Valve, brake assembly and vehicle

Abstract

The invention relates to the technical field of braking, in particular to a valve, a braking assembly and a vehicle, the valve comprises a valve base body, a valve rod and an elastic element, and the valve base body is provided with a valve rod mounting hole; the valve rod is movably arranged in the valve rod mounting hole; the elastic element is connected with the valve base body and / or the valve rod; the valve rod can move in the valve rod mounting hole in the first direction, and the valve rod abuts against the valve base body through the elastic element. When the valve rod moves in the first direction Z in the valve rod mounting hole, the valve rod and the valve base body abut against each other through the elastic element, the elastic element is soft, the valve rod does not abut against and collide with the valve base body to generate noise when moving, and the valve has good NVH.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of braking, in particular to a valve, a brake assembly and a vehicle. BACKGROUND

[0002] The solenoid valve is an industrial equipment controlled by electromagnetism, and is an automatic basic element for controlling fluid, which can be used to adjust the direction, flow, speed and other parameters of working medium. The solenoid valve is widely used, for example, the solenoid valve is used in a vehicle. However, the on and off sound of the solenoid valve in the prior art is obvious, and the NVH (Noise, Vibration, Harshness) is poor. SUMMARY

[0003] Embodiments of the present application provide a valve, a brake assembly and a vehicle to solve the technical problem of the on and off sound of the solenoid valve in the prior art being obvious and the NVH being poor.

[0004] In a first aspect, embodiments of the present application provide a valve, the valve comprising a valve base, a valve rod and an elastic element, the valve base having a valve rod mounting hole; the valve rod being movably arranged in the valve rod mounting hole; the elastic element being connected with the valve base and / or the valve rod; the valve rod being movable in the valve rod mounting hole along a first direction, and the valve rod and the valve base being abutted by the elastic element.

[0005] Optionally, the valve rod is provided with a valve rod stepped surface, the valve base is provided with a through hole stepped surface, along the first direction, the valve rod stepped surface and the through hole stepped surface are arranged to face each other; the elastic element is located between the valve rod stepped surface and the through hole stepped surface; the valve rod is moved along the first direction, and the valve rod stepped surface and the through hole stepped surface are abutted by the elastic element.

[0006] Optionally, the valve rod stepped surface and the elastic element are an integral structure.

[0007] Optionally, the valve rod is provided with a limiting structure, and the limiting structure is connected with the elastic element.

[0008] Optionally, the limiting structure comprises an elastic element mounting groove, and the elastic element is arranged in the elastic element mounting groove; part of the elastic element is exposed outside the elastic element mounting groove and located between the valve rod stepped surface and the through hole stepped surface.

[0009] Optionally, the groove opening of the elastic element mounting groove is located at the valve rod stepped surface, or is located at the side wall of the valve rod between the valve rod stepped surface and the through hole stepped surface.

[0010] Optionally, a blocking part is arranged at the slot opening of the elastic element mounting slot, and the blocking part covers part of the slot opening.

[0011] Optionally, along the first direction, the valve rod comprises a first segment valve rod and a second segment valve rod connected with each other, and a valve rod step surface is formed between the first segment valve rod and the second segment valve rod; the valve rod mounting hole comprises a first segment through hole and a second segment through hole connected with each other, and a through hole step surface is formed between the first segment through hole and the second segment through hole; the first segment through hole is adapted to the movement of the first segment valve rod, and the second segment through hole is adapted to the movement of the second segment valve rod.

[0012] Optionally, the diameter of the first segment through hole is greater than the diameter of the second segment through hole, and the diameter of the first segment valve rod is greater than the diameter of the second segment valve rod.

[0013] Optionally, the valve is provided with a mounting cavity and a valve seat cavity; along the first direction, the mounting cavity and the valve seat cavity are respectively located on both sides of the valve rod mounting hole; the valve rod is provided with a flow guide channel, a first end of the flow guide channel is in communication with the mounting cavity, and a second end of the flow guide channel is in communication with the valve seat cavity.

[0014] Optionally, the first end of the flow guide channel is located at an end surface of the valve rod away from the valve base; the end surface of the valve rod away from the valve base is further provided with an end surface groove, one end of the end surface groove is in communication with the first end of the flow guide channel, and the other end of the end surface groove extends to the outer periphery of the end surface.

[0015] Optionally, the end surface groove is provided with at least two, and the at least two end surface grooves are arranged around the first end of the flow guide channel.

[0016] Optionally, a gap is formed between the side wall of the valve rod and the hole wall of the valve rod mounting hole, and the second end of the flow guide channel is in communication with the valve seat cavity through the gap.

[0017] Optionally, the side wall of the valve rod is provided with a plurality of guide protrusions, the guide protrusions extend along the first direction, the guide protrusions are at least partially in contact with the hole wall of the valve rod mounting hole, and the gap is formed between adjacent two guide protrusions.

[0018] Optionally, the valve further comprises a magnetic shielding cover, an opening end of the magnetic shielding cover is connected with the valve base, and the magnetic shielding cover and the valve base enclose the mounting cavity.

[0019] Optionally, an end of the valve base away from the mounting cavity is provided with a valve seat cavity, and the valve seat cavity is in communication with the valve rod mounting hole.

[0020] Optionally, an end of the valve base body away from the valve rod mounting hole is provided with a valve seat cavity, the valve further comprises a valve seat, an elastic member and a valve ball, the valve seat is at least partially arranged in the valve seat cavity, and the valve seat divides the valve seat cavity into a first chamber and a second chamber arranged in the first direction; the valve seat is provided with a flow passage hole communicating the first chamber and the second chamber; the elastic member and the valve ball are arranged in the second chamber respectively, the elastic member abuts against the valve ball, and the valve ball abuts against the flow passage hole to block the flow passage hole.

