Electromagnetic valve, brake assembly and vehicle

Abstract

The utility model provides an electromagnetic valve, a brake assembly and a vehicle. The electromagnetic valve comprises a main valve seat and a one-way valve seat. The main valve seat is provided with a containing groove. The one-way valve seat is arranged in the accommodating groove; the one-way valve seat is provided with a first one-way oil duct, and the main valve seat is provided with a second one-way oil duct communicated with the first one-way oil duct. According to the electromagnetic valve, the brake assembly and the vehicle, machining of the main valve seat of the electromagnetic valve and machining of the one-way valve seat are simpler, the machining precision is higher, and the overall manufacturing cost of the electromagnetic valve can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of vehicle braking technology, and in particular relates to a solenoid valve, a brake assembly and a vehicle. Background Art

[0002] Solenoid valve is an industrial device controlled by electromagnetics. It is a basic component for controlling fluid automation. It is an actuator and is not limited to hydraulic or pneumatic. Solenoid valves can be used with different circuits to achieve the desired control to adjust the direction, flow, speed and other parameters of the medium. Due to the good accuracy and stability of solenoid valve control, they are widely used in the field of automobile production and modification.

[0003] In the prior art, a one-way valve seat is usually formed directly on the main valve seat. Due to the structural influence of the one-way valve seat, the processing of the one-way valve seat directly on the main valve seat is complicated, which leads to low precision in the one-way valve seat directly processed on the main valve seat. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present application provides a solenoid valve, a brake assembly and a vehicle. The processing of the main valve seat and the one-way valve seat of the solenoid valve is simpler and has higher processing accuracy, and the overall manufacturing cost of the solenoid valve can be reduced.

[0005] In one aspect, the present application provides a solenoid valve, comprising:

[0006] A main valve seat is provided with a receiving groove; and

[0007] A one-way valve seat is arranged in the accommodating groove; the one-way valve seat is provided with a first one-way oil passage, and the main valve seat is provided with a second one-way oil passage connected with the first one-way oil passage.

[0008] In a possible implementation, the first one-way oil passage extends axially along the one-way valve seat, the second one-way oil passage extends axially along the main valve seat, and central axes of the first one-way oil passage and the second one-way oil passage are staggered.

[0009] In a possible embodiment, the one-way valve seat includes a one-way valve body and a floating body, and the one-way valve body is accommodated in the accommodating groove; a step surface is formed at the connection point between the first one-way oil passage and the second one-way oil passage, and the floating body is movably arranged between the first one-way oil passage and the step surface, and the floating body is used to block the first one-way oil passage.

[0010] In a possible implementation, the solenoid valve further includes a valve base and a valve core, the valve base is arranged on one side of the one-way valve seat installed on the main valve seat; the valve base has a protrusion at one end close to the main valve seat, and at least part of the protrusion abuts against the one-way valve seat.

[0011] In a possible implementation, the valve base is provided with a hollow cavity, and the valve core is movably arranged in the hollow cavity; the valve base is provided with a through hole, and the through hole connects the hollow cavity and the peripheral side wall of the valve base; the main valve seat is provided with a main oil channel, and the main oil channel is connected with the hollow cavity.

[0012] In a possible implementation manner, at least a portion of the opening of the first one-way oil passage is offset from the protrusion.

[0013] In a possible implementation manner, there are multiple protrusions, and a gap arranged along the radial direction of the valve base is formed between two adjacent protrusions, and the gap communicates with the first one-way oil passage and the peripheral side wall of the valve base.

[0014] In a possible embodiment, the main valve seat includes a first part and a second part that are connected, the first part extends into the hollow cavity and is in active contact with the valve core, and the second part is located outside the hollow cavity; the radial dimension of the first part along the main valve seat is smaller than the radial dimension of the second part along the main valve seat, and the opening of the accommodating groove is arranged on the end surface of the second part close to one end of the first part.

[0015] In a possible implementation manner, a receiving hole is provided at one end of the second part away from the first part, the receiving hole is communicated with the main oil passage, and the receiving hole is also communicated with the second one-way oil passage;

[0016] The solenoid valve also includes a filter screen and a limit ring. The filter screen is received in the receiving hole and is used to filter the fluid passing through the main oil channel and the second one-way oil channel. The limit ring is arranged in the receiving hole and is fixedly connected to the inner side wall of the receiving hole to fix the filter screen in the receiving hole.

[0017] In a possible implementation manner, the solenoid valve further includes a connecting block, which is sealingly sleeved on a circumferential side of one end of the valve base body close to the main valve seat, and the connecting block is also sealingly sleeved on a circumferential side of the second part;

[0018] The connecting block is provided with a first channel and a second channel, the first channel is communicated with the receiving hole, the second channel is communicated with the main oil channel, and the second channel is also communicated with the first one-way oil channel.

[0019] In a possible embodiment, the first part includes a guide section and a connecting section, and the connecting section is connected between the guide section and the second part; the guide section is accommodated in the hollow cavity, the peripheral side wall of the guide section is spaced apart from the inner side wall of the hollow cavity, and the peripheral side wall of the connecting section at one end close to the guide section is interference fit with the inner side wall of the hollow cavity.

