Low noise stiffness valve

Abstract

The application belongs to the field of automobile suspension, and particularly relates to a low-noise stiffness valve, which comprises a valve seat having a first opening at one end, the end face of the first opening being provided with at least two sealing bosses surrounding the first opening; a valve core configured to be capable of approaching or moving away from the sealing bosses, the valve core being provided with a sealing gasket on the side opposite to the sealing bosses; the distance between the at least two sealing bosses and the sealing gasket is different, and the sealing gasket is in abutment with the at least two sealing bosses when the valve core closes the first opening. The distance between the multiple sealing bosses and the sealing gasket is different, the sealing gasket first contacts the sealing boss with the smallest distance therefrom, and then contacts other sealing bosses, the other sealing bosses play a supporting and buffering role on the sealing gasket, and the contact area between the sealing gasket and the valve seat is increased, so that the noise generated by the impact of the valve core and the valve seat can be effectively reduced. The service life of the stiffness valve can also be significantly improved.

Description

Technical Field

[0001] This application belongs to the field of automotive suspension, and in particular relates to a low-noise stiffness valve. Background Technology

[0002] The stiffness valve is installed between different chambers of the air spring that connects the car suspension to control the opening and closing of the chambers, thereby controlling the "softness" and "stiffness" of the air spring and adjusting the stiffness of the car suspension.

[0003] Normally, stiffness valves are driven by a coil to move the moving iron core, which in turn causes the valve core to close or open the communication channel on the valve seat. However, because the valve core moves at a relatively high speed, it will generate a lot of noise when the valve core hits the valve seat. Utility Model Content

[0004] To address the technical problem of excessive noise in existing stiffness valves, this application provides a low-noise stiffness valve.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a low-noise stiffness valve, comprising:

[0006] The valve seat has a first opening at one end, and at least two sealing bosses surrounding the first opening are on the end face of the first opening.

[0007] A valve core is configured to be able to approach or move away from the sealing boss, and a sealing gasket is provided on the side of the valve core opposite to the sealing boss; the distance between at least two of the sealing bosses and the sealing gasket is different, and when the valve core closes the first opening, the sealing gasket abuts against at least two of the sealing bosses.

[0008] In some embodiments, the valve seat sidewall has a second opening, and the first and second openings communicate through the inner cavity of the valve seat.

[0009] In some embodiments, the side of the sealing gasket opposite to the sealing boss is a plane, and at least two of the sealing bosses have different heights.

[0010] In some embodiments, the height of at least two of the sealing bosses gradually decreases as the distance between them and the first opening increases.

[0011] In some embodiments, the side of the sealing gasket opposite to the sealing boss is a conical surface protruding toward the first opening, and at least two sealing bosses have the same height.

[0012] In some embodiments, the side of the sealing gasket opposite to the sealing boss is a conical surface protruding toward the first opening, and the height of at least two sealing bosses gradually increases with the increase of the distance between them and the first opening.

[0013] In some embodiments, the number of sealing bosses is three.

[0014] In some embodiments, the valve core has an annular mounting groove on the side opposite to the sealing gasket, the sealing gasket has a protrusion that matches the annular mounting groove, and the sealing gasket has a flange that covers the side of the valve core.

[0015] Beneficial effects: By setting multiple sealing bosses with different distances between them and the sealing gasket, the sealing gasket first contacts the sealing boss with the smallest distance to it during the process of the valve core closing the first opening on the valve seat, and then contacts the other sealing bosses. The other sealing bosses provide support and buffer for the sealing gasket and increase the contact area between the sealing gasket and the valve seat, which can effectively reduce the noise generated by the impact between the valve core and the valve seat.

