Check valve, braking system, and vehicle

Abstract

The embodiment of the application provides a one-way valve, a brake system and a vehicle, and relates to the technical field of automobile braking. The one-way valve comprises a connecting piece, a liquid path channel is arranged in the connecting piece, one end of the liquid path channel is used for communicating with a liquid storage tank of a brake system, and the other end of the liquid path channel is used for communicating with a brake cavity of a hydraulic pump of the brake system; a valve rod is slidably arranged in the liquid path channel, one end of the valve rod is used for abutting against or being separated from an inner wall of the liquid path channel, so as to close or open the liquid path channel; an elastic piece is connected with the valve rod, and the elastic piece is used for driving the valve rod to abut against the inner wall of the liquid path channel; and an adjusting piece is connected with the connecting piece, and the adjusting piece is used for adjusting the abutting force between the valve rod and the inner wall of the liquid path channel. The one-way valve, the brake system and the vehicle can drive a secondary piston of a brake caliper to return to an original position, prevent continuous friction between brake pads and a brake disc, and thus prolong the service life of the brake pads and the brake disc.

Description

Technical Field

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

[0002] A vehicle's braking system is a system that uses mechanical, hydraulic, or electronic devices to convert the force exerted by the driver pressing the brake pedal into braking force, thereby slowing down or stopping the wheels and bringing the car to a stop.

[0003] In related technologies, the braking system includes a brake pedal, a hydraulic pump, a reservoir, a check valve, and a brake caliper. During braking, when the driver depresses the brake pedal, the main piston of the hydraulic pump is pushed. At this time, the check valve is closed, preventing brake fluid from flowing from the hydraulic pump to the reservoir. The brake fluid in the brake chamber of the hydraulic pump is forced into the brake caliper, pushing the secondary piston in the caliper to clamp the brake pads onto the brake disc to generate braking force. When the driver releases the brake pedal, the secondary piston moves back under the action of the return spring, and the main piston moves back simultaneously, pushing the brake fluid back into the brake chamber of the hydraulic pump. At the same time, this backflow process creates a negative pressure in the hydraulic pump, drawing open the check valve and allowing the brake fluid in the reservoir to replenish the hydraulic pump, compensating for fluid loss and preparing for the next braking action.

[0004] However, to prevent brake fluid from leaking from the gap between the secondary piston and the brake caliper, a sealing ring is fitted onto the secondary piston. After the brake pedal is released, the secondary piston experiences resistance during its return movement due to the tight fit between the sealing ring and the inner wall of the brake caliper, resulting in a dragging torque. This prevents the secondary piston from fully returning to its initial position. As the wheel rotates, continuous friction occurs between the brake pads and the brake disc, accelerating the wear of the brake pads and brake disc and thus shortening their service life. Utility Model Content

[0005] This application provides a one-way valve, a braking system, and a vehicle to solve the technical problem in related technologies where the auxiliary piston of the brake caliper generates drag torque, which exacerbates the wear of brake pads and brake discs, thereby shortening their service life.

[0006] In a first aspect, embodiments of this application provide a one-way valve, comprising:

[0007] A connector, wherein a hydraulic passage is provided inside the connector, one end of the hydraulic passage is used to communicate with the reservoir of the braking system, and the other end of the hydraulic passage is used to communicate with the brake chamber of the hydraulic pump of the braking system;

[0008] A valve stem is slidably disposed within the liquid passage, and one end of the valve stem is used to abut or disengage from the inner wall of the liquid passage to close or open the liquid passage.

[0009] An elastic element is connected to the valve stem and is used to drive the valve stem to abut against the inner wall of the liquid passage.

[0010] An adjusting component is connected to the connecting component, and the adjusting component is used to adjust the contact force between the valve stem and the inner wall of the liquid passage.

[0011] In some embodiments, the adjusting member includes a valve body and a driving part, the valve body is connected to the connecting member, the valve stem is slidably connected to the valve body, and the driving part is used to drive the valve stem closer to or away from the inner wall of the liquid passage to adjust the contact force between the valve stem and the liquid passage.

[0012] In some embodiments, the driving part includes an abutment part and a magnetizing part. The abutment part is slidably connected to the valve body, and the magnetizing part is connected to the connector. The magnetizing part is used to magnetize one of the valve body and the abutment part after a preset current is applied, so that the valve body and the abutment part are magnetically attracted to each other, and the abutment part abuts against the valve stem, thereby driving the valve stem closer to the inner wall of the liquid passage.