[0021] Optionally, a hole wall of the flow passage hole close to the second chamber is a conical surface, and the valve ball abuts against the conical surface.

[0022] Optionally, the first chamber communicates with the valve rod mounting hole; an end of the valve rod in the first direction is located in the valve seat cavity and abuts against the valve ball by penetrating the flow passage hole; the valve rod is movable in the first direction to push the valve ball to move into the second chamber and open the flow passage hole.

[0023] Optionally, the valve further comprises an elastic member mounting seat connected to an end of the valve seat away from the valve base body; one end of the elastic member abuts against the valve ball, and the other end of the elastic member is fixedly connected to the elastic member mounting seat.

[0024] Optionally, the valve base body is provided with a valve outlet communicating with the first chamber; the elastic member mounting seat is provided with a valve inlet communicating with the second chamber.

[0025] Optionally, the valve further comprises a filter screen connected to an end of the elastic member mounting seat away from the valve seat, and the filter screen covers the valve inlet.

[0026] Optionally, the valve seat is in a cylindrical shell structure, and one end of the valve seat is arranged in the valve seat cavity in the first direction; an outer periphery of the other end of the valve seat is provided with a valve seat flange edge connected to an end surface of the valve base body away from the valve rod mounting hole.

[0027] Optionally, the elastic member mounting seat is in a cylindrical structure, and one end of the elastic member mounting seat is arranged in the second chamber in the first direction; an outer periphery of the other end of the elastic member mounting seat is provided with an elastic member mounting seat flange edge connected to an end surface of the valve seat away from the valve base body.

[0028] Optionally, the elastic member is a compression spring.

[0029] Optionally, the valve further includes a magnetic shield, a driving component, and an excitation coil. The open end of the magnetic shield is connected to the valve base, and the magnetic shield and the valve base form a mounting cavity. The driving component is movably disposed in the mounting cavity and abuts against the end face of the valve stem opposite to the valve base. The excitation coil is sleeved on the outside of the magnetic shield and drives the driving component to move, so that the driving component pushes the valve stem to move in the valve stem mounting hole along the first direction.

[0030] Secondly, embodiments of the present invention also provide a braking assembly, which includes the valve as described above.

[0031] Thirdly, embodiments of the present invention also provide a vehicle, the vehicle including a vehicle body and a valve as described above, the vehicle body being electrically connected to the valve; or, the vehicle including a vehicle body and a braking assembly as described above, the vehicle body being connected to the braking assembly.

[0032] Compared with prior art, the present invention has the following advantages:

[0033] In the valve of this embodiment, when the valve stem moves along the first direction Z in the valve stem mounting hole, the valve stem and the valve base abut against each other through an elastic element. The elastic element is relatively soft, so the valve stem will not abut against the valve base and generate noise when it moves. The valve has good NVH.

[0034] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0036] Figure 1 A structural schematic diagram of a cross-sectional view of a valve provided in an embodiment of the present invention;

[0037] Figure 2 This is a structural schematic diagram of a partial cross-sectional view of a valve provided in an embodiment of the present invention;

[0038] Figure 3 for Figure 2 A structural schematic diagram of enlarged section A;

[0039] Figure 4 for Figure 2 A structural schematic diagram of part B in the enlarged view;

[0040] Figure 5This is a schematic diagram of the structure of the valve stem and elastic element after connection, provided in an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of the cross-sectional view of the valve stem provided in an embodiment of the present invention;

[0042] Figure 7 This is a three-dimensional structural schematic diagram of the valve stem provided in an embodiment of the present invention;

[0043] Figure 8 This is a structural schematic diagram of a first-angle sectional view of the elastic element mounting base provided in an embodiment of the present invention;

[0044] Figure 9 This is a structural schematic diagram of a second-angle sectional view of the elastic element mounting base provided in an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of the valve stem center oil circuit provided in an embodiment of the present invention;

[0046] Figure 11 This is a structural schematic diagram of a partial cross-sectional view of the valve when the valve core is closed, provided in an embodiment of the present invention.

[0047] Figure 12 for Figure 11 A structural schematic diagram of the enlarged view of section C;

[0048] Figure 13 This is a schematic diagram of the internal oil circuit of the valve when the valve core is opened, as provided in an embodiment of the present invention.

[0049] 10 - Excitation coil;

[0050] 11-Magnetic shield; 111-Mounting cavity; 112-Open end;

[0051] 12-Drive components;

[0052] 13-Valve stem; 130-First section of valve stem; 131-Valve stem stepped surface; 132-Elastic element mounting groove; 133-Outwardly expanding guide section; 134-Flow guide channel; 135-Second end; 136-Third section of valve stem; 137-End face groove; 138-Guide protrusion; 139-Second section of valve stem; 140-First end;

[0053] 14-Elastic element;

[0054] 15-Valve base; 151-Valve seat cavity; 152-Valve stem mounting hole; 153-First section through hole; 154-Valve outlet; 155-Second section through hole; 156-Through hole stepped surface; 157-First chamber; 158-Second chamber;

[0055] 16-Valve ball;

[0056] 17-Valve seat; 171-Conical surface; 172-Flow passage; 173-Valve seat flange edge;

[0057] 18-Elastic element mounting base; 181-Filter screen mounting groove; 182-Outer periphery with guide; 183-Elastic element mounting base flange edge; 184-Elastic element fixing hole; 185-Valve inlet;

[0058] 19-Elastic component;

[0059] 20 - Filter screen; 201 - Inner ring of filter screen frame; 202 - Outer ring of filter screen frame. Detailed Implementation

[0060] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0061] Reference Figures 1 to 13 As shown in the figure, this application discloses a valve, which includes a valve base 15, a valve stem 13, and an elastic element 14; wherein, the valve base 15 has a valve stem mounting hole 152; the valve stem 13 is movably disposed in the valve stem mounting hole 152; the elastic element 14 is connected to the valve base 15 and / or the valve stem 13; the valve stem 13 can move in the first direction Z in the valve stem mounting hole 152, and the valve stem 13 and the valve base 15 abut against each other through the elastic element 14.