[0020] In a possible implementation manner, an annular groove is provided on the peripheral side wall of the first portion, and the annular groove is provided on the peripheral side wall at the connection between the guide section and the connection section.

[0021] In a possible implementation manner, the solenoid valve further includes:

[0022] A housing, wherein one end of the valve base body facing away from the main valve seat is accommodated in the housing and fixedly connected to the housing;

[0023] a magnetic isolation tube, which is accommodated in the housing and is sealingly sleeved on an end of the valve base body away from the main valve seat; and

[0024] The coil is contained in the shell and is sleeved outside the magnetic isolation tube.

[0025] In a possible implementation manner, the solenoid valve further includes:

[0026] A moving member is movably arranged at one end of the valve base body away from the main valve seat along the axial direction of the valve base body, and the moving member is accommodated in the magnetic isolation tube, and the moving member is used to move after the coil is energized;

[0027] a connecting rod, movably disposed in the hollow cavity along the axial direction of the valve base body, the connecting rod being connected between the moving member and the valve core; and

[0028] An elastic member is elastically supported between the connecting rod and the main valve seat.

[0029] On the other hand, the present application provides a brake assembly, comprising:

[0030] The solenoid valve mentioned above;

[0031] A pressure building module; and

[0032] The solenoid valve connects the pressure building module and the wheel cylinder.

[0033] In another aspect, the present application provides a vehicle, comprising:

[0034] The brake assembly described above.

[0035] The solenoid valve, brake assembly and vehicle provided by the present application are provided with a one-way valve seat in the receiving groove of the main valve seat, that is, the main valve seat and the one-way valve seat are designed separately and then installed to form a whole, so as to avoid directly processing the one-way valve seat on the main valve seat. Since it is difficult to process the one-way valve seat on the main valve seat, the one-way valve seat is formed by separate processing, so that the processing of the main valve seat and the one-way valve seat is simpler, so that the processing accuracy of the one-way valve seat is higher, and the overall production cost of the solenoid valve can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a cross-sectional view of a solenoid valve provided in one embodiment of the present application;

[0038] Figure 2 This is a structural diagram of a main valve seat provided in one embodiment of the present application;

[0039] Figure 3 is a cross-sectional view of a main valve seat provided in one embodiment of the present application;

[0040] Figure 4 This is a structural diagram of a one-way valve seat provided in one embodiment of the present application;

[0041] Figure 5 is a structural diagram of a valve base provided in one embodiment of the present application;

[0042] Figure 6 is a cross-sectional view of a valve base provided in one embodiment of the present application;

[0043] Figure 7 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 1 ;

[0044] Figure 8 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 2 ;

[0045] Fig. 9 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 3 ;

[0046] Fig.10 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 4 . DETAILED DESCRIPTION

[0047] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0048] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "top", "side", "bottom", "top wall", "side wall", "bottom wall", "inner side wall", "circumferential side wall", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, if not otherwise specified, include direct connection (connection) and indirect connection (connection). It should be understood that in the description of the present application, "axial" and "radial" are both relative to the axial direction and radial direction of the solenoid valve in the drawings of the present application.

[0049] The present application provides a vehicle, which includes a brake assembly, which includes a solenoid valve, a pressure building module and a wheel cylinder. The solenoid valve is used to accurately control the flow direction, flow rate, speed and other parameters of the fluid between the pressure building module and the wheel cylinder. The solenoid valve of the brake assembly plays a very important role in the automobile engine control system. It realizes functions such as fuel injection, cylinder control, brake system control and transmission control by accurately controlling the flow of gas and liquid, thereby ensuring the efficient operation of the engine and the safety performance of the vehicle.

[0050] Exemplarily, the solenoid valve of a vehicle has the following functions.

[0051] 1. Fuel injection control

[0052] The vehicle's solenoid valve plays a key role in the fuel injection system. When the engine needs fuel supply, the computer control system will control the opening and closing of the fuel nozzle through the solenoid valve so that the fuel is sprayed into the cylinder at a certain time and pressure. By accurately controlling the injection amount and injection timing of the fuel, the engine can achieve the best combustion effect, improve fuel utilization and reduce exhaust emissions.

[0053] 2. Cylinder Control

[0054] The vehicle's solenoid valve is also used to control the intake and exhaust process of the cylinder. When the engine is working, the solenoid valve will control the opening and closing of the cylinder intake and exhaust valves according to the engine speed and load requirements. By accurately controlling the opening and closing time and degree of the valve, the gas in the cylinder can be filled and discharged, ensuring the normal flow and circulation of the gas in the combustion chamber, and improving the engine's power performance and combustion efficiency.

[0055] 3. Braking system control

[0056] The vehicle's solenoid valve also plays an important role in the braking system. During the braking process, the solenoid valve will control the flow of brake fluid according to the driver's braking instructions, so that the brakes can be applied to the wheels according to the predetermined force and time, achieving vehicle deceleration and parking. Through the precise control of the solenoid valve, the braking system can have better responsiveness and stability, improving the braking effect and safety performance of the vehicle.