[0013] In some embodiments, the magnetization part includes an electromagnetic coil arranged circumferentially along the valve body, and the electromagnetic coil is used to magnetize one of the valve body and the abutment part after the preset current is applied.

[0014] In some embodiments, a magnetic shielding tube is further included, which is disposed between the valve body and the magnetizing part, the magnetic shielding tube is sleeved on the valve body, and the abutment part is slidably connected inside the magnetic shielding tube.

[0015] In some embodiments, a plug rod is provided on one of the abutment portion and the valve stem, and a plug groove is provided on the other of the abutment portion and the valve stem, wherein the plug rod is used to insert into or disengage from the plug groove.

[0016] In some embodiments, the connector includes a valve block and a support base, the fluid passage includes a first connecting portion and a second connecting portion, the first connecting portion is disposed on the valve block, the second connecting portion is disposed on the support base, the support base is located inside the first connecting portion, the second connecting portion communicates with the first connecting portion, one end of the first connecting portion is used to communicate with the liquid storage tank, the other end of the first connecting portion is used to communicate with the brake chamber, and the valve stem is slidably connected inside the support base.

[0017] In some embodiments, a first sealing element is provided on the valve stem along the circumference of the valve stem, the first sealing element being used to abut against the inner wall of the second communicating portion, and / or, a second sealing element is provided on the outer wall of the support seat along the circumference of the support seat, the second sealing element being used to abut against the inner wall of the first communicating portion.

[0018] Secondly, embodiments of this application provide a braking system, including a system body and a one-way valve disposed on the system body.

[0019] Thirdly, embodiments of this application provide a vehicle, including a vehicle body and a braking system disposed on the vehicle body.

[0020] This application provides a one-way valve, a braking system, and a vehicle. The one-way valve provided in this application, when the driver releases the brake pedal, causes the secondary piston inside the brake caliper to move back under the action of a return spring, pushing the brake fluid back into the brake chamber of the hydraulic pump. An adjusting component increases the contact force between the valve stem and the inner wall of the fluid passage. At this time, the valve stem and the inner wall of the fluid passage remain in contact, preventing the valve stem from opening the fluid passage. Brake fluid cannot be replenished from the reservoir into the brake chamber of the hydraulic pump. As the main piston of the hydraulic pump moves back, the volume of brake fluid in the brake chamber should increase. However, because the valve stem closes the fluid passage, no external brake fluid is injected into the brake chamber. This increased space cannot be filled by newly added brake fluid, resulting in a higher negative pressure (pressure lower than atmospheric pressure). This negative pressure generates a reverse suction force, assisting the secondary piston of the brake caliper to move back. This increases the gap between the brake pads and the brake disc, reducing drag torque and preventing continuous friction between the brake pads and the brake disc, thereby indirectly extending the service life of the brake pads and brake disc. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a structural schematic diagram of the one-way valve in the assembled state of this application;

[0023] Figure 2 A schematic diagram of the one-way valve provided in this application;

[0024] Figure 3 for Figure 2 A structural schematic diagram of the central support base, valve stem, and adjusting components;

[0025] Figure 4 for Figure 2 A schematic diagram of the structure of the middle valve block.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Connector; 110. Liquid passage; 111. First connecting part; 1111. First connecting section; 1112. Second connecting section; 112. Second connecting part;

[0028] 120. Valve block; 121. Groove; 122. Fixing groove;

[0029] 130. Support base; 131. Liquid inlet; 132. Liquid outlet; 133. Inclined surface; 134. Second seal;

[0030] 200, Valve stem; 210, Abutment plate; 220, Connecting rod; 230, First seal; 240, Insert rod;

[0031] 300. Elastic components;

[0032] 400. Adjusting component; 410. Valve body; 420. Drive unit; 421. Abutment part; 422. Magnetizing part; 424. Insertion groove;

[0033] 500, Magnetic shielding tube;

[0034] 600, reservoir; 610, hydraulic pump; 611, brake chamber; 612, main piston; 620, brake caliper; 621, auxiliary piston.

[0035] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0037] In related technologies, an automotive braking system includes a brake pedal, a hydraulic pump, a reservoir, a check valve, and a brake caliper. When the driver depresses the brake pedal, a lever mechanism transmits force to the hydraulic pump, pushing the main piston of the hydraulic pump forward. At this time, the check valve automatically closes under hydraulic pressure, effectively blocking the flow of brake fluid into the brake chamber of the brake pump. The brake fluid already in the brake chamber of the hydraulic pump is forced into the hydraulic pressure chamber of the brake caliper through the hydraulic lines under the pressure of the main piston. The secondary piston of the brake caliper, under hydraulic pressure, extends outward, pushing the brake pads to tightly clamp the brake disc, generating braking force through friction.

