Valve, braking assembly, and vehicle

Abstract

A valve (100), comprising a valve base body (15), a valve stem (13), and an elastic element (14). The valve base body (15) is provided with a valve stem mounting hole (152), the valve stem (13) is movably arranged in the valve stem mounting hole (152), and the elastic element (14) is connected to at least one of the valve base body (15) or the valve stem (13). The valve stem (13) can move along a first direction within the valve stem mounting hole (152), and the valve stem (13) and the valve base body (15) abut against each other by means of the elastic element (14). The valve (100) has a low noise level. Also provided are a braking assembly (600) comprising the valve (100), and a vehicle (1000).

Description

Valves, brake assemblies, and vehicles

[0001] This application claims priority to Chinese patent application No. 202411201348.7, filed on August 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of braking technology, and more particularly to a valve, a braking assembly, and a vehicle. Background Technology

[0003] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation systems used to control fluids. They can be used to adjust the direction, flow rate, speed, and other parameters of the working medium. Solenoid valves have a wide range of applications; for example, they are used in vehicles. Summary of the Invention

[0004] This disclosure provides a valve, a braking assembly, and a vehicle to solve the technical problems of solenoid valves in related technologies, which have obvious noise when energized and de-energized, resulting in poor noise, vibration, and acoustic roughness (NVH) performance.

[0005] In a first aspect, a valve is provided, comprising a valve base, a valve stem, and a resilient element, the valve base having a valve stem mounting hole. The valve stem is movably disposed within the valve stem mounting hole. The resilient element is connected to at least one of the valve base or the valve stem. The valve stem is movable within the valve stem mounting hole in a first direction, and the valve stem and the valve base abut against each other via the resilient element.

[0006] In some embodiments, the valve stem has a valve stem stepped surface, and the valve base has a through-hole stepped surface. Along the first direction, the valve stem stepped surface and the through-hole stepped surface are disposed opposite to each other. The elastic element is located between the valve stem stepped surface and the through-hole stepped surface. When the valve stem moves along the first direction, the valve stem stepped surface and the through-hole stepped surface abut against each other via the elastic element.

[0007] In some embodiments, the valve stem stepped surface and the elastic element are an integral structural component.

[0008] In some embodiments, the valve stem is provided with a limiting structure, which is connected to the elastic element.

[0009] In some embodiments, the limiting structure includes an elastic element mounting groove, in which the elastic element is disposed. A portion of the elastic element is exposed outside the elastic element mounting groove, and this portion is located between the valve stem step surface and the through hole step surface.

[0010] In some embodiments, the slot opening of the elastic element mounting groove is located on the valve stem step surface, or the slot opening of the elastic element mounting groove (132) is located on the side wall of the valve stem between the valve stem step surface and the through hole step surface.

[0011] In some embodiments, a blocking portion is provided at the opening of the elastic element mounting groove, and the blocking portion partially blocks the groove opening.

[0012] In some embodiments, along the first direction, the valve stem includes a first valve stem segment and a second valve stem segment connected together, with a valve stem stepped surface formed between the first valve stem segment and the second valve stem segment. The valve stem mounting hole includes a first through hole and a second through hole that are connected, with a through hole stepped surface formed between the first through hole and the second through hole. The first through hole is adapted to move the first valve stem segment, and the second through hole is adapted to move the second valve stem segment.

[0013] In some embodiments, the diameter of the first through hole is greater than the diameter of the second through hole, and the diameter of the first valve stem is greater than the diameter of the second valve stem.

[0014] In some embodiments, the valve has a mounting cavity and a valve seat cavity. Along the first direction, the mounting cavity and the valve seat cavity are located on opposite sides of the valve stem mounting hole. The valve stem has a flow guiding channel, the first end of which communicates with the mounting cavity, and the second end of which communicates with the valve seat cavity.

[0015] In some embodiments, the first end of the flow channel is located on the end face of the valve stem opposite to the valve base. The end face of the valve stem opposite to the valve base is also provided with at least one end face groove, the first end of the at least one end face groove is connected to the first end of the flow channel, and the second end of the at least one end face groove extends to the outer periphery of the end face.