[0016] In addition, after the stiffness valve has been running for a long time, the wear of the gasket and the corresponding sealing boss at different positions will be different. Even if the gasket and the corresponding position of a certain sealing boss are severely worn, it will not affect the sealing fit between the gasket and other sealing bosses, which can significantly improve the service life of the stiffness valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the stiffness valve structure in one embodiment of this application;

[0018] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0019] Figure 3 This is a partial structural diagram of a stiffness valve according to another embodiment;

[0020] Figure 4 This is a partial structural diagram of a stiffness valve according to another embodiment;

[0021] In the figure: 1. Valve housing, 2. Coil, 3. Moving iron core, 4. Valve stem, 5. Stationary iron core, 6. Valve core, 61. Sealing gasket, 62. Protrusion, 63. Flange, 7. Valve seat, 71. First opening, 72. Second opening, 73. Sealing boss. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0023] like Figure 1As shown, the stiffness valve includes a valve body 1, a coil 2, a moving iron core 3, a stationary iron core 5, a valve core 6, and a valve seat 7. The coil 2 is installed inside the valve body 1. The moving iron core 3 is slidably installed inside the coil 2 and connected to a valve stem 4. One end of the valve stem 4 passes through the stationary iron core 5 and connects to the valve core 6 inside the valve seat 7. The valve seat 7 has a connecting channel that connects different chambers of the air spring. The moving iron core 3 drives the valve core 6 to move away from or towards the valve seat 7 within the chamber of the stationary iron core 5, thus opening or closing the connecting channel. When the valve core 6 moves rapidly and impacts the valve seat 7, it generates significant noise. To reduce the noise generated by the valve core 6 and valve seat 7 of the stiffness valve, as follows... Figures 1-4 As shown, the low-noise stiffness valve provided in this application has a valve seat 7 with a first opening 71 at one end. At least two sealing protrusions 73 surround the first opening 71 on its end face. A valve core 6 can approach or move away from the sealing protrusions 73. A sealing gasket 61, made of rubber, is provided on the side of the valve core 6 opposite to the sealing protrusions 73. The distances between the at least two sealing protrusions 73 and the sealing gasket 61 are different. When the valve core 6 closes the first opening 71, both the sealing gasket 61 and the sealing protrusions 73 abut against each other. The first opening 71 is an opening in a communication channel, communicating with the main chamber of the air spring. A second opening 72 is located on the side wall of the valve seat 7, communicating with the secondary chamber of the air spring. The first opening 71 and the second opening 72 communicate through the inner cavity of the valve seat 7, forming a communication channel. When it is necessary to close the connection channel, the control valve core 6 moves towards the first opening 71. The sealing boss 73 closest to the sealing gasket 61 on the valve core 6 first contacts the sealing gasket 61. The valve core 6 continues to move until multiple sealing bosses 73 are in contact with the sealing gasket 61, thus sealing the first opening 71. During this process, the sealing gasket 61 contacts multiple sealing bosses 73 sequentially, effectively buffering the impact between the valve core 6 and the valve seat 7. Moreover, the contact area between the sealing gasket 61 and the valve seat 7 gradually increases, effectively reducing the noise generated by the impact between the valve core 6 and the valve seat 7. The sealing gasket 61 has the greatest compression at the sealing boss 73 it contacts first, resulting in the best sealing effect. The compression at other sealing bosses 73 is smaller, which not only provides an auxiliary sealing effect but also effectively supports the valve core 6. This effectively reduces the impact and squeezing force of the valve seat 7 on the sealing gasket 61 at the point of maximum compression, slows down the wear of the sealing gasket 61 at that point, and improves the service life of the rigid valve. In addition, even if the sealing gasket 61 is severely worn at the point of maximum compression and cannot achieve an effective seal, the other sealing bosses 73 can still play a sealing role when in contact with the sealing gasket 61, further improving the service life of the rigid valve.