[0062] The valve stem 13 can change the opening degree or state of the valve by moving along the first direction Z, where the first direction Z is the direction in which the valve stem 13 moves due to the push of the driving element 12 in the valve.

[0063] The elastic element 14 is a more flexible component than the valve stem 13, and the elastic element 14 is, for example, made of rubber or other soft materials. The elastic element 14 is connected to the valve base 15, or the elastic element 14 is connected to the valve stem 13, or the elastic element 14 is connected to both the valve base 15 and the valve stem 13.

[0064] In the valve of this application embodiment, when the valve stem 13 moves along the first direction Z in the valve stem mounting hole 152, the valve stem 13 and the valve base 15 abut against each other through the elastic element 14. The elastic element 14 is relatively soft, so the valve stem 13 will not abut against the valve base 15 and generate noise when it moves. The valve has better NVH.

[0065] In some embodiments, the valve stem 13 is made of plastic or lightweight metal, in which case the valve stem 13 has the advantages of being impact-resistant and having low inertia.

[0066] In some embodiments, the valve base 15 is made of metal and is manufactured by machining, which has the advantages of high precision and easy assembly.

[0067] In some embodiments, the valve stem 13 is provided with a valve stem stepped surface 131, and the valve base 15 is provided with a through hole stepped surface 156. The valve stem stepped surface 131 and the through hole stepped surface 156 are arranged facing each other along a first direction. An elastic element 14 is located between the valve stem stepped surface 131 and the through hole stepped surface 156. When the valve stem 13 moves along the first direction, the valve stem stepped surface 131 and the through hole stepped surface 156 abut against each other through the elastic element 14.

[0068] In the valve of this application embodiment, when the valve stem 13 moves along the first direction Z in the valve stem mounting hole 152, the valve stem step surface 131 and the through hole step surface 156 abut against each other through the elastic element 14. The elastic element 14 is relatively soft, so the valve stem step surface 131 and the through hole step surface 156 facing each other will not abut against each other and generate noise when the valve stem 13 moves, so that the valve has better NVH.

[0069] In some embodiments, the valve stem stepped surface 131 and the elastic element 14 are integral structural components. In this case, the valve stem 13 and the elastic element 14 are manufactured simultaneously, which can reduce assembly steps.

[0070] In some embodiments, the valve stem 13 and the elastic element 14 are integrally injection molded.

[0071] In some embodiments, the valve stem 13 is provided with a limiting structure, which is connected to the elastic element 14. In this embodiment, the limiting structure can limit and fix the elastic element 14, so that the elastic element 14 is securely connected to the valve stem 13.

[0072] In some embodiments, the limiting structure includes an elastic element mounting groove 132, in which an elastic element 14 is provided; a portion of the elastic element 14 is exposed outside the elastic element mounting groove 132, and the portion of the elastic element 14 exposed outside the elastic element mounting groove 132 is located between the valve stem step surface 131 and the through hole step surface 156.

[0073] In this embodiment, the elastic element mounting groove 132 can limit and fix the elastic element 14, ensuring a secure connection between the elastic element 14 and the valve stem 13. A portion of the elastic element 14 is exposed in the elastic element mounting groove 132, and this exposed portion is located between the valve stem step surface 131 and the through-hole step surface 156. When the valve stem 13 moves along the first direction Z, the valve stem step surface 131 and the through-hole step surface 156 abut against each other via the elastic element 14, effectively preventing noise caused by collision between the valve stem step surface 131 and the through-hole step surface 156, thus achieving a noise reduction effect.

[0074] In some embodiments, the opening of the elastic element mounting groove 132 is located on the valve stem step surface 131. In this case, the portion of the elastic element 14 exposed in the elastic element mounting groove 132 protrudes from the valve stem step surface 131. When the valve stem 13 moves along the first direction Z, the elastic element 14 contacts the through hole step surface 156 before the valve stem step surface 131, thereby effectively avoiding noise generated by the collision between the valve stem step surface 131 and the through hole step surface 156, and achieving a noise reduction effect.

[0075] In other embodiments, the opening of the elastic element mounting groove 132 is located on the side wall of the valve stem 13 between the valve stem step surface 131 and the through hole step surface 156. In this case, the portion of the elastic element 14 exposed in the elastic element mounting groove 132 protrudes from the side wall of the valve stem 13. When the valve stem 13 moves along the first direction Z, one end of the elastic element 14 along the first direction Z contacts the valve stem step surface 131, and the other end of the elastic element 14 along the first direction Z contacts the through hole step surface 156, thereby effectively preventing noise generated by the collision between the valve stem step surface 131 and the through hole step surface 156, achieving a noise reduction effect.

[0076] In some embodiments, a blocking portion is provided at the opening of the elastic element mounting groove 132, which blocks part of the groove opening. The blocking portion can prevent the elastic element 14 from being dislodged from the elastic element mounting groove 132, so that the elastic element 14 is securely disposed in the elastic element mounting groove 132.