[0057] 4. Transmission Control

[0058] The vehicle's solenoid valve is also used to control the transmission. In an automatic transmission, the solenoid valve controls the opening and closing of the clutch and shift valve according to the engine speed, vehicle speed and driver's needs to achieve automatic shifting and smooth shifting. Through accurate control of the solenoid valve, the transmission can have better shifting performance and fuel economy under different working conditions.

[0059] 5. Other Applications

[0060] In addition to the above aspects, the vehicle's solenoid valve also plays an important role in many other systems. For example, it can be used to control the engine's idle control valve to adjust the engine's idle speed. It can also be used to control the engine's turbocharger to provide greater intake pressure. In addition, the solenoid valve can also be used to control the vehicle's air conditioning system, cooling system, and exhaust system.

[0061] It can be understood that in some other embodiments, the solenoid valve can be applied to other equipment, such as engineering machinery, etc., and the present application does not limit this.

[0062] In conjunction with the accompanying drawings, the structure of the solenoid valve provided by the present application is described in detail by taking the solenoid valve applied to the braking system control of a vehicle as an example:

[0063] See also Figure 1 , Figure 1 It is a cross-sectional view of a solenoid valve provided in one embodiment of the present application.

[0064] The solenoid valve 100 provided in this embodiment includes a valve base 10, a valve core 20, a main valve seat 30 and a one-way valve seat 40. The valve base 10 has a hollow cavity 11 extending through the axial direction. The valve core 20 is movably arranged in the hollow cavity 11. A portion of the main valve seat 30 extends into the hollow cavity 11 and movably contacts the valve core 20, and another portion of the main valve seat 30 extends out of the hollow cavity 11. The portion of the main valve seat 30 located outside the hollow cavity 11 is provided with a receiving groove 31, and the one-way valve seat 40 is arranged in the receiving groove 31.

[0065] Specifically, the main valve seat 30 has a main oil passage 32 that is arranged to penetrate along the axial direction, and the main oil passage 32 is communicated with the hollow cavity 11. The valve base 10 has a through hole 12 that extends in the radial direction, and the through hole 12 communicates with the hollow cavity 11 and the outside of the valve base 10, so as to communicate the main oil passage 32 with the outside of the valve base 10. The one-way valve seat 40 has a first one-way oil passage 41 that is arranged to penetrate along the axial direction, and the first one-way oil passage 41 is communicated with the outside of the valve base 10. The main valve seat 30 has a second one-way oil passage 33 that is communicated with the first one-way oil passage 41, so that the second one-way oil passage 33 of the main valve seat 30 is communicated with the outside of the valve base 10.

[0066] The solenoid valve 100 provided in the present application is provided in the receiving groove 31 of the main valve seat 30 by the one-way valve seat 40, that is, the main valve seat 30 and the one-way valve seat 40 are separately designed and then installed to form a whole, so as to avoid directly processing and forming the one-way valve seat 40 on the main valve seat 30. Since it is difficult to process and form the one-way valve seat 40 on the main valve seat 30, the one-way valve seat 40 is formed by processing separately, so that the processing of the main valve seat 30 and the one-way valve seat 40 can be processed separately, and the processing of the main valve seat 30 and the one-way valve seat 40 is simpler, so that the processing accuracy of the one-way valve seat 40 is higher, and the overall manufacturing cost of the solenoid valve 100 can also be reduced. At the same time, since the one-way valve seat 40 and the main valve seat 30 are separately arranged, the processing quality of the one-way valve seat 40 will not affect the processing quality of the main valve seat 30. When the one-way valve seat 40 fails, the one-way valve seat 40 can be removed separately for maintenance, which is conducive to reducing the overall maintenance cost of the solenoid valve 100.

[0067] It can be understood that in the embodiment of the present application, the solenoid valve 100 may only include the main valve seat 30 and the one-way valve seat 40, the main valve seat 30 is provided with a receiving groove 31, the one-way valve seat 40 is arranged in the receiving groove 31, the one-way valve seat 40 is provided with a first one-way oil passage 41, the main valve seat 30 is provided with a second one-way oil passage 33, and the first one-way oil passage 41 and the second one-way oil passage 33 are connected. The one-way valve seat 40 is arranged in the receiving groove 31 of the main valve seat 30, that is, the main valve seat 30 and the one-way valve seat 40 are designed separately and then assembled to form a whole, so as to avoid directly processing the one-way valve seat 40 on the main valve seat 30. Since it is difficult to process the one-way valve seat 40 on the main valve seat 30, the one-way valve seat 40 is formed by separate processing, so that the processing of the main valve seat 30 and the one-way valve seat 40 is simpler, so that the processing accuracy of the one-way valve seat 40 is higher, and the overall manufacturing cost of the solenoid valve 100 can also be reduced.

[0068] Please refer again Figure 1 In a specific embodiment, the solenoid valve 100 further includes a housing 50 , a magnetic isolation tube 51 and a coil 52 .