[0016] In some embodiments, the at least one end face groove includes a plurality of end face grooves disposed around a first end of the flow channel.

[0017] In some embodiments, there is a gap between the sidewall of the valve stem and the wall of the valve stem mounting hole, and the second end of the flow guide channel communicates with the valve seat cavity through the gap.

[0018] In some embodiments, the sidewall of the valve stem is provided with a plurality of guide protrusions, the plurality of guide protrusions extend along the first direction, at least a portion of any one of the plurality of guide protrusions contacts the wall of the valve stem mounting hole, and a gap is formed between two adjacent guide protrusions.

[0019] In some embodiments, the valve further includes a magnetic shield, the open end of which is connected to the valve base, and the magnetic shield and the valve base together form the mounting cavity.

[0020] In some embodiments, the valve base has a valve seat cavity at the end opposite to the mounting cavity, and the valve seat cavity communicates with the valve stem mounting hole.

[0021] In some embodiments, the valve body has a valve seat cavity at the end opposite to the valve stem mounting hole. The valve further includes a valve seat, an elastic element, and a valve ball. The valve seat is at least partially disposed within the valve seat cavity, dividing the valve seat cavity into a first chamber and a second chamber disposed along the first direction. The valve seat has a flow passage connecting the first chamber and the second chamber. The elastic element and the valve ball are respectively disposed within the second chamber. The elastic element abuts against the valve ball, and the valve ball abuts against the flow passage to block the flow passage.

[0022] In some embodiments, the wall of the through-hole near the second chamber is a tapered surface, and the valve ball abuts against the tapered surface.

[0023] In some embodiments, the first chamber communicates with the valve stem mounting hole. The end of the valve stem along the first direction is located within the valve seat cavity and abuts against the valve ball through the flow passage. The valve stem is movable along the first direction to push the valve ball into the second chamber, opening the flow passage.

[0024] In some embodiments, the valve further includes a resilient mounting base connected to the end of the valve seat opposite to the valve base. A first end of the resilient element abuts against the valve ball, and a second end of the resilient element is connected to the resilient mounting base.

[0025] In some embodiments, the valve base has a valve outlet that communicates with the first chamber. The elastic element mounting seat has a valve inlet that communicates with the second chamber.

[0026] In some embodiments, the valve further includes a filter screen connected to the end of the resilient mounting base opposite to the valve seat, the filter screen covering the valve inlet.

[0027] In some embodiments, the valve seat has a cylindrical shell structure, and along the first direction, the first end of the valve seat is disposed within the valve seat cavity. The outer periphery of the second end of the valve seat is provided with a valve seat flange, and the valve seat flange is connected to the end face of the valve body opposite to the valve stem mounting hole.

[0028] In some embodiments, the elastic element mounting seat has a cylindrical structure, and along the first direction, the first end of the elastic element mounting seat is disposed in the second cavity. The outer periphery of the second end of the elastic element mounting seat is provided with an elastic element mounting seat flange, and the elastic element mounting seat flange is connected to the end face of the valve seat opposite to the valve base.

[0029] In some embodiments, the elastic element is a compression spring.

[0030] In some embodiments, the valve further includes a magnetic shield, a drive element, 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 drive element is movably disposed within 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 the excitation coil drives the drive element to move, thereby causing the drive element to push the valve stem to move along the first direction within the valve stem mounting hole.

[0031] Secondly, a braking assembly is provided, which includes the valve described above.

[0032] Thirdly, a vehicle is provided, the vehicle including a body and the aforementioned valve, the body being electrically connected to the valve; or, the vehicle including a body and the aforementioned braking assembly, the body being connected to the braking assembly.

[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 or collide with the valve base when it moves, thus generating noise. The valve has good NVH performance.