[0038] When the driver releases the brake pedal, the secondary piston begins to move back under the elastic restoring force of the return spring. At the same time, the brake fluid drives the primary piston to move back synchronously. This process pushes the brake fluid from the brake caliper back into the hydraulic pump's brake chamber, creating a negative pressure state within the hydraulic pump. When the negative pressure reaches a certain value, it overcomes the preload force of the one-way valve and draws it open, allowing the brake fluid in the reservoir to be replenished into the hydraulic pump through the replenishment channel. This compensates for any possible fluid loss in the system and prepares the hydraulic system for the next braking operation.

[0039] However, to ensure the sealing performance of the braking system, an elastic sealing ring is installed at the mating gap between the auxiliary piston and the brake caliper. During the return movement after releasing the brake pedal, due to the tight radial fit between the sealing ring and the inner wall of the brake caliper, the auxiliary piston experiences frictional resistance generated by the deformation of the sealing ring during its return movement. This resistance creates a certain drag torque, hindering the complete return of the auxiliary piston, causing it to eventually remain in a position further forward than its initial position. When the wheel rotates, the brake pads and brake disc maintain a small contact pressure, generating continuous sliding friction. This friction not only causes unnecessary power loss but also accelerates the material wear of the brake pads and brake disc, significantly shortening their service life. It may also cause the braking system temperature to rise, affecting overall braking performance.

[0040] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0041] Combination Figure 1 and Figure 2 This application provides a one-way valve, comprising:

[0042] The connector 100 has a hydraulic passage 110 inside. One end of the hydraulic passage 110 is used to communicate with the reservoir 600 of the braking system, and the other end of the hydraulic passage 110 is used to communicate with the brake chamber 611 of the hydraulic pump 610 of the braking system.

[0043] The valve stem 200 is slidably disposed within the liquid passage 110. One end of the valve stem 200 is used to abut or disengage from the inner wall of the liquid passage 110 to close or open the liquid passage 110.

[0044] The elastic element 300 is connected to the valve stem 200 and is used to drive the valve stem 200 to abut against the inner wall of the liquid passage 110.

[0045] Adjusting component 400 is connected to connecting component 100 and is used to adjust the contact force between valve stem 200 and the inner wall of liquid passage 110.

[0046] In this application, when the driver releases the brake pedal, the secondary piston 621 inside the brake caliper 620 moves back under the action of the return spring, pushing the brake fluid back into the brake chamber 611 of the hydraulic pump 610. The adjusting member 400 increases the contact force between the valve stem 200 and the inner wall of the hydraulic passage 110. At this time, the valve stem 200 and the inner wall of the hydraulic passage 110 remain in contact, preventing the valve stem 200 from opening the hydraulic passage 110. Brake fluid cannot be replenished from the reservoir 600 into the brake chamber 611 of the hydraulic pump 610. As the main piston 612 of the hydraulic pump 610 moves back, the brake chamber 611... The volume of brake fluid in brake chamber 611 should have increased, but because valve stem 200 closes the fluid passage 110, no external brake fluid is injected into brake chamber 611. This increased space cannot be filled by newly added brake fluid, resulting in a higher negative pressure, i.e., a pressure lower than atmospheric pressure. This negative pressure generates a reverse suction force, causing the auxiliary piston 621 of the auxiliary brake caliper 620 to move back. This causes the auxiliary piston 621 to increase the gap between the brake pads and the brake disc, reducing drag torque and preventing continuous friction between the brake pads and the brake disc, thereby indirectly extending the service life of the brake pads and brake disc.

[0047] Combination Figure 3 and Figure 4In this embodiment, the valve stem 200 includes an abutment plate 210 and a connecting rod 220. The abutment plate 210 is connected to one end of the connecting rod 220. The abutment plate 210 is circular, and the connecting rod 220 has a circular cross-section. The diameter of the circular abutment plate 210 is smaller than the diameter of the connecting rod 220. The abutment plate 210 is used to abut against or disengage from the inner wall of the liquid passage 110 to close or open the liquid passage 110. When the pressure on the reservoir 600 side is greater than the pressure on the hydraulic pump 610 side, the pressure on the reservoir 600 side can resist the elastic force of the elastic element 300 to drive the abutment plate 210 to disengage from the liquid passage 110, thereby opening the liquid passage 110. The brake fluid can flow along the gap between the abutment plate 210 and the liquid passage 110 into the brake chamber 611 of the hydraulic pump 610 to achieve fluid replenishment of the brake chamber 611.