[0069] The housing 50 is sleeved on the peripheral side wall of the valve base 10 away from the main valve seat 30 and is fixedly connected to the valve base 10 , that is, the end of the valve base 10 away from the main valve seat 30 is accommodated in the housing 50 and is fixedly connected to the housing 50 .

[0070] In this embodiment, the housing 50 and the valve base 10 are fixedly connected via a ring structure. In other embodiments, the housing 50 and the valve base 10 can be directly fixedly connected via interference fit, which is not limited in this application.

[0071] The magnetic isolation tube 51 is accommodated in the housing 50. One end of the magnetic isolation tube 51 has an opening and the other end is closed. The end of the magnetic isolation tube 51 with the opening is sealedly sleeved on the peripheral side wall of the valve base 10 at one end away from the main valve seat 30. The end of the magnetic isolation tube 51 away from the valve base 10 extends out of the housing 50, and the end extending out of the housing 50 is closed. The peripheral side wall of the magnetic isolation tube 51 at one end extending out of the housing 50 is fixedly connected to the housing 50.

[0072] In this embodiment, the magnetic isolation tube 51 and the valve base 10 are sealed by welding. In other embodiments, the magnetic isolation tube 51 and the valve base 10 are sealed by interference fit or by a sealing ring, which is not limited in this application.

[0073] The coil 52 is accommodated in the housing 50 and is sleeved outside the magnetic isolation tube 51. The coil 52 is used to generate an electromagnetic field to make the valve core 20 move axially in the valve base 10 so that the valve core 20 contacts the main valve seat 30 or the valve core 20 is disconnected from the main valve seat 30.

[0074] Please refer again Figure 1 In a specific embodiment, the valve core 20 is moved axially in the valve base 10 to open or close the main oil passage 32 of the main valve seat 30. The solenoid valve 100 further includes a moving member 21, a connecting rod 22 and an elastic member 23.

[0075] The moving member 21 is movably disposed along the axial direction of the valve base 10 at one end of the valve base 10 away from the main valve seat 30, and the moving member 21 is accommodated in the magnetic isolation tube 51. In this embodiment, the moving member 21 is a magnetic body, such as a core iron, and the moving member 21 moves axially in the electromagnetic field generated by the coil 52.

[0076] The connecting rod 22 is inserted into the valve base 10 and is movably arranged in the axial direction in the hollow cavity 11 of the valve base 10. The connecting rod 22 is connected between the moving member 21 and the valve core 20. The moving member 21 moves in the axial direction to drive the connecting rod 22 and the valve core 20 to move in the axial direction, so that the valve core 20 can contact or disconnect with the main oil passage 32 of the main valve seat 30, thereby realizing the opening and closing of the main valve seat 30.

[0077] The elastic member 23 is elastically compressed between the connecting rod 22 and the main valve seat 30 . The setting of the elastic member 23 can reduce the impact of the valve core 20 on the main valve seat 30 , thereby reducing damage to the main valve seat 30 , which is beneficial to increasing the service life of the main valve seat 30 .

[0078] Please refer again Figure 1 In a specific embodiment, in order to achieve communication between the main valve seat 30 and the external oil passage of the solenoid valve 100 , and to achieve communication between the one-way valve seat 40 and the external oil passage, the solenoid valve 100 further includes a connecting block 60 .

[0079] The connecting block 60 is sealingly sleeved on one end of the valve base 10 close to the main valve seat 30, that is, the connecting block 60 is sealingly sleeved on the connection between the valve base 10 and the housing 50. The connecting block 60 is also sealingly sleeved on the peripheral side wall of the main valve seat 30 located outside the valve base 10 (that is, on the peripheral side wall of the second part 35 mentioned later). Among them, the connecting block 60 includes a first channel 61 and a second channel 62, the first channel 61 axially penetrates the connecting block 60, and the second channel 62 is arranged radially. The second channel 62 communicates with the through hole 12 and the outside of the sealing block. The first channel 61 is connected to the main oil channel 32 through the through hole 12, that is, a structure in which the first channel 61, the main oil channel 32, the hollow cavity 11, the through hole 12 and the second channel 62 are connected in sequence is formed to connect the main oil channel 32 with the outside of the solenoid valve 100. The first channel 61 is also connected to the second one-way oil passage 33, and the second channel 62 is also connected to the first one-way oil passage 41, that is, a structure is formed in which the first channel 61, the second one-way oil passage 33, the first one-way oil passage 41 and the second channel 62 are connected in sequence, so as to connect the first one-way oil passage 41 and the second one-way oil passage 33 with the outside of the solenoid valve 100. The connecting block 60 is sealedly sleeved on one end of the valve base 10 close to the main valve seat 30, and the connecting block 60 is also sealedly sleeved on the peripheral side wall of the main valve seat 30 outside the valve base 10, so as to separate the first channel 61 and the second channel 62, thereby preventing fluid from flowing between the first channel 61 and the second channel 62.

[0080] In this embodiment, the connection block 60 and the valve base 10 are sealed by interference fit. In other embodiments, the connection block 60 and the valve base 10 may be sealed by a sealing ring, which is not limited in this application.

[0081] In this embodiment, the connection block 60 and the main valve seat 30 are sealed by a sealing ring. In other embodiments, the connection block 60 and the valve base 10 can be sealed by interference fit, which is not limited in this application.