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

[0035] To more clearly illustrate the technical solutions in the embodiments of this disclosure or related technologies, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0036] Figure 1 is a cross-sectional view of a valve according to some embodiments;

[0037] Figure 2 is a cross-sectional view of a partial structure of a valve according to some embodiments;

[0038] Figure 3 is a magnified view of the local structure at circle A in Figure 2;

[0039] Figure 4 is a magnified view of the local structure at circle B in Figure 2;

[0040] Figure 5 is a cross-sectional view of the valve stem and elastic element after connection according to some embodiments;

[0041] Figure 6 is a cross-sectional view of the valve stem according to some embodiments;

[0042] Figure 7 is a perspective view of a valve stem according to some embodiments;

[0043] Figure 8 is a cross-sectional view of the elastic element mounting base according to some embodiments;

[0044] Figure 9 is a cross-sectional view of the elastic element mounting base according to some embodiments;

[0045] Figure 10 is a structural diagram of the valve stem center oil passage according to some embodiments;

[0046] Figure 11 is a cross-sectional view of a portion of the valve structure when the valve core is closed according to some embodiments;

[0047] Figure 12 is a magnified view of the local structure at circle C in Figure 11;

[0048] Figure 13 is a structural diagram of the oil passage inside the valve when the valve core is opened according to some embodiments;

[0049] Figure 14 is a block diagram of a braking assembly according to some embodiments;

[0050] Figure 15 is a block diagram of a vehicle according to some embodiments; and

[0051] Figure 16 is another block diagram of a vehicle according to some embodiments.

[0052] Reference numerals: 1000-Vehicle; 500-Vehicle body; 600-Brake assembly; 100-Valve; 10-Excitation coil; 11-Magnetic shield; 111-Mounting cavity; 112-Open end; 12-Drive component; 13-Valve stem; 130-First section valve stem; 131-Valve stem stepped surface; 132-Elastic element mounting groove; 133-Outward expansion guide; 134-Flow guide channel; 135-Second end; 136-Third section valve stem; 137-End face groove; 138-Guide protrusion; 139-Second section valve stem; 140-First end; 14-Elastic element; 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- 157 - Through-hole stepped surface; 158 - First chamber; 16 - Second chamber; 17 - Valve ball; 17 - Valve seat; 171 - Conical surface; 172 - Flow passage hole; 173 - Valve seat flange edge; 18 - Elastic element mounting seat; 181 - Filter screen mounting groove; 182 - Outer periphery with guide; 183 - Elastic element mounting seat flange edge; 184 - Elastic element fixing hole; 185 - Valve inlet; 19 - Elastic element; 20 - Filter screen; 201 - Inner ring of filter screen skeleton; 202 - Outer ring of filter screen skeleton. Detailed Implementation

[0053] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0054] The solenoid valves in the related technologies make very noticeable noise when they are powered on and off, and have poor noise, vibration, and harshness (NVH) performance.

[0055] Therefore, some embodiments of this disclosure provide a valve 100. Referring to FIG1, the valve 100 includes a valve base 15, a valve stem 13, and an elastic element 14. The valve base 15 has a valve stem mounting hole 152. The valve stem 13 is movably disposed within the valve stem mounting hole 152. The elastic element 14 is connected to at least one of the valve base 15 or the valve stem 13. The valve stem 13 is movable within the valve stem mounting hole 152 in a first direction Z, and the valve stem 13 and the valve base 15 abut against each other through the elastic element 14.

[0056] The valve stem 13 can change the opening degree or state of the valve 100 by moving along the first direction Z. The first direction Z is the direction in which the valve stem 13 moves due to the push of the driving member 12 in the valve 100.

[0057] It should be noted that 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.

[0058] In some embodiments of the valve 100 disclosed herein, when the valve stem 13 moves along the first direction Z within the valve stem mounting hole 152, the valve stem 13 and the valve base 15 abut against each other through an elastic element 14. The elastic element 14 is relatively soft, so that the valve stem 13 will not abut against or impact the valve base 15 when it moves, thus generating noise, and the valve 100 has better NVH performance.

[0059] 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.

[0060] In some embodiments, the valve base 15 is made of metal material, for example, the valve base 15 is manufactured by machining. In this case, the valve base 15 has the advantages of high precision and easy assembly.