[0048] Combination Figure 3 and Figure 4 The connector 100 includes a valve block 120 and a support seat 130. The liquid passage 110 includes a first connecting part 111 and a second connecting part 112. The first connecting part 111 is disposed on the valve block 120, and the second connecting part 112 is disposed on the support seat 130. The support seat 130 is located inside the first connecting part 111. The second connecting part 112 communicates with the first connecting part 111. One end of the first connecting part 111 is used to communicate with the liquid storage tank 600, and the other end of the first connecting part 111 is used to communicate with the brake chamber 611. The valve stem 200 is slidably connected inside the support seat 130.

[0049] In this embodiment, the valve block 120 has a rectangular cross-section and a groove 121 for accommodating the support seat 130. The support seat 130 has an annular cross-section, with one end being a closed end and the other end being a through end. The closed end has an inlet 131, and multiple outlets 132 are arranged along the circumference of the side wall of the support seat 130. The outlets 132 communicate with the groove 121, and the number of outlets 132 can be adjusted as needed, for example, three or four outlets 132. The second connecting part 112 is formed between the inlet 131 and the multiple outlets 132.

[0050] In this embodiment, the first connecting part 111 includes a first connecting section 1111 and a second connecting section 1112. One end of the first connecting section 1111 is used to communicate with the reservoir 600, and the other end of the first connecting section 1111 is used to communicate with the inlet 131. One end of the second connecting section 1112 is used to communicate with the groove 121, and the other end of the second connecting section 1112 is used to communicate with the brake chamber 611. When it is necessary to replenish the fluid, the brake fluid in the reservoir 600 can enter the brake chamber 611 of the hydraulic pump 610 in sequence along the first connecting section 1111, the inlet 131, the outlet 132, the groove 121, and the second connecting section 1112.

[0051] In this embodiment, an inclined surface 133 is provided on the inner wall of the support base 130. The inclined surface 133 is located between the liquid inlet 131 and the liquid outlet 132. The diameter of the inclined surface 133 gradually increases along the direction of the first connecting section 1111 towards the second connecting section 1112. The abutment plate 210 of the valve stem 200 is used to abut or disengage from the inclined surface 133 to close or open the liquid inlet 131, thereby realizing the closure or opening of the liquid passage 110.

[0052] Combination Figure 3 and Figure 4 A first sealing element 230 is provided on the valve stem 200 along the circumference of the valve stem 200. The first sealing element 230 is used to abut against the inner wall of the second connecting part 112. And / or, a second sealing element 134 is provided on the outer wall of the support seat 130 along the circumference of the support seat 130. The second sealing element 134 is used to abut against the inner wall of the first connecting part 111.

[0053] In this embodiment, a first sealing element 230 is provided on the valve stem 200 along the circumference of the valve stem 200, and the first sealing element 230 is used to abut against the inner wall of the second connecting part 112. A second sealing element 134 is provided on the outer wall of the support seat 130 along the circumference of the support seat 130, and the second sealing element 134 is used to abut against the inner wall of the first connecting part 111.

[0054] In this embodiment, the first sealing member 230 includes a first sealing ring, which is arranged circumferentially along the abutment plate 210 of the valve stem 200. The first sealing ring is used to abut against the inclined surface 133 in the second connecting part 112. The second sealing member 134 includes a second sealing ring, which is embedded in the outer wall of the support base 130 and is positioned opposite to the liquid inlet 131. The second sealing ring is used to abut against the inner wall of the groove 121. The first sealing ring and the second sealing ring can be rubber rings.

[0055] In this application, by employing a first sealing ring, brake fluid leakage caused by the gap between the valve stem 200 and the second connecting portion 112 can be prevented, thereby preventing any impact on the pressure of the brake chamber 611 and the brake caliper 620; by employing a second sealing ring, brake fluid leakage along the gap between the support seat 130 and the groove 121 can be prevented, thereby further preventing any impact on the pressure of the brake chamber 611 and the brake caliper 620.

[0056] Combination Figure 3 and Figure 4 The regulating member 400 includes a valve body 410 and a drive part 420. The valve body 410 is connected to the connector 100, and the valve stem 200 is slidably connected to the valve body 410. The drive part 420 is used to drive the valve stem 200 to approach or move away from the inner wall of the liquid passage 110 to adjust the contact force between the valve stem 200 and the liquid passage 110.