[0082] Furthermore, there is a gap between the inner wall of the connecting block 60 and the peripheral side wall of the valve base 10 at one end facing away from the shell 50, and there is a gap between the inner wall of the connecting block 60 and the end of the main valve seat 30 close to the valve base 10. The above two gaps are connected to form a gap cavity 63, and the gap cavity 63 is used to connect the through hole 12 and the second channel 62. The gap cavity 63 is also used to connect the first one-way oil channel 41 and the second channel 62.

[0083] See also Figures 1 to 4 , Figure 2 is a structural diagram of a main valve seat provided in one embodiment of the present application. Figure 3 is a cross-sectional view of a main valve seat provided in one embodiment of the present application, Figure 4 This is a structural diagram of a one-way valve seat provided in one embodiment of the present application.

[0084] In a specific embodiment, the main valve seat 30 includes a first portion 34 and a second portion 35 connected in the axial direction, the first portion 34 extends into the hollow cavity 11 and is in active contact with the valve core 20, the second portion 35 is located outside the hollow cavity 11, the radial dimension of the first portion 34 along the main valve seat 30 is smaller than the radial dimension of the second portion 35 along the main valve seat 30, and the opening of the receiving groove 31 is arranged on the end surface of the second portion 35 close to the first portion 34, so that the one-way valve seat 40 is arranged in the receiving groove 31 on the end surface of the second portion 35 close to the first portion 34. By making the radial dimension of the second portion 35 larger than the radial dimension of the first portion 34 and the receiving groove 31 being arranged on the end surface of the second portion 35 close to the first portion 34, it is convenient to process the receiving groove 31 and also convenient to install the one-way valve seat 40 in the receiving groove 31.

[0085] Further, the first one-way oil passage 41 extends along the axial direction of the one-way valve seat 40, the second one-way oil passage 33 extends along the axial direction of the main valve seat 30, and the central axis of the first one-way oil passage 41 is staggered with the central axis of the second one-way oil passage 33. The one-way valve seat 40 includes a one-way valve body 42 and a floating body 43, the one-way valve body 42 is accommodated in the receiving groove 31, and the floating body 43 is movably arranged in the first one-way oil passage 41. When the pressure in the second one-way oil passage 33 is greater than the pressure in the first one-way oil passage 41, the floating body 43 is used to block the first one-way oil passage 41, so that the first one-way oil passage 41 and the second one-way oil passage 33 are separated. When the pressure in the first one-way oil passage 41 is greater than the pressure in the second one-way oil passage 33, the floating body 43 is spaced from the inner side wall of the first one-way oil passage 41, so that the first one-way oil passage 41 and the second one-way oil passage 33 are connected. Since the central axis of the first one-way oil passage 41 and the central axis of the second one-way oil passage 33 are arranged in a staggered manner, a step surface is formed at the connection between the first one-way oil passage 41 and the second one-way oil passage 33, and the step surface is used to limit the floating body 43. Therefore, when the floating body 43 moves in the first one-way oil passage 41, the floating body 43 will not fall from the first one-way oil passage 41 to the second one-way oil passage 33.

[0086] In this embodiment, the radial dimension of the first one-way oil passage 41 is larger than the radial dimension of the second one-way oil passage 33. When the floating body 43 is disposed in the first one-way oil passage 41, the radial dimension of the floating body 43 is made smaller than the radial dimension of the first one-way oil passage 41 as much as possible, and the radial dimension of the floating body 43 is also required to be smaller than the radial dimension of the second one-way oil passage 33. Thus, the floating body 43 can be prevented from falling from the first one-way oil passage 41 into the second one-way oil passage 33.

[0087] Further, a receiving hole 351 is provided at one end of the second part 35 away from the first part 34, and the receiving hole 351 is communicated with the main oil passage 32, and the receiving hole 351 is also communicated with the second one-way oil passage 33. At the same time, the solenoid valve 100 also includes a filter 70 and a limit ring 71. The filter 70 is received in the receiving hole 351, and the filter 70 is used to filter the fluid flowing from the first channel 61 to the main oil passage 32 and the second one-way oil passage 33 to reduce the influence of impurities in the fluid on the main valve seat 30. The limit ring 71 is provided in the receiving hole 351, and the limit ring 71 is fixedly connected to the inner side wall of the receiving hole 351 to fix the filter 70 in the receiving hole 351. The limit ring 71 is fixedly connected to the inner side wall of the receiving hole 351 to fix the filter 70 in the receiving hole 351, so as to achieve the fastening installation of the filter 70.

[0088] See also Figures 1 to 6 , Figure 5 is a structural diagram of a valve base provided in one embodiment of the present application, Figure 6 It is a cross-sectional view of a valve base provided in one embodiment of the present application.