[0061] In some embodiments, as shown in Figures 2 and 3, the valve stem 13 has a valve stem stepped surface 131, and the valve base 15 has a through-hole stepped surface 156. Along a first direction, the valve stem stepped surface 131 and the through-hole stepped surface 156 are arranged opposite to each other. 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.

[0062] In some embodiments of the valve 100 disclosed herein, when the valve stem 13 moves along the first direction Z within 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. Since the elastic element 14 is relatively soft, the valve stem step surface 131 and the through hole step surface 156, which are arranged opposite each other, will not abut against each other and generate noise when the valve stem 13 moves. This makes the valve 100 have better NVH performance.

[0063] 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.

[0064] In some embodiments, the valve stem 13 and the elastic element 14 are integrally injection molded.

[0065] In some embodiments, the valve stem 13 is provided with a limiting structure, which is connected to the elastic element 14. In some embodiments of this disclosure, 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.

[0066] In some embodiments, the limiting structure includes an elastic element mounting groove 132, in which an elastic element 14 is disposed. 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.

[0067] In some embodiments of this disclosure, the elastic element mounting groove 132 can limit and fix the elastic element 14, so that the elastic element 14 is reliably connected to 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. Thus, 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 through the elastic element 14, 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.

[0068] 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 preventing 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.

[0069] 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, the first end of the elastic element 14 along the first direction Z contacts the valve stem step surface 131, and the second end of the elastic element 14 along the first direction Z contacts the through hole step surface 156. This effectively avoids noise generated by the collision between the valve stem step surface 131 and the through hole step surface 156, achieving a noise reduction effect.

[0070] 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.

[0071] In some embodiments, as shown in Figures 1, 3, and 5, along the first direction Z, the valve stem 13 includes a first valve stem segment 130 and a second valve stem segment 139 connected together, with a valve stem stepped surface 131 formed between the first valve stem segment 130 and the second valve stem segment 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 stepped 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 segment 130, and the second through hole 155 is adapted to move the second valve stem segment 139.

[0072] In the above-described structure of some embodiments of this disclosure, the valve stem step surface 131 and the through hole step surface 156 are arranged sequentially along the first direction Z in FIG1. ​​The valve stem step surface 131 and the through hole step surface 156 can also prevent the valve stem 13 from moving excessively along the first direction Z.

[0073] 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.

[0074] In the above-described structure of some embodiments of this disclosure, 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.

[0075] In some embodiments, as shown in Figures 3 and 6, 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 and partially blocks 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.

[0076] In some embodiments, as shown in Figures 1, 2, and 6, the valve 100 has 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 located on opposite sides of the valve stem mounting hole 152. The valve stem 13 has a flow guiding channel 134, with a first end communicating with the mounting cavity 111 and a second end communicating with the valve seat cavity 151.

[0077] In some embodiments of this disclosure, 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.

[0078] 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 at least one end face groove 137 (as shown in FIG7), the first end of the at least one end face groove 137 is connected to the first end of the flow channel 134, and the second end of the at least one end face groove 137 extends to the outer periphery of the end face.

[0079] In some embodiments of this disclosure, when the drive member 12 pushes the valve stem 13 to move, the drive member 12 abuts against the end face of the valve stem 13. The end face groove 137 is provided so that when the drive 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.

[0080] In some embodiments, at least one end face groove 137 includes at least two end face grooves 137, which are disposed around the first end of the flow channel 134. In the above structure of some embodiments of this disclosure, the first end of the flow channel 134 can communicate with the mounting cavity 111 through at least two end face grooves 137. This ensures the flow rate of the working medium within the flow channel 134 and effectively prevents flow resistance caused by a pressure difference between the mounting cavity 111 and the valve seat cavity 151, thus affecting the movement of the drive member 12.

[0081] 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.

[0082] In some embodiments, as shown in Figures 1 and 7, the sidewall of the valve stem 13 is provided with a plurality of guide protrusions 138, which extend along a first direction. At least a portion of any one of the guide protrusions 138 contacts the wall of the valve stem mounting hole 152, and a gap is formed between two adjacent guide protrusions 138.

