Low-noise stiffness valve

Abstract

The low-noise rigidity valve comprises a valve body and a valve seat, the valve body comprises a valve shell, a valve element, a valve rod, stop iron and an electromagnetic driving mechanism, the electromagnetic driving mechanism comprises an electromagnetic coil and a movable iron core capable of moving in the axial direction, an elastic piece is connected between the movable iron core and the stop iron, and a containing cavity is formed in the end face of the end, close to the valve seat, of the stop iron. The valve element is at least partially contained in the containing cavity, and the end, close to the stop iron, of the valve element is connected with a soft cushion block. A buffering piece made of flexible materials is connected to the inner bottom wall of the containing cavity, and the cushion block abuts against the buffering piece in the power-off state of the electromagnetic coil. According to the low-noise rigidity valve, the impact strength between the cushion block and the stop iron can be obviously reduced, and noise is low.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air suspension system control valves, and in particular to a low-noise stiffness valve for an air suspension system. Background Art

[0002] Automotive air suspension is a device that controls the vehicle's suspension height through air pressure. The air suspension control solenoid valve is a crucial component in automotive air suspension systems. Its primary function is to control inflation or deflation, adjusting the air spring stiffness based on varying road conditions. Therefore, this solenoid valve is also known as the stiffness valve.

[0003] The stiffness valve of the automobile air suspension system of the related art has a structure including a valve body, an electromagnetic drive part, a valve core and a valve stem. One end of the valve stem is connected to the moving iron core of the electromagnetic drive part and can move synchronously with the moving iron core. The other end of the valve stem is connected to the valve core. Through the axial movement of the valve stem, the valve core can be driven to approach or move away from the valve port of the valve body, thereby closing or opening the valve port. For example, in the prior Chinese patent application of the applicant of this case with the publication number CN221838802U and the name of the electromagnetic valve, the end face of the stop iron near the valve seat is provided with a receiving cavity coaxial with the center hole of the stop iron, and the valve core is at least partially received in the receiving cavity; and a pad is connected to the end face of the valve core away from the valve seat, and the pad is against the bottom wall of the receiving cavity when the valve core is in the open state. The pad is an elastic pad. When the valve core is driven to open, the pad can reduce the impact force between the valve core and the stop iron, thereby reducing noise.

[0004] The stiffness valve of the above-mentioned related technology has the following defects in actual use: when the electromagnetic coil loses power, the stored elastic force of the elastic part between the moving iron core and the stop iron is large, causing the moving iron core to reset quickly, and the gasket on the end face of the valve core away from the valve seat quickly hits the bottom wall of the accommodating cavity of the stop iron; although the gasket can reduce the impact force between the valve core and the stop iron, since the gasket itself has a certain hardness, it will inevitably emit a collision noise when the gasket collides with the hard stop iron, and the user experience is poor. Utility Model Content

[0005] The technical problem to be solved by the present application is to overcome the defects of the above related technologies and provide a low-noise stiffness valve that can significantly reduce the impact force between the pad and the stop iron.

[0006] The technical solution of this application is to provide a low-noise stiffness valve with the following structure:

[0007] The valve body and valve seat, the valve body includes a valve shell, a valve core, a valve stem, a stop iron and an electromagnetic drive mechanism, the electromagnetic drive mechanism includes an electromagnetic coil and an axially movable moving iron core, an elastic part is connected between the moving iron core and the stop iron, and an accommodating cavity is provided on the end face of the stop iron close to the valve seat, the valve core is at least partially accommodated in the accommodating cavity, and a soft pad is connected to the end of the valve core close to the stop iron; a buffer made of flexible material is connected to the inner bottom wall of the accommodating cavity, and when the electromagnetic coil is in the de-energized state, the pad is against the buffer.

[0008] In some embodiments, the buffer member is a cylindrical buffer pad that matches the shape and size of the inner bottom wall of the accommodating cavity, and the buffer pad is connected to the inner bottom wall of the accommodating cavity.

[0009] In some embodiments, an annular connecting wall extending axially outward is provided at one end of the buffer pad away from the valve seat, an annular groove is provided on the inner bottom wall of the accommodating cavity, and the annular connecting wall is tightly fitted in the annular groove.