[0089] In a specific embodiment, the valve base 10 has a plurality of protrusions 13 at one end close to the second portion 35, and at least some of the protrusions 13 abut against the one-way valve seat 40. At least some of the openings of the first one-way oil passage 41 are staggered with the protrusions 13, and a gap 14 arranged along the radial direction of the valve base 10 is formed between any two adjacent protrusions 13, and the gap 14 is connected to the first one-way oil passage 41. One end of some of the protrusions 13 close to the second portion 35 abuts against the second portion 35, and another part of the protrusions 13 abuts against the one-way valve seat 40, and the gap 14 connects the first one-way oil passage 41 and the second channel 62, so that the first one-way oil passage 41 is connected to the peripheral side wall of the valve base 10 (the outside of the solenoid valve 100) through the gap 14 and the second channel 62. By providing a plurality of protrusions 13 at one end of the valve base 10 close to the second portion 35, and forming a gap 14 arranged along the radial direction of the valve base 10 between any two adjacent protrusions 13, the first one-way oil passage 41 and the second passage 62 are connected. Therefore, the valve base 10 does not need to be provided with a complex structure for connecting the first one-way oil passage 41 and the second passage 62, so that the structure of the valve base 10 is simple, and the processing of the valve base 10 is convenient.

[0090] Further, the first portion 34 includes a guide section 341 and a connecting section 342, and the connecting section 342 is connected between the guide section 341 and the second section. The guide section 341 is accommodated in the hollow cavity 11, and the peripheral side wall of the guide section 341 is spaced from the inner side wall of the hollow cavity 11, and the peripheral side wall of the connecting section 342 near one end of the guide section 341 is interference fit with the inner side wall of the hollow cavity 11. The radial dimension of the guide section 341 along the first portion 34 is smaller than the radial dimension of the connecting section 342 along the first portion 34. Due to the interference fit between the connecting section 342 of the first portion 34 and the inner side wall of the hollow cavity 11 of the valve base 10, through the setting of the guide section 341, the guide section 341 is used to guide the first portion 34 to extend into the hollow cavity 11 of the valve base 10, so that the first portion 34 can be assembled into the valve base 10.

[0091] In this embodiment, the radial dimension of the guide section 341 is 0.1 mm smaller than the radial dimension of the connecting section 342, so that the connecting section 342 can be introduced into the hollow cavity 11 of the valve base 10 through the guide section 341. In some other embodiments, the radial dimension of the guide section 341 can be 0.15 mm or 0.2 mm smaller than the radial dimension of the connecting section 342, and the present application does not limit this as long as the radial dimension of the guide section 341 is smaller than the radial dimension of the connecting section 342.

[0092] Further, the first portion 34 has an annular groove 343, which is arranged on the peripheral side wall of the first portion 34, and the annular groove 343 is arranged on the peripheral side wall of one end of the connecting section 342 connected to the guide section 341. Since the connecting section 342 is interference-fitted with the inner side wall of the hollow cavity 11 of the valve base 10, debris will be generated due to extrusion after the connecting section 342 extends into the hollow cavity 11. Through the arrangement of the annular groove 343, the annular groove 343 can accommodate the debris generated by the connecting section 342 squeezing the inner side wall of the hollow cavity 11, and can prevent the debris from entering the main valve seat 30 and reducing the sealing performance between the valve core 20 and the main valve seat 30, which is conducive to improving the overall sealing performance of the solenoid valve 100.

[0093] In this embodiment, the annular groove 343 is a "V"-shaped groove, and the inclination angle between the two side walls of the annular groove 343 is 140°. In other embodiments, the annular groove 343 may be a "U"-shaped groove or a groove of other shapes, which is not limited in this application. In other embodiments, the inclination angle between the two side walls of the annular groove 343 may be 120° or 150°, etc., which is not limited in this application.

[0094] Further, in order to prevent the impurities in the second channel 62 from entering the main oil passage 32 and the first one-way oil passage 41, a filter 72 is provided in the gap cavity 63, the filter 72 is located in the gap 14 cavity and is sleeved outside the valve base 10, the filter 72 covers the opening of the through hole 12 of the valve base 10 on the peripheral side wall of the valve base 10, and the filter 72 also covers the opening of the gap 14 of the valve base 10 on the protrusion 13. Through the provision of the filter 72, the filter 72 is used to prevent the impurities in the second channel 62 from entering the main oil passage 32 and the first one-way oil passage 41, so as to reduce the influence of the impurities in the fluid on the main valve seat 30 and the one-way valve seat 40.

[0095] The working process of the solenoid valve 100 provided in the present application when applied to the braking system of a vehicle is described in detail below.

[0096] See also Figure 1 and Figures 7 to 10 , Figure 7 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 1 , Figure 8 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 2 , Fig. 9 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 3 , Fig.10 This is the working principle of a solenoid valve provided in one embodiment of the present application. Figure 4 .

[0097] The first channel 61 of the solenoid valve 100 is used to communicate with the master cylinder, and the second channel 62 of the solenoid valve 100 is used to communicate with the wheel cylinder.