[0077] In some embodiments, along the first direction Z, the valve stem 13 includes a first valve stem 130 and a second valve stem 139 connected together, with a valve stem step surface 131 formed between the first valve stem 130 and the second valve stem 139; the valve stem mounting hole 152 includes a first through hole 153 and a second through hole 155 connected together, with a through hole step surface 156 formed between the first through hole 153 and the second through hole 155; the first through hole 153 is adapted to move the first valve stem 130, and the second through hole 155 is adapted to move the second valve stem 139.

[0078] In the above structure of this application embodiment, the valve stem step surface 131 and the through hole step surface 156 are along...Figure 1 The valve stem 131 and the through hole 156 are arranged sequentially in the first direction Z. The valve stem 13 can also prevent the valve stem 13 from moving excessively in the first direction Z.

[0079] In some embodiments, the diameter of the first through hole 153 is greater than the diameter of the second through hole 155, and the diameter of the first valve stem 130 is greater than the diameter of the second valve stem 139.

[0080] In the above structure of this application embodiment, the diameter of the first valve stem 130 is adapted to the diameter of the first through hole 153, and the first valve stem 130 can slide in the first through hole 153. The diameter of the second valve stem 139 is adapted to the diameter of the second through hole 155, and the second valve stem 139 can slide in the second through hole 155. Of course, the second valve stem 139 can also slide in the first through hole 153.

[0081] In some embodiments, refer to Figure 3 and Figure 6 As shown, the second valve stem 139 is provided with an outwardly expanding guide portion 133 at the end near the first valve stem 130. The outwardly expanding guide portion 133 extends outward along the radial direction of the valve stem 13. The outwardly expanding guide portion 133 blocks part of the slot opening of the elastic element mounting groove 132 to prevent the elastic element 14 from coming out of the elastic element mounting groove 132.

[0082] In some embodiments, the valve is provided with a mounting cavity 111 and a valve seat cavity 151; along a first direction, the mounting cavity 111 and the valve seat cavity 151 are respectively located on both sides of the valve stem mounting hole 152; the valve stem 13 is provided with a flow guiding channel 134, the first end of the flow guiding channel 134 is connected to the mounting cavity 111, and the second end of the flow guiding channel 134 is connected to the valve seat cavity 151.

[0083] In this embodiment, the flow channel 134 inside the valve stem 13 connects the mounting cavity 111 and the valve seat cavity 151, preventing the valve stem 13 from being affected by the pressure difference between the mounting cavity 111 and the valve seat cavity 151 due to the valve stem 13 and the valve base 15 abutting each other through the elastic element 14, which would cause flow resistance and affect the movement of the valve stem 13.

[0084] In some embodiments, the first end of the flow channel 134 is located on the end face of the valve stem 13 away from the valve base 15; the end face of the valve stem 13 away from the valve base 15 is also provided with an end face groove 137, one end of the end face groove 137 is connected to the first end of the flow channel 134, and the other end of the end face groove 137 extends to the outer periphery of the end face.

[0085] In this embodiment, when the driving member 12 pushes the valve stem 13 to move, the driving member 12 abuts against the end face of the valve stem 13. The end face groove 137 is provided so that when the driving member 12 abuts against the end face of the valve stem 13, the first end of the flow channel 134 can communicate with the mounting cavity 111 through the end face groove 137.

[0086] In some embodiments, at least two end face grooves 137 are provided, and at least two end face grooves 137 are arranged around the first end of the flow guide channel 134. In the above structure of the present application embodiment, the first end of the flow guide channel 134 can communicate with the mounting cavity 111 through at least two end face grooves 137, which can ensure the flow rate of the working medium in the flow guide channel 134 and effectively avoid the generation of pressure difference between the mounting cavity 111 and the valve seat cavity 151, which would cause flow resistance and affect the movement of the drive member 12.

[0087] In some embodiments, there is a gap between the side wall of the valve stem 13 and the wall of the valve stem mounting hole 152, and the second end of the flow channel 134 communicates with the valve seat cavity 151 through the gap.

[0088] In some embodiments, the sidewall of the valve stem 13 is provided with a plurality of guide protrusions 138, the guide protrusions 138 extend along a first direction, the guide protrusions 138 at least partially contact the wall of the valve stem mounting hole 152, and a gap is formed between two adjacent guide protrusions 138.

[0089] In this embodiment, a gap is formed between two adjacent guide protrusions 138, and the side wall of the valve stem 13 located between the two adjacent guide protrusions 138 and the wall of the valve stem mounting hole 152 form a working medium flow channel. The second end of the guide channel 134 communicates with the valve seat cavity 151 through this working medium flow channel. The arrangement of multiple guide protrusions 138 can restrict the position of the valve stem 13 within the valve stem mounting hole 152 and reduce the contact area between the valve stem 13 and the valve stem mounting hole 152, thereby reducing friction.

[0090] In the above structure of the embodiments of this application, the end face groove 137, the flow guide channel 134, and the working medium flow channel form a flowable cavity, which can be used to achieve the connection between the mounting cavity 111 and the valve seat cavity 151 when the valve stem step surface 131 and the through hole step surface 156 abut against each other through the elastic element 14 (i.e., the valve stem 13 moves to the lower stop point along the first direction Z).

[0091] In some embodiments, the valve further includes a magnetic shield 11, the open end 112 of which is connected to the valve base 15, and the magnetic shield 11 and the valve base 15 form an installation cavity 111.

[0092] The magnetic shield 11 is mainly used to reduce electromagnetic interference and prevent it from affecting the valve's operation. The magnetic shield 11 has a columnar structure, with one end closed and the other end open (112) along the first direction Z. In this embodiment, the driving member 12 is disposed within the mounting cavity 111 formed by the magnetic shield 11 and the valve base 15. Moving the driving member 12 along the first direction Z pushes the valve stem 13 to move along the first direction Z.