[0010] In some embodiments, the buffer pad is adhered to the inner bottom wall of the accommodating cavity.

[0011] In some embodiments, at least one permanent magnet assembly for magnetizing the moving iron core is connected to the valve body.

[0012] In some embodiments, the electromagnetic drive mechanism also includes a magnetic isolation sleeve sleeved inside the electromagnetic coil, the moving iron core slides into the magnetic isolation sleeve, and the stop iron is connected to the open end of the magnetic isolation sleeve; the permanent magnet assembly includes a magnetic conductive seat sleeved on the magnetic isolation sleeve, and at least one permanent magnet connected to the magnetic conductive seat.

[0013] In some embodiments, the magnetic conductive seat is sleeved on the magnetic isolation sleeve at one end of the electromagnetic coil away from the valve seat.

[0014] In some embodiments, the stop iron has a center hole, the valve stem is loosely fitted in the center hole and is connected to the moving iron core and the valve core respectively, and the accommodating cavity is coaxially arranged with the center hole.

[0015] In some embodiments, an annular groove is provided on the outer side wall of the stop iron, and a sealing ring is connected to the annular groove to seal with the valve housing.

[0016] In summary, the low-noise stiffness valve of the present application has the following advantages compared with the related art: the low-noise stiffness valve has a buffer made of a flexible material connected to the inner bottom wall of the accommodating chamber, which is used to make the pad and the buffer abut against each other when the pad is reset along with the valve core when the electromagnetic coil is de-energized. Because the pad is made of a soft material and the buffer is made of a flexible material, the collision between the pad and the buffer is a soft collision when they abut against each other, which can greatly weaken the collision force between the valve core and the stop iron, significantly reduce the collision noise, achieve a good silencing effect, and enhance the user experience during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a low-noise stiffness valve in some embodiments of the present application.

[0018] Figure 2 is a cross-sectional view of a low-noise stiffness valve according to some embodiments of the present application.

[0019] Figure 3 This is a three-dimensional diagram of the cross-sectional structure of a low-noise stiffness valve in some embodiments of the present application.

[0020] Figure 4 This is a schematic diagram of the partial cross-sectional structure of a low-noise stiffness valve in some embodiments of the present application.

[0021] Figure 5 This is a schematic diagram of the assembly structure of a low-noise stiffness valve in some embodiments of the present application.

[0022] Figure 6 This is a schematic structural diagram of a permanent magnet assembly of a low-noise stiffness valve in some embodiments of the present application.

[0023] Figure 7 This is a schematic structural diagram of a buffer component of a low-noise stiffness valve in some embodiments of the present application.

[0024] Description of reference numerals:

[0025] 1. Valve body, 100. Valve shell, 101. Seal, 102. Valve stem, 103. Iron stop, 104. Valve core, 105. Elastic member, 106. Accommodating chamber, 107. Gasket, 108. Annular connecting groove, 109. Sealing body, 110. Annular clamping groove, 111. Annular groove, 112. Sealing ring, 2. Valve seat, 200. First air hole, 201. Second air hole, 202. Valve port, 3. Electrical connection seat, 4. Electromagnetic drive mechanism, 400. Electromagnetic coil, 401. Moving iron core, 402. Magnetic isolation sleeve, 5. Buffer, 500. Annular connecting wall, 6. Permanent magnet assembly, 600. Magnetic seat, 601. Mounting groove, 602. Permanent magnet. DETAILED DESCRIPTION

[0026] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0027] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0028] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 7 As shown; an embodiment of the present application discloses a low-noise stiffness valve, which is used for an air pressure control valve of an automobile air suspension system, and its structure includes a valve body 1 and a valve seat 2 connected to the valve body 1, the valve body 1 includes a valve shell 100, a valve core 104, a valve stem 102, a stop iron 103 and an electromagnetic drive mechanism 4 for driving the valve core 104 to move axially to open or close the valve seat 2, the valve seat 2 has a valve cavity and a first air hole 200 arranged at the end of the valve seat 2, a plurality of second air holes 201 arranged on the side wall of the valve seat 2 and a valve port 202 arranged in the valve seat 2 and connecting the first air hole 200 and the second air hole 201; the valve core 104 is clearance-fitted in the valve cavity for opening or closing the valve port 202. The electromagnetic drive mechanism 4 includes an electromagnetic coil 400, a magnetic isolation sleeve 402 and a moving iron core 401 axially slidingly fitted in the magnetic isolation sleeve 402. The electromagnetic coil 400 is sleeved on the outside of the magnetic isolation sleeve 402. An elastic member 105 is connected between the moving iron core 401 and the stop iron 103.