[0083] In some embodiments of this disclosure, a gap is formed between two adjacent guide protrusions 138, and a working medium flow channel is formed between 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. 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.

[0084] In the above-described structure of some embodiments of this disclosure, the end face groove 137, the flow guide channel 134, and the working medium flow channel form a cavity for the working medium to flow through, so that 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), the connection between the mounting cavity 111 and the valve seat cavity 151 can still be achieved.

[0085] In some embodiments, as shown in FIG1, the valve 100 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.

[0086] The magnetic shield 11 is primarily configured to reduce electromagnetic interference and prevent it from affecting the operation of the valve 100. For example, the magnetic shield 11 has a columnar structure, with its first end closed and its second end open (112) along the first direction Z. In some embodiments of this disclosure, the drive member 12 is disposed within the mounting cavity 111 formed by the magnetic shield 11 and the valve base 15, and the drive member 12 moves along the first direction Z to push the valve stem 13 to move along the first direction Z.

[0087] In some embodiments, the magnetic shield 11 is a thin-walled structure that separates the internal oil passage of the valve 100 from the outside. The magnetic shield 11 can be made of stainless steel, which is non-magnetic and has good ductility.

[0088] 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.

[0089] In some embodiments, as shown in Figures 1, 2, and 12, the valve base 15 has a valve seat cavity 151 at its end opposite to the valve stem mounting hole 152. The valve 100 also includes a valve seat 17, an elastic element 19, and a valve ball 16. The valve seat 17 is at least partially disposed within the valve seat cavity 151, dividing 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 that connects the first chamber 157 and the second chamber 158. The elastic element 19 and the valve ball 16 are respectively disposed within 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.

[0090] In some embodiments of this disclosure, the first chamber 157 and the second chamber 158 are arranged along the first direction Z in FIG1, with the first chamber 157 being closer to the valve stem mounting hole 152 than the second chamber 158. An elastic element 19 and a valve ball 16 are respectively disposed within the second chamber 158. The elastic element 19 abuts the valve ball 16 against the flow passage 172 to block the flow passage 172. The opening and closing of the valve ball 16 and the flow passage 172 directly affects the communication between the first chamber 157 and the second chamber 158. That is, the closing or opening of the valve 100 is achieved through a single valve ball 16. Compared with traditional moving core assemblies, this significantly reduces inertia and also significantly reduces power-down noise.

[0091] 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.

[0092] In some embodiments, the elastic element 19 is made of metal and uses a coil spring process.

[0093] In some embodiments, the valve seat 17 is made of stainless steel and is formed by die stamping and heat treatment. In this case, the valve seat 17 has the advantages of high strength, high precision and good sealing with the valve ball 16.

[0094] 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 100 is a normally closed valve.

[0095] In some embodiments, as shown in Figures 11 and 12, 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 also serves as a guide, ensuring that the valve ball 16 accurately abuts against the through-hole 172.

[0096] In some embodiments, as shown in Figures 1 and 12, the first chamber 157 communicates with the valve stem mounting hole 152. The end of the valve stem 13 along a first direction is located within the valve seat cavity 151 and abuts against the valve ball 16 through the flow-through hole 172. The valve stem 13 can be moved along the first direction to push the valve ball 16 into the second chamber 158, thereby opening the flow-through hole 172.

[0097] In some embodiments of this disclosure, 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. Thus, by pushing the valve ball 16 open with the valve stem 13, the flow passage 172 is opened. The valve ball 16 is a push-open design, resulting in better linear control performance of the valve ball 16's opening degree.

[0098] In some embodiments, as shown in FIG1, the valve 100 further includes an elastic element mounting seat 18, which is connected to the end of the valve seat 17 opposite to the valve base 15. A first end of the elastic element 19 abuts against the valve ball 16, and a second end of the elastic element 19 is fixedly connected to the elastic element mounting seat 18. In some embodiments of this disclosure, the elastic element mounting seat 18 is configured to fix the elastic element 19 such that the elastic element 19 can abut against the valve ball 16.