[0093] In some embodiments, the magnetic shield 11 is a thin-walled structure that separates the internal oil passage of the valve from the outside. The magnetic shield 11 is made of stainless steel material that is non-magnetic and has good ductility.

[0094] In some embodiments, the valve base 15 has a valve seat cavity 151 at the end opposite to the mounting cavity 111, and the valve seat cavity 151 communicates with the valve stem mounting hole 152.

[0095] In some embodiments, the valve base 15 has a valve seat cavity 151 at the end opposite to the valve stem mounting hole 152. The valve also includes a valve seat 17, an elastic element 19, and a valve ball 16. The valve seat 17 is at least partially disposed in the valve seat cavity 151, and the valve seat 17 divides the valve seat cavity 151 into a first chamber 157 and a second chamber 158 disposed along a first direction. The valve seat 17 has a flow passage 172, which connects the first chamber 157 and the second chamber 158. The elastic element 19 and the valve ball 16 are respectively disposed in the second chamber 158. The elastic element 19 abuts against the valve ball 16, and the valve ball 16 abuts against the flow passage 172 to block the flow passage 172.

[0096] In this embodiment of the application, the first chamber 157 and the second chamber 158 are along... Figure 1 The first chamber 157 is positioned in the Z direction, with the first chamber 157 positioned relative to the second chamber 158 and close to the valve stem mounting hole 152. An elastic element 19 and a valve ball 16 are respectively located within the second chamber 158. The elastic element 19 presses the valve ball 16 against the flow-through hole 172 to seal it. The opening and closing of the valve ball 16 and the flow-through hole 172 directly affects the connection between the first chamber 157 and the second chamber 158. In other words, the valve's opening or closing is achieved through a single valve ball 16. Compared to traditional moving-core assemblies, this significantly reduces inertia and power-down noise.

[0097] In some embodiments, the valve ball 16 is made of high-grade bearing steel ball or stainless steel ball, which has high sealing accuracy and long service life.

[0098] In some embodiments, the elastic element 19 is made of metal and uses a coil spring process.

[0099] In some embodiments, the valve seat 17 is made of stainless steel and is formed by die stamping and heat treatment. The valve seat 17 has the advantages of high strength, high precision and good sealing with the valve ball 16.

[0100] In some embodiments, the elastic element 19 is a compression spring. In this case, the elastic element 19 always provides a force to the valve ball 16 such that the valve ball 16 abuts against the flow passage 172, and the valve is a normally closed valve.

[0101] In some embodiments, the wall of the through-hole 172 near the second chamber 158 is a tapered surface 171, and the valve ball 16 abuts against the tapered surface 171 to achieve a better sealing effect; moreover, the tapered surface 171 can also play a guiding role, so that the valve ball 16 accurately abuts against the through-hole 172.

[0102] In some embodiments, the first chamber 157 is in communication with the valve stem mounting hole 152; the end of the valve stem 13 along the first direction is located in the valve seat cavity 151 and passes through the flow hole 172 to abut against the valve ball 16; the valve stem 13 can move along the first direction to push the valve ball 16 into the second chamber 158 to open the flow hole 172.

[0103] In this embodiment, when the valve stem 13 moves along the first direction Z, the valve stem 13 pushes the valve ball 16 into the second chamber 158, opening the flow passage 172. This allows the valve stem 13 to push the valve ball 16 open, thus opening the flow passage 172. This is a push-open design for the valve ball 16, resulting in better linear control performance of the valve ball 16 opening degree.

[0104] In some embodiments, the valve further includes an elastic element mounting seat 18, which is connected to the end of the valve seat 17 away from the valve base 15; one end of the elastic element 19 abuts against the valve ball 16, and the other end of the elastic element 19 is fixedly connected to the elastic element mounting seat 18. In this embodiment, the elastic element mounting seat 18 is provided to fix the elastic element 19, so that the elastic element 19 can abut against the valve ball 16.

[0105] In some embodiments, the elastic element mounting base 18 is made of metal and manufactured by machining, which has the advantages of high precision and easy assembly.

[0106] In some embodiments, the valve base 15 is provided with a valve outlet 154, which communicates with the first chamber 157; the elastic element mounting seat 18 is provided with a valve inlet 185, which communicates with the second chamber 158.

[0107] In this embodiment, the valve inlet 185 is provided on the elastic element mounting seat 18, which has the advantages of simple and convenient processing compared to providing the valve inlet 185 on the valve base 15 or valve seat 17, and can reduce costs.

[0108] In some embodiments, the valve further includes a filter screen 20, which is connected to the end of the elastic element mounting seat 18 opposite to the valve seat 17, and covers the valve inlet 185. The filter screen 20 is used to filter impurities in the working medium, preventing impurities from affecting the valve.

[0109] In some embodiments, the filter screen 20 is an injection molded part, which is made by embedding the mesh fabric in the injection molding process.

[0110] In some embodiments, the filter screen 20 and the elastic element mounting seat 18 are installed using a snap-fit ​​method. The outer ring 202 of the filter screen skeleton 20 slides into the filter screen mounting groove 181 through the guide of the guide inclined outer periphery 182 of the elastic element mounting seat. The outer ring 202 of the filter screen skeleton is snapped into the filter screen mounting groove 181, and the guide inclined outer periphery 182 of the elastic element mounting seat is snapped into the inner ring 201 of the filter screen skeleton. The interference fit and the snap-fit ​​between the outer ring 202 of the filter screen skeleton and the filter screen mounting groove 181 achieve a tight and limited fastening, preventing the filter screen 20 from falling out and causing large impurities in the working medium to clog the valve.