[0057] In this embodiment, a fixing groove 122 is provided circumferentially along the opening of the groove 121 on the valve block 120. The valve body 410 is riveted and sealed in the fixing groove 122, and part of the valve body 410 extends out of the valve block 120. The through end of the support seat 130 is inserted and fixedly connected to the valve body 410 so that the valve body 410 closes the through end of the support seat 130.

[0058] In this embodiment, the valve body 410 has a circular cross-section, and the diameter of the valve body 410 gradually decreases in the direction away from the valve block 120. The connecting rod 220 of the valve stem 200 passes through and is slidably connected to the middle of the valve body 410.

[0059] In this embodiment, the elastic element 300 includes a spring, which is sleeved on the connecting rod 220 of the valve stem 200. One end of the spring is connected to the abutment plate 210 of the valve stem 200, and the other end of the spring is connected to the valve body 410. When the spring is in a compressed state, the abutment plate 210 abuts against the inclined surface 133 by the elastic force of the spring. When the driving part 420 drives the abutment plate 210 to approach the inclined surface 133, the driving part 420 can further drive the abutment plate 210 to abut against the inclined surface 133, thereby adjusting the abutment force between the abutment plate 210 and the inclined surface 133. When the pressure on the side of the liquid storage tank 600 is greater than the pressure on the side of the brake chamber 611, the pressure on the side of the liquid storage tank 600 can resist the elastic force of the spring to drive the abutment plate 210 to disengage from the inclined surface 133, thereby causing the valve stem 200 to open the liquid passage 110 and realize liquid replenishment.

[0060] In this application, by employing a valve body 410 and slidingly connecting the valve stem 200 to the valve body 410, the valve body 410 can guide the movement of the valve stem 200, preventing the valve stem 200 from deviating during movement. This indirectly improves the sealing performance between the abutment plate 210 of the valve stem 200 and the inclined surface 133, preventing brake fluid leakage along the abutment plate 210 and the inclined surface 133. By employing a drive unit 420, when the drive unit 420 drives the valve stem 200 closer to the inclined surface 133, the abutment plate 210 of the valve stem 200 can continuously abut against the inclined surface 133, thereby increasing the abutment force between the abutment plate 210 and the inclined surface 133. When the drive unit 420 drives the valve stem 200 away from the inclined surface 133, the abutment force between the abutment plate 210 and the inclined surface 133 can be reduced, thereby achieving adjustment of the abutment force between the abutment plate 210 and the inclined surface 133.

[0061] Combination Figure 3 and Figure 4 The drive unit 420 includes an abutment part 421 and a magnetization part 422. The abutment part 421 is slidably connected to the valve body 410, and the magnetization part 422 is connected to the connector 100. The magnetization part 422 is used to magnetize one of the valve body 410 and the abutment part 421 after a preset current is applied, so that the valve body 410 and the abutment part 421 are magnetically attracted to each other, so that the abutment part 421 abuts against the valve stem 200, thereby driving the valve stem 200 to approach the inner wall of the liquid passage 110.

[0062] In this embodiment, the magnetization part 422 is connected to the valve block 120. The magnetization part 422 is used to magnetize the contact part 421 after a preset current is applied. The valve body 410 is made of metal.

[0063] In this application, when it is necessary to adjust the contact force between the valve stem 200 and the inclined surface 133, a preset current is passed into the magnetized part 422, causing the contact part 421 of the magnetized part 422 to be magnetized. After magnetization, the contact part 421 becomes magnetic, thereby causing the magnetic contact part 421 and the metal valve body 410 to be magnetically attracted. Since the valve body 410 is fixed to the valve block 120, the valve body 410 can attract the contact part 421 and drive the contact part 421 to slide on the valve body 410, so that the contact part 421 can abut against the valve stem 200. By passing in preset currents of different magnitudes, the contact force between the valve stem 200 and the valve body 133 can be adjusted. The magnetic strength of the abutment part 421 is adjusted. When the magnetic strength of the abutment part 421 is greater, the abutment force between the valve stem 200 and the inclined surface 133 is greater. When the magnetic strength of the abutment part 421 is less, the abutment force between the valve stem 200 and the inclined surface 133 is less. When the abutment part 421 is not in contact with the valve stem 200, if the pressure on the side of the liquid storage tank 600 is greater than the pressure on the side of the brake chamber 611, the pressure on the side of the liquid storage tank 600 can resist the elastic force of the spring to drive the abutment plate 210 to disengage from the inclined surface 133, thereby allowing the valve stem 200 to open the liquid passage 110 normally and realize liquid replenishment.

[0064] Combination Figure 3 and Figure 4 The magnetization part 422 includes an electromagnetic coil, which is arranged circumferentially along the valve body 410. The electromagnetic coil is used to magnetize one of the valve body 410 and the contact part 421 after a preset current is applied.