[0098] When the vehicle's braking system is in normal braking state, such as Figure 7 As shown, the coil 52 of the solenoid valve 100 is not energized, and the elastic member 23 will overcome the gravity of the moving member 21, the connecting rod 22 and the valve core 20, and maintain a gap between the valve core 20 and the main oil passage 32 of the main valve seat 30, so that the solenoid valve 100 is in an open state to ensure the oil flow. When the master cylinder pressure P1 is greater than the wheel cylinder pressure P2, the one-way valve seat 40, supported by the master cylinder pressure P1, the floating body 43 of the one-way valve seat 40 adheres to the inner wall of the first one-way oil passage 41 and blocks the first one-way oil passage 41, so that the one-way valve seat 40 remains closed, and the oil can only enter the main valve seat 30 valve through the main oil passage 32 of the main valve seat 30, and then pass through the through hole 12 of the valve base 10, the gap cavity 63 and the second channel 62 in sequence before merging into the wheel cylinder.

[0099] When the anti-lock braking system is triggered during braking, the oil in the master cylinder cannot directly enter the wheel cylinder. It is necessary to control the solenoid valve 100 to allow the oil in the master cylinder to enter the wheel cylinder as needed. Figure 8, the coil 52 of the solenoid valve 100 is energized, the moving part 21 is magnetized and moves toward the valve base 10, and at the same time, the pressure of the moving part 21 on the main valve seat 30 is greater than the elastic support force of the elastic part 23, so that the connecting rod 22 drives the valve core 20 to move toward the main valve seat 30 until the valve core 20 blocks the main oil passage 32 of the main valve seat 30, and the main valve seat 30 remains closed. At the same time, because the master cylinder pressure P1 is greater than the wheel cylinder pressure P2, the floating body 43 of the one-way valve seat 40 is supported by the master cylinder pressure P1 and adheres to the inner wall of the first one-way oil passage 41 and blocks the first one-way oil passage 41, so that the one-way valve seat 40 remains closed. At this time, the oil in the master cylinder cannot pass through the main valve seat 30 and the one-way valve seat 40, that is, the first channel 61 and the second channel 62 are blocked, and the solenoid valve 100 remains in a completely sealed state. When the operator controls the duty cycle of the coil 52, the switching action of the solenoid valve 100 can be controlled in an orderly manner, so that the master cylinder oil can enter the wheel cylinder in a controllable manner.

[0100] Regarding the synchronous pressure relief function of the brake system, such as Fig. 9 and Fig.10 As shown, when the master cylinder pressure P1 is smaller than the wheel cylinder pressure P2, no matter the coil 52 is powered on or off, that is, no matter the main valve seat 30 is opened or closed. At this time, the oil can flow from the wheel cylinder through the one-way valve seat 40 and then flow back to the master cylinder. That is, when the oil pressure in the master cylinder decreases, the oil pressure in the wheel cylinder will inevitably decrease accordingly. The synchronous pressure relief function of the wheel cylinder is realized. It avoids the phenomenon that the oil pressure of the master cylinder disappears after the vehicle brakes, but the oil pressure of the wheel cylinder is still under pressure, causing the vehicle to be unable to drive.

[0101] It should be understood that the direction of the arrow shown in the figure is the flow direction of the oil.

[0102] The characteristics of the main components of the solenoid valve 100 provided in this application are introduced in detail below.

[0103] See also Figure 1In the solenoid valve 100 provided in the present application, the valve base 10, the main valve seat 30 and the one-way valve seat 40 are all made of metal materials, and can be processed and produced by machining, so that the valve base 10, the main valve seat 30 and the one-way valve seat 40 have high processing accuracy and are easy to assemble. The main valve seat 30 is made of tool steel and heat-treated, so that the main valve seat 30 has high strength and high precision, thereby achieving good sealing performance between the valve core 20 and the main oil channel 32. The first part 34 and the second part 35 of the main valve seat 30 are both designed to be cylindrical, which improves the overall strength of the main valve seat 30 and avoids the risk of deformation caused by interference fitting between the first part 34 and the valve base 10 and repeated squeezing of the first part 34 of the main valve seat 30 by the valve core 20. The one-way valve seat 40 is integrated on the main valve seat 30 after secondary installation, which can simplify the structure of the solenoid valve 100. The connecting rod 22 is made of a stainless steel ejector pin, the valve core 20 is made of a G5 grade bearing steel ball, and the connecting rod 22 and the valve core 20 are connected by welding. The valve core 20 has high precision and high strength. As a result, the sealing structure formed by the valve core 20 and the main valve seat 30 has high sealing precision and long service life. The moving part 21 is made of a material with soft magnetic properties and easy to cold head. The filter screen 70 and the filter element 72 are injection molded parts, and the filter screen 70 and the main valve seat 30 are matched with a gap 14. Among them, the limit ring 71 is interference fit with the receiving hole 351 at the lower end of the second part 35 of the main valve seat 30, which can effectively prevent the filter screen 70 from escaping from the receiving hole 351 and causing larger particles in the oil to clog the seal of the solenoid valve 100. The filter element 72 and the main valve seat 30 can be directly interference fitted to form a fixed connection. The magnetic shield is designed as a thin-walled structure that separates the internal oil passage of the solenoid valve 100 from the outside. The magnetic shield is made of non-magnetic and ductile stainless steel. The sealing ring is made of rubber material to ensure the sealing effect between the first channel 61 and the second channel 62 of the connecting block 60.