[0111] In some embodiments, the valve seat 17 has a cylindrical shell structure. Along the first direction Z, one end of the valve seat 17 is located in the valve seat cavity 151. The outer periphery of the other end of the valve seat 17 is provided with a valve seat flange edge 173. The valve seat flange edge 173 is connected to the end face of the valve base 15 away from the valve stem mounting hole 152, which has the advantages of simple and convenient connection.

[0112] In some embodiments, the elastic element mounting seat 18 has a cylindrical structure. Along the first direction Z, one end of the elastic element mounting seat 18 is located in the second chamber 158. The outer periphery of the other end of the elastic element mounting seat 18 is provided with an elastic element mounting seat flange 183. The elastic element mounting seat flange 183 is connected to the end face of the valve seat 17 away from the valve base 15, which has the advantages of simple and convenient connection.

[0113] In some embodiments, the elastic element mounting base 18 further includes an elastic element fixing hole 184. Along the first direction Z, the elastic element fixing hole 184 and the valve inlet 185 are sequentially arranged and connected. The elastic element fixing hole 184 is connected to the elastic element 19.

[0114] In some embodiments, the valve further includes a magnetic shield 11, a drive member 12, and an excitation coil 10. The open end 112 of the magnetic shield 11 is connected to the valve base 15, and the magnetic shield 11 and the valve base 15 form a mounting cavity 111. The drive member 12 is movably disposed within the mounting cavity 111 and abuts against the end face of the valve stem 13 away from the valve base 15. The excitation coil 10 is sleeved on the outside of the magnetic shield 11, and the excitation coil 10 drives the drive member 12 to move, so that the drive member 12 pushes the valve stem 13 to move in a first direction within the valve stem mounting hole 152. In the above structure of this application embodiment, the valve is a solenoid valve.

[0115] In some embodiments, the driving component 12 is a moving iron core, which is made of a soft magnetic metal material with good magnetization characteristics and is formed by machining or cold heading.

[0116] In some embodiments, the valve structure and connection method are as follows, see reference. Figures 1 to 13 As shown:

[0117] The excitation coil 10 is installed on the outside of the magnetic shield 11. The magnetic shield 11 is equipped with a moving iron core, which can move up and down inside the magnetic shield 11 when the excitation coil 10 is energized. The open end of the magnetic shield 11 is also press-fitted to the valve base 15 and sealed by laser welding.

[0118] The valve base 15 contains a valve stem 13, a valve seat 17, a valve ball 16, an elastic element 19, and an elastic element mounting seat 18. One end of the valve seat 17 is located within the valve seat cavity 151 of the valve base 15 and is interference-fitted with the valve base 15. The valve seat flange 173 at the other end of the valve seat 17 is fitted against the end face of the valve base 15 away from the valve stem mounting hole 152 to achieve a limiting position, thereby forming a tight connection between the valve seat 17 and the valve base 15. One end of the elastic element mounting seat 18 is located within the cavity enclosed by the valve seat 17 and is interference-fitted with the valve seat 17. The elastic element mounting flange 183 of the elastic element mounting seat 18 is fitted against the end face of the valve seat 17 away from the flow hole 172 to achieve a limiting position, thereby forming a tight connection between the valve seat 17 and the elastic element mounting seat 18. The end of the elastic element mounting seat 18 away from the valve base 15 is connected to the filter screen 20.

[0119] The valve stem 13 is a multi-segment cylindrical structure with different diameters. Along the first direction Z, the segments are a first valve stem 130, a second valve stem 139, and a third valve stem 136 connected sequentially. The first valve stem 130 has a first end 140 of a flow channel 134 and an end face groove 137 on its end face opposite to the second valve stem 139. The valve stem step surface 131 formed between the first valve stem 130 and the second valve stem 139 is connected to the elastic element 14. The side wall of the second valve stem 139 has a slender guide protrusion 138 extending along the first direction Z, and the side wall of the second valve stem 139 has a second end 135 of the flow channel 134. The third valve stem 136 is the cylinder with the smallest diameter among the valve stems 13. The end face of the third valve stem 136 facing away from the second valve stem 139 contacts the valve ball 16, pushing the valve ball 16 away from the conical surface 171 of the flow hole 172, thus connecting the first chamber 157 and the second chamber 158 inside the valve. The valve stem 13 is slidably disposed in the valve stem mounting hole 152 of the valve base 15, and the end of the valve stem 13 facing away from the moving iron core passes through the flow hole 172 of the valve seat 17 and abuts against the valve ball 16. One end of the elastic element 19 abuts against the valve ball 16, and the other end of the elastic element 19 is fixedly connected to the elastic element mounting seat 18, with the elastic element abutting against the valve ball 16.

[0120] In some embodiments, the valve operates as follows, taking the example of valve inlet 185 being connected to the high-pressure oil circuit of the wheel cylinder, valve outlet 154 being connected to an oil reservoir, and the working medium being liquid oil:

[0121] When the braking system is in normal braking state, the excitation coil 10 is not energized, and the elastic element 19 will push the valve ball 16 to overcome the gravity of the moving iron core and the valve stem 13, keeping the valve ball 16 in contact with the conical surface 171 of the flow hole 172 on the valve seat 17, so that the valve is in the closed state and the oil flow is cut off.