[0031] Further in this embodiment, Figure 2As shown, the stop iron 103 is fixedly connected between the electromagnetic drive mechanism 4 and the valve seat 2. The stop iron 103 has a center hole. The valve stem 102 is loosely fitted in the center hole. One end of the valve stem 102 is connected to the moving iron core 401, and the other end of the valve stem 102 is connected to the valve core 104. The end of the valve housing 100 close to the electromagnetic drive mechanism 4 is connected to the electrical connection seat 3 electrically connected to the electromagnetic drive mechanism 4, and the end of the valve housing 100 close to the stop iron 103 is connected to the valve seat 2. The electrical connection seat 3 is electrically connected to the electromagnetic coil 400 of the electromagnetic drive mechanism 4. The electromagnetic coil 400 is energized to generate electromagnetic force to drive the moving iron core 401 to move axially. The moving iron core 401 drives the valve core 104 to move through the valve stem 102 to adjust the opening of the valve port 202. The first air hole 200 and the second air hole 201 of the stiffness valve of the embodiment of the present application are respectively connected to an air spring chamber of the automobile air suspension system. When the air spring needs to be closed to maintain or stabilize the air pressure, the electromagnetic drive mechanism 4 drives the valve core 104 to close the valve port 202 ; when the air spring pressure drops significantly and needs to be supplemented, the electromagnetic drive mechanism 4 drives the valve core 104 to open the valve port 202 .

[0032] In this embodiment, the first air hole 200 and the second air hole 201 both have air inlet and outlet, such as the first air hole 200 for air inlet and the second air hole 201 for air outlet; or the first air hole 200 for air outlet and the second air hole 201 for air inlet.

[0033] In this embodiment, if Figure 2 As shown, an annular groove 111 is provided on the outer wall of the stop iron 103, and a sealing ring 112 is connected to the annular groove 111 to seal with the valve housing 100. This arrangement ensures a stable connection and a good sealing effect between the stop iron 103 and the valve housing 100. The valve housing 100 is also connected to a sealing member 101, further stabilizing the connection of the rigid valve.

[0034] In this embodiment, if Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, an accommodating cavity 106 coaxial with the center hole of the stopper 103 is provided on the end surface of the stopper 103 near the valve seat 2. The accommodating cavity 106 is cylindrical, and its inner diameter matches the outer diameter of the valve core 104. The valve core 104 is at least partially accommodated in the accommodating cavity 106. That is, when the valve core 104 moves axially, the valve core 104 always has a portion of the accommodating cavity 106. In this embodiment of the present application, a soft cushion block 107 convex in the axial direction is connected to the end of the valve core 104 near the stopper 103. When the valve core 104 opens the valve port 202, the cushion block 107 on the valve core 104 can abut against the inner bottom wall of the accommodating cavity 106 of the stopper 103. The cushion block 107 is generally made of rubber with a certain hardness and elasticity. It is used to reduce the impact force between the valve core 104 and the stopper 103, thereby reducing noise.

[0035] In this embodiment, if Figure 2 and Figure 4 As shown, in order to improve the sealing between the valve core 104 and the inner wall of the accommodating chamber 106 and make the axial movement of the valve core more stable, an annular connecting groove 108 is provided on the inner wall of the accommodating chamber 106, and a sealing body is connected to the annular connecting groove 108 and fits the outer wall of the valve core.