[0065] In this embodiment, the electromagnetic coil is used to magnetize the contact part 421 after a preset current is applied. The contact part 421 is made of magnetic materials such as silicon steel sheet, pure iron or low carbon steel. These materials have high magnetic permeability and low coercivity, and are easily magnetized and demagnetized by external magnetic fields. The valve body 410 is made of ferromagnetic metal, such as iron, cobalt or nickel.

[0066] In this application, when a preset current passes through the coil, a magnetic field is generated according to the principle of electromagnetic induction. This magnetic field magnetizes the contact portion 421 inside the electromagnetic coil, causing the originally disordered magnetic domains inside the electromagnetic coil to align in a direction along the magnetic field, thus exhibiting magnetism. By using the magnetization of the electromagnetic coil to drive the contact portion 421 to move, non-contact force transmission between the electromagnetic coil and the contact portion 421 can be achieved, reducing mechanical wear between the electromagnetic coil and the contact portion 421. The magnitude of the magnetic force and the action response can be quickly adjusted by adjusting the preset current. The structure is simple, which is conducive to miniaturization and integration. Moreover, the movement process is noiseless and frictionless.

[0067] The one-way valve also includes a magnetic shielding tube 500, which is disposed between the valve body 410 and the magnetizing part 422. The magnetic shielding tube 500 is sleeved on the valve body 410, and the abutment part 421 is slidably connected inside the magnetic shielding tube 500.

[0068] In this embodiment, the magnetic shielding tube 500 is made of a material with good magnetic conductivity, such as low carbon steel. The end of the magnetic shielding tube 500 away from the valve block 120 is closed, so that the magnetic shielding tube 500 can prevent the abutment part 421 from falling out.

[0069] In this application, a magnetic shielding tube 500 is provided between the electromagnetic coil and the valve body 410, which can constrain and guide the magnetic field path, provide a low magnetic resistance path for the magnetic field, concentrate the magnetic lines of force generated by the electromagnetic coil through the contact part 421 that needs to be magnetized, reduce the leakage and diffusion of the magnetic field to the outside, improve the magnetization efficiency and electromagnetic attraction force, reduce the driving energy consumption, and also reduce the electromagnetic interference caused by the strong magnetic field to other electronic components or metal parts in the vicinity. At the same time, it can also play a physical isolation and protection role, preventing the contact part 421 from directly contacting and wearing the coil.

[0070] In this application, by sliding the abutment part 421 inside the magnetic shielding tube 500, the magnetic shielding tube 500 can guide the movement of the abutment part 421, preventing the abutment part 421 from shifting position when sliding, thereby preventing the abutment part 421 from causing the valve stem 200 to shift from the inclined surface 133, and indirectly improving the sealing performance between the valve stem 200 and the inclined surface 133.

[0071] Combination Figure 3 and Figure 4 A plug rod 240 is provided on one of the abutment portion 421 and the valve stem 200, and a plug groove 424 is provided on the other of the abutment portion 421 and the valve stem 200. The plug rod 240 is used to insert into or disengage from the plug groove 424.

[0072] In this embodiment, the plug rod 240 is disposed on the connecting rod 220 of the valve stem 200, the plug groove 424 is disposed on the abutment portion 421, the cross section of the plug rod 240 is circular, and the plug groove 424 is configured to cooperate with the circular plug rod 240.

[0073] In other embodiments, the shapes of the plug rod 240 and the plug slot 424 can be adapted as needed, for example, the cross-section of the plug rod 240 can be set to be rectangular, and the plug slot 424 can be configured to cooperate with the rectangular plug rod 240.

[0074] In this application, by adopting the insertion rod 240 and insertion groove 424, the contact area between the connecting rod 220 of the valve stem 200 and the abutment part 421 is increased, preventing positional deviation between the valve stem 200 and the abutment part 421, so that the abutment plate 210 of the valve stem 200 can better abut against the inclined surface 133, indirectly improving the sealing performance between the abutment plate 210 and the inclined surface 133.

[0075] This application also provides a braking system, including a system body and a one-way valve of any of the above embodiments disposed on the system body.

[0076] The specific structure of the one-way valve has been described in detail in the above embodiments, and will not be repeated here.

[0077] This application also provides a vehicle, including a vehicle body and a braking system of any of the above embodiments disposed on the vehicle body.

[0078] In this embodiment, the vehicle is a passenger car. In other embodiments, the vehicle may also be a sedan, truck, tram, or industrial vehicle, etc.