[0122] When ABS is activated during braking, excessively high pressure in the wheel cylinder causes wheel lock-up. In this situation, valve control is needed to ensure the orderly release of high-pressure oil from the wheel cylinder into the reservoir. At this time, the excitation coil 10 is energized, and the moving iron core, after being magnetized, moves towards the valve base 15. This movement pushes the valve stem 13. The downward pressure on the valve stem 13 from the moving iron core exceeds the upward support force of the elastic element 19, causing the valve stem 13 to move downward within the valve stem mounting hole 152. The downward movement of the valve stem 13 pushes the valve ball 16 downward, opening the flow passage 172. The valve stem 13 continues downward until the valve stem step surface 131 of the valve stem 13 and the through-hole step surface 156 of the valve base 15 are tightly fitted together by the elastic element 14, fully opening the flow passage 172. By controlling the duty cycle of the excitation coil 10, proportional control of the opening degree of the flow passage 172 can be achieved, enabling controllable pressure relief in the wheel cylinder.

[0123] Specifically, the valve stem 13 is provided with a flow guide channel 134. When the valve stem 13 moves to the lower stop point under the action of the moving iron core, the elastic element 14 seals the gap between the valve stem 13 and the valve base 15. The valve stem 13 and the valve base 15 cannot form a connecting oil passage between the mounting cavity 111 and the valve seat cavity 151. The connecting oil passage between the mounting cavity 111 and the valve seat cavity 151 is achieved through the flow guide channel 134, which avoids the phenomenon that the moving iron core and valve stem 13 are blocked from moving downward due to the lack of connection between the mounting cavity 111 and the valve seat cavity 151.

[0124] In this embodiment of the valve, when the valve stem 13 slides along the first direction Z, the valve stem 13 and the valve base 15 abut against each other through the elastic element 14. No noise is generated between the valve stem 13 and the valve base 15 due to the impact, effectively reducing the valve's power-on noise. Using a single valve ball 16 as the core achieves a seal, reducing the inertia when the valve ball 16 impacts the conical surface 171, significantly reducing power-off noise and extending the lifespan of the valve ball 16. The second chamber 158 is connected to high pressure, and the first chamber 157 is connected to low pressure. The valve is a valve stem 13-push-open type moving valve ball 16, which provides more stable hydraulic force to the valve ball 16, making it easier to achieve linear control of the valve ball 16 opening degree under the duty cycle signal.

[0125] Moreover, the valve in this embodiment adopts the same valve body shape structure as the normally open valve, which can unify the installation interface size of normally open valves and normally closed valves, and also unify the excitation coil. From the system level, it can achieve interface unification and maximum sharing of components, thereby achieving process simplification and cost reduction.

[0126] This application discloses a braking assembly that includes the valve described above.

[0127] The valve in the braking assembly is a normally closed valve. When the valve stem 13 slides along the first direction Z, the valve stem 13 and the valve base 15 abut against each other through the elastic element 14. The valve stem 13 and the valve base 15 will not generate noise due to the impact of the abutment, which can effectively reduce the valve's electrical noise and thus reduce the noise of the braking assembly.

[0128] This application discloses a vehicle, which includes a vehicle body and a valve as described above, with the vehicle body electrically connected to the valve; or, the vehicle includes a vehicle body and a braking assembly as described above, with the vehicle body connected to the braking assembly.

[0129] When the valve slides along the first direction Z, the valve stem 13 and the valve base 15 abut against each other through the elastic element 14. No noise is generated between the valve stem 13 and the valve base 15 due to the impact of the abutment, resulting in better NVH, thereby improving the NVH of the vehicle and increasing user satisfaction.

[0130] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0131] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0132] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A valve, characterized by: The valve base (15) has a valve rod mounting hole (152); The valve rod (13) is movably arranged in the valve rod mounting hole (152); The elastic element (14) is connected with the valve base (15) and / or the valve rod (13); The valve rod (13) is movable in the valve rod mounting hole (152) in the first direction, and the valve rod (13) and the valve base (15) are abutted by the elastic element (14). The valve rod (13) is provided with a valve rod step surface (131), and the valve base (15) is provided with a through hole step surface (156); along the first direction, the valve rod step surface (131) and the through hole step surface (156) are arranged in a facing manner; 2. The valve of claim 1, wherein The elastic element (14) is located between the valve rod step surface (131) and the through hole step surface (156); The valve rod (13) moves in the first direction, and the valve rod step surface (131) and the through hole step surface (156) are abutted by the elastic element (14). The valve rod step surface (131) and the elastic element (14) are an integral structure.

3. The valve of claim 2, wherein The valve rod (13) is provided with a limiting structure, and the limiting structure is connected with the elastic element (14).

4. The valve of claim 2, wherein The limiting structure includes an elastic element mounting groove (132), and the elastic element (14) is arranged in the elastic element mounting groove (132); 5. The valve of claim 4, wherein Part of the elastic element (14) is exposed to the elastic element mounting groove (132) and located between the valve rod step surface (131) and the through hole step surface (156). The groove opening of the elastic element mounting groove (132) is located on the valve rod step surface (131), or on the side wall of the valve rod (13) between the valve rod step surface (131) and the through hole step surface (156).

6. The valve of claim 5, wherein A blocking portion is arranged at the groove opening of the elastic element mounting groove (132), and the blocking portion blocks part of the groove opening.

7. The valve of claim 5, wherein Along the first direction, 8. The valve of claim 2, wherein The valve rod (13) includes a first section valve rod (130) and a second section valve rod (139) connected with each other, and the valve rod step surface (131) is formed between the first section valve rod (130) and the second section valve rod (139); The valve rod mounting hole (152) includes a first section through hole (153) and a second section through hole (155) connected with each other, and the through hole step surface (156) is formed between the first section through hole (153) and the second section through hole (155); the first section through hole (153) is adapted to the movement of the first section valve rod (130), and the second section through hole (155) is adapted to the movement of the second section valve rod (139). The diameter of the first section through hole (153) is greater than the diameter of the second section through hole (155), and the diameter of the first section valve rod (130) is greater than the diameter of the second section valve rod (139).