[0036] It is easy to understand that when the electromagnetic coil 400 loses power, the elastic force stored in the elastic member 105 between the moving iron core 401 and the stop iron 103 is relatively large, causing the moving iron core 401 to quickly reset, and the pad 107 on the end face of the valve core 104 away from the valve seat 2 quickly hits the bottom wall of the accommodating cavity 106 of the stop iron 103; although the pad 107 can reduce the impact force between the valve core 104 and the stop iron 103, due to the fact that the pad 107 itself has a certain hardness, when the pad 107 collides with the hard stop iron 103, it is still inevitable to make a collision noise. For this reason, in this embodiment, if Figure 2 、 Figure 3 and Figure 4 As shown, a buffer member 5 made of a flexible material is connected to the inner bottom wall of the accommodating cavity 106. When the electromagnetic coil 400 is de-energized, the cushion block 107 abuts against the buffer member 5. Because the cushion block 107 is made of a soft material and the buffer member 5 is made of a flexible material, the collision between the cushion block 107 and the buffer member 5 is a soft collision. This can greatly weaken the collision force between the valve core 104 and the stop iron 103, significantly reducing collision noise, achieving a good silencing effect, and improving the user experience during use.

[0037] In the above embodiment, the pad 107 and the buffer member 5 are both made of flexible materials, such as rubber, silicone and the like, which have good buffering and shock absorbing effects.

[0038] In some embodiments, see Figure 2 、 Figure 4 and Figure 7 As shown, the buffer member 5 is a cylindrical cushion that matches the shape and size of the inner bottom wall of the accommodating cavity 106, and the cushion is connected to the inner bottom wall of the accommodating cavity 106. That is, the cushion is entirely covered and connected to the inner bottom wall of the accommodating cavity 106. When the cushion block 107 collides with the cushion, the cushion can buffer and absorb the impact force of the cushion block 107 on the valve core 104, better avoiding the impact force between the valve core 104 and the stop iron 103, and significantly reducing collision noise.

[0039] In some embodiments, in order to facilitate the assembly of the cushion, and to make the cushion assembly more stable and firm, and to prevent the cushion from falling off; Figure 4 and Figure 7As shown, an annular connecting wall 500 extending axially outward is provided at one end of the buffer gasket away from the valve seat 2. An annular retaining groove 110 is provided on the inner bottom wall of the accommodating cavity 106, and the annular connecting wall 500 fits tightly within the annular retaining groove 110. Therefore, when installing the buffer gasket, it is only necessary to insert the annular connecting wall 500 on the buffer gasket into the annular retaining groove 110 on the inner bottom wall of the accommodating cavity 106, making installation simple and convenient.

[0040] In other embodiments, the cushion may be fixedly connected to the inner bottom wall of the accommodating cavity 106 by bonding. Similarly, the cushion may be integrally formed on the inner bottom wall of the accommodating cavity 106 by vulcanization.

[0041] In other embodiments, the shape of the buffer member 5 may also be other shapes, such as a circular ring or square that matches the cushion block 107 , and the specific shape can be selected according to needs and installation convenience.

[0042] It is understood that when the electromagnetic coil 400 is energized to drive the movable iron core 401 toward the valve seat 2 to close the valve port 202, if the movable iron core 401 moves at a high speed, the sealing member at the free end face of the valve core 104 will abut against the valve port 202, causing a significant impact and thus generating noise. Similarly, after the electromagnetic coil 400 is de-energized, if the residual magnetism between the movable iron core 401 and the stop iron 103 is low, the movable iron core 401 will quickly reset, causing it to strike the bottom of the accommodating cavity 106 of the stop iron 103, thereby generating impact noise.

[0043] In this embodiment, the low noise stiffness valve further includes at least one permanent magnet component 6 connected to the valve body 1 for magnetizing the moving iron core 401, specifically, as Figure 5 and Figure 6 As shown, the permanent magnet assembly 6 includes a circular magnetic seat 600 that is sleeved on the magnetic isolation sleeve 402, that is, the magnetic seat 600 is sleeved on the magnetic isolation sleeve 402 at the end of the electromagnetic coil 400 away from the valve seat 2, and the magnetic seat 600 is provided with at least one mounting groove 601 along the circumferential direction, and each mounting groove 601 is connected to at least one permanent magnet 602.