[0104] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A solenoid valve, characterized in that: include: The main valve seat is provided with a receiving groove; as well as A one-way valve seat is arranged in the accommodating groove; the one-way valve seat is provided with a first one-way oil passage, and the main valve seat is provided with a second one-way oil passage connected with the first one-way oil passage.

2. The solenoid valve according to claim 1, characterized in that The first one-way oil passage extends along the axial direction of the one-way valve seat, the second one-way oil passage extends along the axial direction of the main valve seat, and the central axes of the first one-way oil passage and the second one-way oil passage are staggered.

3. The solenoid valve according to claim 1, characterized in that: The one-way valve seat comprises a one-way valve body and a floating body, and the one-way valve body is accommodated in the accommodating groove; A step surface is formed at the connection point between the first one-way oil passage and the second one-way oil passage, and the floating body is movably arranged between the first one-way oil passage and the step surface. The floating body is used to block the first one-way oil passage.

4. The solenoid valve according to claim 1, characterized in that: The solenoid valve further comprises a valve base and a valve core. The valve base is arranged on one side of a one-way valve seat installed on the main valve seat. The valve base has a protrusion at one end close to the main valve seat, and at least part of the protrusion abuts against the one-way valve seat.

5. The solenoid valve according to claim 4, characterized in that: The valve base is provided with a hollow cavity, and the valve core is movably arranged in the hollow cavity; the valve base is provided with a through hole, and the through hole communicates with the hollow cavity and the peripheral side wall of the valve base; the main valve seat is provided with a main oil channel, and the main oil channel is communicated with the hollow cavity.

6. The solenoid valve according to claim 4, characterized in that: At least a portion of the opening of the first one-way oil passage is staggered with the protrusion.

7. The solenoid valve according to claim 4, characterized in that: There are multiple protrusions, and a gap arranged along the radial direction of the valve base is formed between two adjacent protrusions. The gap communicates with the first one-way oil passage and the peripheral side wall of the valve base.

8. The solenoid valve according to claim 5, characterized in that The main valve seat includes a first part and a second part that are connected, the first part extends into the hollow cavity and is in active contact with the valve core, and the second part is located outside the hollow cavity; the radial dimension of the first part along the main valve seat is smaller than the radial dimension of the second part along the main valve seat, and the opening of the accommodating groove is arranged on the end surface of the second part close to one end of the first part.

9. The solenoid valve according to claim 8, characterized in that A receiving hole is provided at one end of the second part away from the first part, the receiving hole is communicated with the main oil passage, and the receiving hole is also communicated with the second one-way oil passage; The solenoid valve also includes a filter screen and a limit ring. The filter screen is received in the receiving hole and is used to filter the fluid passing through the main oil channel and the second one-way oil channel. The limit ring is arranged in the receiving hole and is fixedly connected to the inner side wall of the receiving hole to fix the filter screen in the receiving hole.

10. The solenoid valve according to claim 9, characterized in that The solenoid valve further comprises a connecting block, which is sealingly sleeved on the circumference of one end of the valve base body close to the main valve seat, and the connecting block is also sealingly sleeved on the circumference of the second part; The connecting block is provided with a first channel and a second channel, the first channel is communicated with the receiving hole, the second channel is communicated with the main oil channel, and the second channel is also communicated with the first one-way oil channel.

11. The solenoid valve according to claim 8, characterized in that The first part includes a guide section and a connecting section, wherein the connecting section is connected between the guide section and the second part; the guide section is accommodated in the hollow cavity, the peripheral side wall of the guide section is spaced apart from the inner side wall of the hollow cavity, and the peripheral side wall of the connecting section at one end close to the guide section is interference fit with the inner side wall of the hollow cavity.

12. The solenoid valve according to claim 11, characterized in that An annular groove is arranged on the peripheral side wall of the first part, and the annular groove is arranged on the peripheral side wall at the connection between the guide section and the connection section.

13. The solenoid valve according to claim 5, characterized in that: The solenoid valve further comprises: A housing, wherein one end of the valve base body facing away from the main valve seat is accommodated in the housing and fixedly connected to the housing; a magnetic isolation tube, which is accommodated in the housing and is sealingly sleeved on an end of the valve base body away from the main valve seat; and The coil is contained in the shell and is sleeved outside the magnetic isolation tube.

14. The solenoid valve according to claim 13, characterized in that The solenoid valve further comprises: A moving member is movably arranged at one end of the valve base body away from the main valve seat along the axial direction of the valve base body, and the moving member is accommodated in the magnetic isolation tube, and the moving member is used to move after the coil is energized; a connecting rod, movably disposed in the hollow cavity along the axial direction of the valve base body, the connecting rod being connected between the moving member and the valve core; and An elastic member is elastically supported between the connecting rod and the main valve seat.

15. A brake assembly, characterized in that: include: The solenoid valve according to any one of claims 1 to 14; Pressure building module; as well as The solenoid valve connects the pressure building module and the wheel cylinder.

16. A vehicle, characterized in that: include: The brake assembly of claim 15.

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