[0079] The vehicle provided in this application, by setting a braking system, when the vehicle is in non-braking mode, i.e., the brake pedal is not pressed, the force acting on the abutment plate 210 of the valve stem 200 on the reservoir 600 side is: ((SD / 4) 2 ×π)×P T , of which S D P is the diameter of the abutment plate 210 of the valve stem 200. T The pressure of the brake fluid on the reservoir 600 side is PT, which is approximately equal to atmospheric pressure. The force F acting on the valve stem 200 abutment plate 210 on the hydraulic pump 610 side is... S +((S D / 4) 2 ×π)×P T , of which F S As the spring preload, the force on the abutment plate 210 of the valve stem 200 on the hydraulic pump 610 side is only F. S The force F S The valve stem 200 abuts against the inclined surface 133, so that the one-way valve remains closed.

[0080] When the vehicle is in pressure-building mode, i.e., the brake pedal is depressed, the force exerted on the valve stem 200 by the reservoir 600 is ((S) D / 4) 2 ×π)×P T The force F acting on the abutment plate 210 of the valve stem 200 on the side of the hydraulic pump 610 is S +((S) D / 4) 2 ×π)×P P , where P P The pressure P on the hydraulic pump 610 side is the pressure that increases as the main piston 612 of the hydraulic pump 610 builds up pressure. P The fluid pressure P of the brake fluid on the 600 side of the reservoir is greater than the pressure of the brake fluid. T Therefore, the force exerted by the hydraulic pump 610 on the abutment plate 210 of the valve stem 200 is greater than the force exerted by the reservoir 600 on the abutment plate 210 of the valve stem 200, causing the abutment plate 210 of the valve stem 200 to abut against the inclined surface 133. At this time, the check valve remains closed.

[0081] When the vehicle is in refill mode (i.e., the driver releases the brake pedal and the solenoid coil is not energized), the force exerted by the reservoir 600 on the abutment plate 210 of the valve stem 200 is ((S) D / 4) 2 ×π)×P T When the main piston 612 of the hydraulic pump 610 moves back, the resultant force F acting on the abutment plate 210 of the valve stem 200 on the side of the hydraulic pump 610 is... S +((S D / 4) 2 ×π)×P P At this time P P Less than PT When the brake fluid in the brake chamber 611 of the hydraulic pump 610 decreases, P P The force will continue to decrease, causing the force exerted by the hydraulic pump 610 on the valve stem 200 abutment plate 210 to be less than the force exerted by the reservoir 600 on the valve stem 200 abutment plate 210. This causes the abutment plate 210 to resist the spring force and move away from the inclined surface 133. The check valve opens, and the brake fluid flows from the reservoir 600 to the brake chamber 611 of the hydraulic pump 610, thus replenishing the brake chamber 611.

[0082] When the vehicle is in the brake caliper 620's auxiliary piston 621 retraction mode, i.e., when the driver releases the brake pedal and needs to drive the auxiliary piston 621 back to its original position, the driver can actively activate the solenoid coil via a knob and adjust the preset current of the solenoid coil. Alternatively, the controller can automatically activate the solenoid coil each time the driver releases the brake pedal. The force exerted by the reservoir 600 on the valve stem 200's abutment plate 210 is ((S D / 4) 2 ×π)×P T The main piston 612 of the hydraulic pump 610 moves back, and the electromagnetic coil is energized according to a preset current. The magnetic field generated by the electromagnetic coil magnetizes the valve body 410 and the abutment part 421, causing them to attract each other. The mutual attraction generated by the magnetization of the valve body 410 and the abutment part 421 is F. M F M The force exerted by the hydraulic pump 610 on the abutment plate 210 of the valve stem 200 increases the contact force between the abutment plate 210 and the inclined surface 133. At this time, the force exerted by the hydraulic pump 610 on the abutment plate 210 of the valve stem 200 is F. S +F M +((S D / 4) 2 ×π)×P P F can be adjusted by adjusting the preset current. MBy increasing the preset current, the contact force between the valve stem 200 and the inner wall of the hydraulic passage 110 can be increased. At this time, the valve stem 200 and the inner wall of the hydraulic passage 110 remain in contact, preventing the valve stem 200 from opening the hydraulic passage 110. Brake fluid cannot be replenished from the reservoir 600 into the brake chamber 611 of the hydraulic pump 610. As the main piston 612 of the hydraulic pump 610 moves back, the volume of brake fluid in the brake chamber 611 should increase. However, because the valve stem 200 closes the hydraulic passage 110, no external brake fluid is injected into the brake chamber 611. This increased space cannot be filled by newly added brake fluid, thus forming... A higher negative pressure, i.e., a pressure lower than atmospheric pressure, generates a reverse suction force, which establishes the required negative pressure in the brake chamber 611 of the hydraulic pump 610. This assists the secondary piston 621 of the brake caliper 620 to move back, increasing the gap between the brake pads and the brake disc. This reduces drag torque and prevents continuous friction between the brake pads and the brake disc, thereby indirectly extending the service life of the brake pads and the brake disc. At the same time, by adjusting the upper limit of the preset current, the minimum negative pressure value in the brake chamber 611 of the hydraulic pump 610 is limited to a preset range to prevent excessively high negative pressure from causing gas to appear in the brake chamber 611 of the hydraulic pump 610.