[0044] In the above embodiment, the low-noise stiffness valve has a permanent magnet assembly 6 connected to the magnetic isolation sleeve 402, and a permanent magnet 602 connected to the magnetic base 600 of the permanent magnet assembly 6. The permanent magnet 602, while magnetizing the movable iron core 401, can also cause the movable iron core 401 to cut the magnetic flux lines generated by the permanent magnet 602 to generate resistance when the movable iron core 401 drives the valve core 104 to close the valve seat 2, thereby reducing the speed at which the valve core 104 moves to close the valve, thereby reducing the impact force between the free end face of the valve core 104 and the valve port 202 and reducing noise. In other words, after the electromagnetic coil loses power, the magnetic field generated by the permanent magnet will continue to magnetize the movable iron core, so that the movable iron core and the fixed iron core still have a magnetic attraction, thereby reducing the speed at which the valve core closes the valve. It is not difficult to understand that after the electromagnetic coil loses power, the magnetic field of the electromagnetic coil does not disappear immediately, but still exists for a certain period of time, thereby maintaining a certain magnetic attraction between the movable iron core and the fixed iron core, thereby reducing the speed at which the valve core closes the valve.

[0045] It is understood that before the electromagnetic coil 400 is energized, the permanent magnet 602 of the permanent magnet assembly 6 pre-magnetizes the movable iron core 401, thereby reducing the time required for the electromagnetic coil 400 to magnetize the movable iron core 401, increasing the rate of the magnetic force generated by the movable iron core 401, and improving the response speed of the stiffness valve. When the valve core 104 closes the valve seat 2 and maintains the valve seat 2 in the closed state, the magnetic force generated by the permanent magnet 602 and the electromagnetic force generated by the electromagnetic coil 400 are superimposed, thereby reducing the current flowing into the electromagnetic coil 400, thereby reducing the power consumption and heat generation of the stiffness valve, and thus extending the service life of the stiffness valve.

[0046] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0047] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0048] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A low-noise, high-rigidity valve, comprising a valve body and a valve seat, the valve body comprising a valve housing, a valve core, a valve stem, a stop iron, and an electromagnetic drive mechanism, the electromagnetic drive mechanism comprising an electromagnetic coil and an axially movable moving iron core, an elastic member connected between the moving iron core and the stop iron, an accommodating cavity being defined on an end surface of the stop iron proximate to the valve seat, the valve core being at least partially accommodated within the accommodating cavity, and a soft pad being connected to the end of the valve core proximate to the stop iron; characterized in that: A buffer made of flexible material is connected to the inner bottom wall of the accommodating cavity. When the electromagnetic coil is de-energized, the cushion block abuts against the buffer.

2. The low noise stiffness valve according to claim 1, characterized in that: The buffer component is a cylindrical buffer pad that matches the shape and size of the inner bottom wall of the accommodating cavity, and the buffer pad is connected to the inner bottom wall of the accommodating cavity.

3. The low noise stiffness valve according to claim 2, characterized in that: An annular connecting wall extending axially outward is provided at one end of the buffer pad away from the valve seat, an annular clamping groove is provided on the inner bottom wall of the accommodating cavity, and the annular connecting wall is tightly fitted in the annular clamping groove.

4. The low noise stiffness valve according to claim 2, characterized in that: The buffer pad is adhered to the inner bottom wall of the accommodating cavity.

5. The low noise stiffness valve according to claim 1, characterized in that: At least one permanent magnet component for magnetizing the moving iron core is connected to the valve body.

6. The low noise stiffness valve according to claim 5, characterized in that: The electromagnetic drive mechanism also includes a magnetic isolation sleeve sleeved inside the electromagnetic coil, the moving iron core slidingly fits inside the magnetic isolation sleeve, and the stop iron is connected to the open end of the magnetic isolation sleeve; the permanent magnet assembly includes a magnetic conductive seat sleeved on the magnetic isolation sleeve, and at least one permanent magnet connected to the magnetic conductive seat.

7. The low noise stiffness valve according to claim 6, characterized in that: The magnetic conductive seat is sleeved on the magnetic isolation sleeve at one end of the electromagnetic coil away from the valve seat.

8. The low noise stiffness valve according to claim 1, characterized in that: The stop iron has a central hole, the valve stem is loosely fitted in the central hole and is connected to the moving iron core and the valve core respectively, and the accommodating cavity is coaxially arranged with the central hole.

9. The low noise stiffness valve according to claim 1, characterized in that: An annular groove is provided on the outer side wall of the stop iron, and a sealing ring is connected in the annular groove and is sealed with the valve housing.

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