[0099] In some embodiments, the elastic element mounting base 18 is made of metal and manufactured by machining. In this case, the elastic element mounting base 18 has the advantages of high precision and ease of assembly.

[0100] In some embodiments, as shown in Figures 1, 8, 9, 12, and 13, 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.

[0101] In some embodiments of this disclosure, a valve inlet 185 is provided on the elastic element mounting base 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.

[0102] In some embodiments, as shown in FIG1, valve 100 further includes a filter screen 20 connected to the end of resilient mounting base 18 opposite to valve seat 17, and the filter screen 20 covers valve inlet 185. The filter screen 20 is configured to filter impurities in the working medium to prevent impurities from affecting valve 100.

[0103] 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.

[0104] In some embodiments, the filter screen 20 and the elastic element mounting base 18 are installed using a snap-fit ​​method. As shown in Figures 2 and 4, 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 base 18. 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 base 18 is snapped into the inner ring 201 of the filter screen skeleton. In this way, the interference fit and 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, which can prevent the filter screen 20 from falling out and causing large impurities in the working medium to clog the valve 100.

[0105] In some embodiments, as shown in Figures 1 and 2, the valve seat 17 has a cylindrical shell structure, and its first end is located in the valve seat cavity 151 along the first direction Z. The outer periphery of the second end of the valve seat 17 is provided with a valve seat flange edge 173, which is connected to the end face of the valve base 15 away from the valve stem mounting hole 152, thus having the advantage of simple and convenient connection.

[0106] In some embodiments, as shown in Figures 1 and 4, the elastic element mounting seat 18 has a cylindrical structure, with its first end located within the second chamber 158 along the first direction Z. The outer periphery of the second end of the elastic element mounting seat 18 is provided with an elastic element mounting seat flange 183, which connects to the end face of the valve seat 17 opposite to the valve base 15, offering the advantage of simple and convenient connection.

[0107] In some embodiments, as shown in FIG2, 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.

[0108] In some embodiments, the valve 100 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 opposite to 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 some embodiments of this disclosure, the valve 100 is a solenoid valve.

[0109] 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. The moving iron core can be formed by machining or cold heading.

[0110] In some embodiments, the structure and connection method of valve 100 are as follows.

[0111] 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.

[0112] 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. The first 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 second 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.

[0113] The valve stem 13 comprises multiple cylindrical structures with different diameters. Along the first direction Z, the valve stem 13 includes a first valve stem 130, a second valve stem 139, and a third valve stem 136 connected in sequence (refer to Figures 5 and 7). The first valve stem 130 has a first end 140 of a flow guide 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 guide channel 134.

[0114] The third valve stem 136 is the smallest diameter cylinder 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. The third valve stem 136 pushes 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 100. The valve stem 13 is slidably disposed in the valve stem mounting hole 152 of the valve base 15. 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. The first end of the elastic element 19 abuts against the valve ball 16, and the second end of the elastic element 19 is fixedly connected to the elastic element mounting seat 18. The elastic element abuts against the valve ball 16.

[0115] In some embodiments, the working principle of valve 100 is described below, taking the example of valve inlet 185 being connected to the high-pressure oil circuit of wheel cylinder, valve outlet 154 being connected to oil reservoir, and working medium being oil.

[0116] 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 passage hole 172 on the valve seat 17, so that the valve 100 is in the closed state and the oil flow is cut off.

[0117] When the Anti-lock Braking System (ABS) is engaged during braking, excessively high pressure in the wheel cylinders can cause wheel lock-up. In this situation, valve 100 needs to be controlled to ensure the orderly release of high-pressure oil from the wheel cylinders 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. The valve stem 13 moves downward within the valve stem mounting hole 152, pushing the valve ball 16 downward to open the flow passage 172. The valve stem 13 continues to move 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. At this point, the flow passage 172 is fully opened. When the duty cycle of the excitation coil 10 is controlled, the opening of the through-hole 172 can be controlled according to the required ratio, thereby achieving controllable pressure relief of the wheel cylinder.