[0083] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A one-way valve, characterized in that, include: A connector (100) is provided with a hydraulic passage (110), one end of which is used to communicate with the reservoir (600) of the braking system, and the other end of which is used to communicate with the brake chamber (611) of the hydraulic pump (610) of the braking system. A valve stem (200) is slidably disposed within the liquid passage (110). One end of the valve stem (200) is used to abut or disengage from the inner wall of the liquid passage (110) to close or open the liquid passage (110). An elastic element (300) is connected to the valve stem (200) and is used to drive the valve stem (200) to abut against the inner wall of the liquid passage (110); An adjusting member (400) is connected to the connecting member (100) and is used to adjust the contact force between the valve stem (200) and the inner wall of the liquid passage (110).

2. The one-way valve according to claim 1, characterized in that, The adjusting member (400) includes a valve body (410) and a driving part (420). The valve body (410) is connected to the connecting member (100). The valve stem (200) is slidably connected to the valve body (410). The driving part (420) is used to drive the valve stem (200) to approach or move away from the inner wall of the liquid passage (110) to adjust the contact force between the valve stem (200) and the liquid passage (110).

3. The one-way valve according to claim 2, characterized in that, The drive unit (420) includes an abutment part (421) and a magnetization part (422). The abutment part (421) is slidably connected to the valve body (410), and the magnetization part (422) is connected to the connector (100). The magnetization part (422) is used to magnetize one of the valve body (410) and the abutment part (421) after a preset current is applied, so that the valve body (410) and the abutment part (421) are magnetically attracted to each other, so that the abutment part (421) abuts against the valve stem (200), thereby driving the valve stem (200) to approach the inner wall of the liquid passage (110).

4. The one-way valve according to claim 3, characterized in that, The magnetization part (422) includes an electromagnetic coil arranged circumferentially along the valve body (410). The electromagnetic coil is used to magnetize one of the valve body (410) and the abutment part (421) after the preset current is applied.

5. The one-way valve according to claim 3, characterized in that, It also includes a magnetic shielding tube (500), which is disposed between the valve body (410) and the magnetizing part (422). The magnetic shielding tube (500) is sleeved on the valve body (410), and the abutment part (421) is slidably connected inside the magnetic shielding tube (500).

6. The one-way valve according to claim 3, characterized in that, A plug rod (240) is provided on one of the abutment portion (421) and the valve stem (200), and a plug groove (424) is provided on the other of the abutment portion (421) and the valve stem (200). The plug rod (240) is used to insert into or disengage from the plug groove (424).

7. The one-way valve according to any one of claims 1-6, characterized in that, The connector (100) includes a valve block (120) and a support seat (130). The liquid passage (110) includes a first connecting part (111) and a second connecting part (112). The first connecting part (111) is disposed on the valve block (120), and the second connecting part (112) is disposed on the support seat (130). The support seat (130) is located inside the first connecting part (111). The second connecting part (112) communicates with the first connecting part (111). One end of the first connecting part (111) is used to communicate with the liquid storage tank (600), and the other end of the first connecting part (111) is used to communicate with the brake chamber (611). The valve stem (200) is slidably connected inside the support seat (130).

8. The one-way valve according to claim 7, characterized in that, A first sealing element (230) is provided on the valve stem (200) along the circumference of the valve stem (200), the first sealing element (230) is used to abut against the inner wall of the second connecting part (112), and / or, a second sealing element (134) is provided on the outer wall of the support base (130) along the circumference of the support base (130), the second sealing element (134) is used to abut against the inner wall of the first connecting part (111).

9. A braking system, characterized in that, It includes a system body and a one-way valve as described in any one of claims 1-8, which is disposed on the system body.

10. A vehicle, characterized in that, It includes a vehicle body and a braking system as described in claim 9, which is mounted on the vehicle body.

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