axially along the top ring 211, and the connecting beam 213 forms a guide rib 214 on the inner side of the frame 21, so that the valve core 3 can abut against the guide rib 214 radially along the top ring 211.

[0045] For example, a guide rail is formed between adjacent guide ribs 214, and the valve core 3 can move axially relative to the spring seat 2 along the guide rail. The guide ribs 214 can abut against the valve core 3 on the radial side of the top ring 211 to limit and regulate the movement trajectory of the valve core 3 relative to the spring seat 2.

[0046] Optionally, the connecting beam 213 forms a limiting rib 215 on the inner side of the frame 21, and the valve core 3 can abut against the limiting rib 215 along the axial direction of the top ring 211.

[0047] With this configuration, the limiting component 215 ensures that the valve core 3 and the bottom support 212 are always spaced apart, and the valve core 3 is close to the top ring 211, thereby shortening the stroke of the valve core 3 and making the valve core 3 respond faster.

[0048] like Figure 8As shown, a braking system is also provided, including a brake fluid storage container 200, a piston cylinder 300 and the aforementioned one-way valve 100. The one-way valve 100 is installed between the brake fluid storage container 200 and the piston cylinder 300. The inlet end of the one-way valve 100 is connected to the brake fluid storage container 200, and the outlet end of the one-way valve 100 is connected to the piston cylinder 300.

[0049] For example, the outlet end of the one-way valve 100 is connected to the rodless chamber of the piston cylinder 300, and the inlet end of the one-way valve 100 is connected to the output end of the brake fluid storage container 200. When the piston in the piston cylinder 300 moves towards the rodless chamber, due to the setting of the one-way valve 100, the fluid in the rodless chamber and the elastic element 4 press the valve core 3 against the valve seat 1, so that the fluid in the rodless chamber cannot enter the brake fluid storage container 200, but goes to the target cavity through other flow channels. When the piston in the piston cylinder 300 moves towards the rod chamber, the force of the fluid in the brake fluid storage container 200 on the valve core 3 is greater than the force of the elastic element 4. The elastic element 4 is squeezed and deformed, the valve core 3 is separated from the valve seat 1, the flow hole 11 is opened, and the fluid in the brake fluid storage container 200 enters the rodless chamber, realizing the replenishment of the piston cylinder 300.

[0050] Furthermore, the braking system also includes a decoupling valve 400, a booster valve 500, a pressure supply valve 600, a pressure reducing valve 800, and a wheel cylinder 700.