[0118] In some embodiments, as shown in Figures 1, 6, and 10, a flow guide channel 134 is provided on the valve stem 13. 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, preventing the valve stem 13 and the valve base 15 from forming a connecting oil passage between the mounting cavity 111 and the valve seat cavity 151. In this way, the connecting oil passage between the mounting cavity 111 and the valve seat cavity 151 is achieved through the flow guide channel 134, avoiding the phenomenon that the downward movement of the moving iron core and the valve stem 13 is blocked due to the lack of communication between the mounting cavity 111 and the valve seat cavity 151.

[0119] In some embodiments of the valve 100 disclosed herein, 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 power-on noise of the valve 100. Using a single valve ball 16 as the ball core achieves sealing, 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 100 pushes open the valve ball 16 via the valve stem 13, making the hydraulic force on the valve ball 16 more stable and facilitating linear control of the valve ball 16 opening degree under the duty cycle signal.

[0120] Furthermore, in some embodiments of this disclosure, the valve 100 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. This achieves interface unification and maximum sharing of components at the system level, thereby simplifying the process and reducing costs.

[0121] As shown in Figure 14, some embodiments of this disclosure also provide a braking assembly 600, which includes the valve 100 described above.

[0122] The valve 100 in the brake assembly 600 is a normally closed valve. When the valve stem 13 of the valve 100 slides along the first direction Z, the valve stem 13 and the valve base 15 in the valve 100 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 electrical noise of the valve 100, and thus reduce the noise of the brake assembly 600.

[0123] As shown in Figures 15 and 16, some embodiments of this disclosure also provide a vehicle 1000, which includes a vehicle body 500 and the aforementioned valve 100, with the vehicle body 500 electrically connected to the valve 100. Alternatively, the vehicle 1000 includes a vehicle body 500 and the aforementioned brake assembly 600, with the vehicle body 500 connected to the brake assembly 600.

[0124] When the valve 100 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. This results in better NVH performance, thereby improving the NVH performance of the vehicle and increasing user satisfaction.

[0125] 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.

[0126] 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.

[0127] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure are included within the scope of protection of this disclosure.

Claims

1. A valve, comprising: The valve base (15) has a valve stem mounting hole (152); The valve stem (13) is movably disposed within the valve stem mounting hole (152); and The elastic element (14) is connected to at least one of the valve base (15) or the valve stem (13); The valve stem (13) can move in a first direction within 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).

2. The valve according to claim 1, wherein, 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). Along the first direction, the valve stem stepped surface (131) and the through hole stepped surface (156) are arranged opposite to each other. The elastic element (14) is located between the valve stem stepped surface (131) and the through hole stepped surface (156); The valve stem (13) moves along the first direction, and the valve stem step surface (131) and the through hole step surface (156) abut against each other through the elastic element (14).

3. The valve according to claim 2, wherein, The valve stem step surface (131) and the elastic element (14) are an integral structural component.

4. The valve according to claim 2, wherein, The valve stem (13) is provided with a limiting structure, which is connected to the elastic element (14).

5. The valve according to claim 4, wherein, The limiting structure includes an elastic element mounting groove (132), and the elastic element (14) is provided in the elastic element mounting groove (132); A portion of the elastic element (14) is exposed in the elastic element mounting groove (132), and the portion is located between the valve stem step surface (131) and the through hole step surface (156).

6. The valve according to claim 5, wherein, The slot opening of the elastic element mounting groove (132) is located on the valve stem step surface (131), or The slot 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).

7. The valve according to claim 5 or 6, wherein, The elastic element mounting groove (132) has a blocking part at the groove opening, and the blocking part covers part of the groove opening.

8. The valve according to any one of claims 2-7, wherein, Along the first direction, the valve stem (13) includes a first valve stem (130) and a second valve stem (139) connected to each other, and a valve stem step surface (131) is 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) that are connected to each other, and a through hole stepped surface (156) is formed between the first through hole (153) and the second through hole (155); the first through hole (153) is adapted to the movement of the first valve stem (130), and the second through hole (155) is adapted to the movement of the second valve stem (139).