9. The valve of claim 8, wherein The valve is provided with a mounting cavity (111) and a valve seat cavity (151); along the first direction, the mounting cavity (111) and the valve seat cavity (151) are respectively located on both sides of the valve rod mounting hole (152); 10. Valve according to any one of claims 1 to 9, characterized in that ​ The valve stem (13) is provided with a flow guide channel (134), a first end of the flow guide channel (134) is in communication with the mounting cavity (111), and a second end of the flow guide channel (134) is in communication with the valve seat cavity (151).

11. The valve of claim 10, wherein The first end of the flow guide channel (134) is located at an end surface of the valve stem (13) away from the valve base body (15). The end surface of the valve stem (13) away from the valve base body (15) is further provided with an end surface groove (137), one end of the end surface groove (137) is in communication with the first end of the flow guide channel (134), and the other end of the end surface groove (137) extends to the outer periphery of the end surface.

12. The valve of claim 11, wherein, The end surface groove (137) is provided with at least two end surface grooves (137) arranged around the first end of the flow guide channel (134).

13. The valve of claim 10, wherein There is a gap between the side wall of the valve stem (13) and the hole wall of the valve stem mounting hole (152), and the second end of the flow guide channel (134) is in communication with the valve seat cavity (151) through the gap.

14. The valve of claim 13, wherein, The side wall of the valve stem (13) is provided with a plurality of guide protrusions (138), the guide protrusions (138) extend in the first direction, the guide protrusions (138) at least partially contact the hole wall of the valve stem mounting hole (152), and the gap is formed between adjacent two guide protrusions (138).

15. The valve of claim 10, wherein, The valve further comprises a magnetic shield cover (11), an open end (112) of the magnetic shield cover (11) is connected with the valve base body (15), and the magnetic shield cover (11) and the valve base body (15) enclose the mounting cavity (111).

16. The valve of claim 10, wherein The end of the valve base body (15) away from the mounting cavity (111) is provided with a valve seat cavity (151), and the valve seat cavity (151) is in communication with the valve stem mounting hole (152).

17. The valve of claim 1, wherein The end of the valve base body (15) away from the valve stem mounting hole (152) is provided with a valve seat cavity (151), and the valve further comprises, A valve seat (17) is at least partially arranged in the valve seat cavity (151), the valve seat (17) divides the valve seat cavity (151) into a first chamber (157) and a second chamber (158) arranged in the first direction, the valve seat (17) is provided with a flow-through hole (172), and the flow-through hole (172) communicates the first chamber (157) and the second chamber (158); An elastic member (19) and a valve ball (16) are respectively arranged in the second chamber (158), the elastic member (19) abuts against the valve ball (16), and the valve ball (16) abuts at the flow-through hole (172) to block the flow-through hole (172).

18. The valve of claim 17, wherein, The hole wall of the flow-through hole (172) close to the second chamber (158) is a conical surface (171), and the valve ball (16) abuts against the conical surface (171).

19. The valve of claim 17, wherein The first chamber (157) is in communication with the valve stem mounting hole (152); The end of the valve stem (13) in the first direction is located in the valve seat cavity (151) and abuts against the valve ball (16) through the flow-through hole (172); The valve stem (13) is movable in the first direction to push the valve ball (16) to move into the second chamber (158) to open the flow-through hole (172).

20. The valve of claim 17, wherein The valve further comprises an elastic member mounting seat (18) connected to the end of the valve seat (17) away from the valve base (15); One end of the elastic member (19) abuts against the valve ball (16), and the other end of the elastic member (19) is fixedly connected to the elastic member mounting seat (18).

21. The valve of claim 20, wherein, The valve base (15) is provided with a valve outlet (154) in communication with the first chamber (157); The elastic member mounting seat (18) is provided with a valve inlet (185) in communication with the second chamber (158).

22. The valve of claim 21, wherein The valve further comprises a filter screen (20) connected to the end of the elastic member mounting seat (18) away from the valve seat (17), and the filter screen (20) covers the valve inlet (185).

23. The valve of claim 17, wherein The valve seat (17) is in a cylindrical shell structure along the first direction, One end of the valve seat (17) is arranged in the valve seat cavity (151); The outer periphery of the other end of the valve seat (17) is provided with a valve seat flange edge (173) connected to the end face of the valve base (15) away from the valve stem mounting hole (152).

24. The valve of claim 20, wherein The elastic member mounting seat (18) is in a cylindrical structure along the first direction, One end of the elastic member mounting seat (18) is arranged in the second chamber (158); The outer periphery of the other end of the elastic member mounting seat (18) is provided with an elastic member mounting seat flange edge (183) connected to the end face of the valve seat (17) away from the valve base (15).

25. The valve of claim 17, wherein The elastic member (19) is a compression spring.

26. The valve of claim 1, wherein The valve further comprises, A magnetic shield (11) having an open end (112) connected to the valve base (15), and the magnetic shield (11) and the valve base (15) enclose an installation cavity (111); A driving member (12) movably arranged in the installation cavity (111) and abutting against the end face of the valve stem (13) away from the valve base (15); An excitation coil (10) sleeved on the outside of the magnetic shield (11), the excitation coil (10) drives the driving member (12) to move, so that the driving member (12) pushes the valve stem (13) to move in the valve stem mounting hole (152) along the first direction.

27. A brake assembly characterized by, The valve comprises the valve according to any one of claims 1-26.

28. A vehicle characterized by The vehicle comprises a vehicle body and the valve according to any one of claims 1-26, and the vehicle body is electrically connected with the valve; or, The vehicle comprises a vehicle body and the brake assembly according to claim 27, and the vehicle body is connected with the brake assembly.

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