[0051] Under normal pressure build-up conditions, decoupling valve 400 is closed, pressure supply valve 600 is open, pressure boosting valve 500 is open, and pressure reducing valve 800 is closed. The piston in piston cylinder 300 is squeezed towards the rodless chamber side, and check valve 100 achieves pressure holding and sealing. The fluid in the rodless chamber flows sequentially through pressure supply valve 600 and pressure boosting valve 500 into wheel cylinder 700, and the pressure in wheel cylinder 700 rises, achieving the braking effect. After ABS is activated, decoupling valve 400 remains closed. In pressurization mode, pressure supply valve 600 and pressure boosting valve 500 open, while pressure reducing valve 800 closes. The piston in piston cylinder 300 is pushed towards the rodless chamber. Check valve 100 maintains pressure and creates a seal. Fluid in the rodless chamber flows sequentially through pressure supply valve 600 and pressure boosting valve 500 into wheel cylinder 700, causing pressure to rise in wheel cylinder 700. In pressure holding mode, pressure supply valve 600 opens, pressure boosting valve 500 closes, and pressure reducing valve 800 closes. The piston in piston cylinder 300 remains stationary, and pressure in wheel cylinder 700... Maintain constant pressure; in depressurization mode, pressure supply valve 600 is open, pressure boosting valve 500 is closed, pressure reducing valve 800 is open, piston in piston cylinder 300 remains stationary, fluid is pumped back to oil reservoir from wheel cylinder 700, and pressure in wheel cylinder 700 decreases; in replenishment mode, pressure supply valve 600 is closed, pressure boosting valve 500 is closed, pressure reducing valve 800 is closed, piston in piston cylinder 300 moves towards rod chamber, check valve 100 opens to replenish fluid, pumping brake fluid from brake fluid storage container 200 back to rod chamber of piston cylinder 300 through check valve 100.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A one-way valve, characterized in that, include: A valve seat (1) has an overflow hole (11) and a mounting cavity (12) in the middle. The overflow hole (11) and the mounting cavity (12) are connected axially. The inner sidewall of the mounting cavity (12) forms a groove (13). A spring seat (2) includes a frame (21) and a buckle (23). The frame (21) includes a top ring (211), a bottom support (212), and a connecting beam (213). The top ring (211) and the bottom support (212) are spaced apart. The connecting beam (213) connects the top ring (211) and the bottom support (212). The buckle (23) includes a connecting part (231) and a snap-fit ​​part (232). The connecting part (231) is capable of elastic deformation. The first end of the connecting part (231) is disposed on the top ring (211). The second end of the connecting part (231) extends toward the bottom support (212). The snap-fit ​​part (232) is disposed on the second end and snaps into the slot (13). The valve core (3) is placed inside the spring seat (2) and can move relative to the spring seat (2) along the axial direction of the mounting cavity (12). The valve core (3) can form a circumferential seal with the first opening (111) of the flow hole (11) facing the mounting cavity (12). An elastic element (4) is installed inside the spring seat (2), and the elastic element (4) causes the valve core (3) to always have a tendency to move toward the side where the flow hole (11) is located.

2. The one-way valve according to claim 1, characterized in that, The first opening (111) is conical and extends along the axial direction of the flow hole (11) from the flow hole (11) to the mounting cavity (12). The diameter of the first opening (111) gradually increases. The valve core (3) is spherical, and the maximum radius of the valve core (3) is greater than the minimum radius of the first opening (111).

3. The one-way valve according to claim 1, characterized in that, The spring seat (2) also includes a filter screen (22), and the frame (21) supports the filter screen (22).

4. The one-way valve according to claim 3, characterized in that, The frame (21), the filter (22), and the buckle (23) are all integrally formed.

5. The one-way valve according to claim 3, characterized in that, The filter screen (22) and the connecting beam (213) are arranged alternately around the axis of the top ring (211).

6. The one-way valve according to claim 1, characterized in that, Along the axial direction of the flow passage (11), the valve seat (1) is stepped, including a large diameter section (1a) and a small diameter section (1b). The diameter of the edge profile of the large diameter section (1a) is larger than the diameter of the edge profile of the small diameter section (1b). The flow passage (11) is opened in the large diameter section (1a). A groove (14) is formed between the large diameter section (1a) and the small diameter section (1b). The groove (14) is opened around the axis of the flow passage (11). The depth direction of the groove (14) is parallel to the radial direction of the flow passage (11).

7. The one-way valve according to claim 1, characterized in that, Multiple connecting beams (213) and multiple buckles (23) are provided, and the multiple buckles (23) and multiple connecting beams (213) are arranged alternately around the axis of the top ring (211).

8. The one-way valve according to claim 1, characterized in that, The connecting beam (213) extends axially along the top ring (211), and the connecting beam (213) forms a guide rib (214) on the inner side of the skeleton (21). The valve core (3) can abut against the guide rib (214) radially along the top ring (211).

9. The one-way valve according to claim 1, characterized in that, The connecting beam (213) forms a limiting rib (215) on the inner side of the frame (21), and the valve core (3) can abut against the limiting rib (215) along the axial direction of the top ring (211).

10. A braking system, characterized in that, The device includes a brake fluid storage container (200), a piston cylinder (300), and a one-way valve (100) as described in any one of claims 1-9. The one-way valve (100) is installed between the brake fluid storage container (200) and the piston cylinder (300). The inlet end of the one-way valve (100) is connected to the brake fluid storage container (200), and the outlet end of the one-way valve (100) is connected to the piston cylinder (300).

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