9. The valve according to claim 8, wherein, 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).

10. The valve according to any one of claims 1 to 9, 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 stem mounting hole (152); The valve stem (13) is provided with a flow guide channel (134), the first end of the flow guide channel (134) is connected to the mounting cavity (111), and the second end of the flow guide channel (134) is connected to the valve seat cavity (151).

11. The valve according to claim 10, wherein, 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 valve stem (13) is provided with at least one end face groove (137) on the end face away from the valve base (15). The first end of the at least one end face groove (137) is connected to the first end of the flow channel (134), and the second end of the at least one end face groove (137) extends to the outer periphery of the end face.

12. The valve according to claim 11, wherein, The at least one end face groove (137) includes a plurality of end face grooves (137) disposed around the first end of the flow channel (134).

13. The valve according to any one of claims 10-12, wherein, 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 guide channel (134) communicates with the valve seat cavity (151) through the gap.

14. The valve according to claim 13, wherein, The valve stem (13) has a plurality of guide protrusions (138) on its side wall. The plurality of guide protrusions (138) extend along the first direction. At least a portion of any one of the plurality of guide protrusions (138) contacts the wall of the valve stem mounting hole (152). A gap is formed between two adjacent guide protrusions (138).

15. The valve according to any one of claims 10-14 further includes a magnetic shield (11), the open end (112) of the magnetic shield (11) being connected to the valve base (15), the magnetic shield (11) and the valve base (15) forming the mounting cavity (111).

16. The valve according to any one of claims 10-15, wherein, 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) is connected to the valve stem mounting hole (152).

17. The valve according to any one of claims 1-16, wherein, The valve base (15) has a valve seat cavity (151) at the end opposite to the valve stem mounting hole (152), and the valve further includes: A valve seat (17) is provided, at least a portion of which is disposed within 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) disposed along the first direction. The valve seat (17) is provided with a flow passage (172) that 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 through hole (172) to block the through hole (172).

18. The valve according to claim 17, wherein, 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).

19. The valve according to claim 17 or 18, wherein, The first chamber (157) is connected to 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) and open the flow passage (172).

20. The valve according to any one of claims 17-19 further includes an elastic element mounting seat (18) connected to the end of the valve seat (17) away from the valve base (15); The first end of the elastic element (19) abuts against the valve ball (16), and the second end of the elastic element (19) is connected to the elastic element mounting seat (18).

21. The valve according to claim 20, wherein, The valve base (15) is provided with a valve outlet (154), which is connected to the first chamber (157); The elastic element mounting base (18) is provided with a valve inlet (185), which is connected to the second chamber (158).

22. The valve according to claim 21 further includes a filter screen (20) connected to the end of the elastic element mounting base (18) away from the valve seat (17), the filter screen (20) covering the valve inlet (185).

23. The valve according to any one of claims 17-21, wherein, The valve seat (17) has a cylindrical shell structure. Along the first direction, the first end of the valve seat (17) is located in the valve seat cavity (151). The outer periphery of the second 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).

24. The valve according to claim 20, wherein, The elastic element mounting seat (18) has a cylindrical structure. Along the first direction, the first end of the elastic element mounting seat (18) is located in the second chamber (158). The outer periphery of the second 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).

25. The valve according to any one of claims 17-24, wherein, The elastic element (19) is a compression spring.

26. The valve according to any one of claims 1-25, further comprising: A magnetic shield (11) is provided, the open end (112) of which is connected to the valve base (15), and the magnetic shield (11) and the valve base (15) together form an installation cavity (111). The driving member (12) is movably disposed in the mounting cavity (111), and the driving member (12) abuts against the end face of the valve stem (13) away from the valve base (15); as well as An excitation coil (10) is sleeved on the outside of the magnetic shield (11). 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 the first direction within the valve stem mounting hole (152).

27. A braking assembly comprising a valve according to any one of claims 1-26.

28. A vehicle comprising one of the following: The vehicle body and the valve according to any one of claims 1-26, wherein the vehicle body is electrically connected to the valve; or The vehicle body and the braking assembly according to claim 27, wherein the vehicle body is connected to the braking assembly.

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