[0024] like Figure 1 and 2As shown, specifically, in some embodiments, the side of the sealing gasket 61 opposite to the sealing boss 73 is a plane, and at least two of the sealing bosses 73 have different heights. That is, different distances between the sealing bosses 73 and the sealing gasket 61 are achieved by setting sealing bosses 73 of different heights. Figure 1 and 2 As shown, three sealing bosses 73 are provided at one end of the first opening 71, and the height of the sealing bosses 73 decreases as the distance between them and the first opening 71 increases. That is, the innermost sealing boss 73 has the highest height, and the outermost sealing boss 73 has the lowest height. Figure 2 The dashed line indicates the height of two of the sealing bosses 73. When the valve core 6 moves toward the first opening 71 of the valve seat 7, the sealing gasket 61 first contacts the innermost sealing boss 73, and the position on the sealing gasket 61 with the greatest compression during sealing is also the position corresponding to the innermost sealing boss 73. Of course, in some other embodiments, setting the innermost sealing boss 73 to have the lowest height and the outermost sealing boss 73 to have the highest height can also achieve the same effect.

[0025] like Figure 3 As shown, in some other embodiments, the side of the sealing gasket 61 opposite to the sealing boss 73 is a conical surface protruding towards the first opening 71, and at least two of the sealing bosses 73 are of the same height. Figure 3 As shown, the three sealing bosses 73 are set to have the same height, while the sealing gasket 61 is set to be conical. The sealing gasket 61 first contacts the innermost sealing boss 73, and then the other sealing bosses 73 contact the sealing gasket 61, which can effectively buffer the impact between the valve core 6 and the valve seat 7. Moreover, when the rigid valve is in the open state, the conical sealing gasket 61 forms a guide surface, which can disperse the airflow of the first opening 71 and guide it to the second opening 72 on the side of the valve seat 7, thus guiding the airflow and reducing gas flow resistance and noise.

[0026] like Figure 4 As shown, in some other embodiments, the side of the sealing gasket 61 opposite to the sealing boss 73 is a conical surface protruding towards the first opening 71, and the height of at least two sealing bosses 73 gradually increases with the increase of the distance between them and the first opening 71. Figure 4 The dashed line indicates the height of two of the sealing bosses 73. This design, compared to a scheme where the sealing bosses 73 are all the same height, brings the outer sealing bosses 73 closer to the sealing gasket 61. This results in a smaller compression of the sealing gasket 61 by the innermost sealing boss 73, which is the first to come into contact with the sealing gasket 61. This helps to reduce the wear of the sealing gasket 61 while ensuring sealing performance.

[0027] like Figures 1-4As shown, to improve the stability of the sealing gasket 61 installation, in some embodiments, the valve core 6 has an annular mounting groove on the side opposite to the sealing gasket 61. The sealing gasket 61 is provided with a protrusion 62 that matches the annular mounting groove, and a flange 63 that covers the side of the valve core 6. By fitting the protrusion 62 of the sealing gasket 61 into the mounting groove of the valve core 6 and covering the side of the valve core 6 with the flange 63, the sealing gasket 61 is firmly assembled with the valve core 6, greatly improving the installation firmness of the sealing gasket 61.

[0028] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A low-noise stiffness valve, characterized in that, include, The valve seat (7) has a first opening (71) at one end, and at least two sealing bosses (73) surrounding the first opening (71) on the end face of the first opening (71). The valve core (6) is configured to be able to approach or move away from the sealing boss (73), and the valve core (6) has a sealing gasket (61) on the side opposite to the sealing boss (73); the distance between at least two of the sealing bosses (73) and the sealing gasket (61) is different, and when the valve core (6) closes the first opening (71), the sealing gasket (61) abuts against at least two of the sealing bosses (73).

2. The stiffness valve according to claim 1, characterized in that, The valve seat (7) has a second opening (72) on its side wall, and the first opening (71) and the second opening (72) are connected through the inner cavity of the valve seat (7).

3. The low-noise stiffness valve according to claim 1 or 2, characterized in that, The side of the sealing gasket (61) opposite to the sealing boss (73) is a plane, and at least two of the sealing bosses (73) have different heights.

4. The low-noise stiffness valve according to claim 3, characterized in that, The height of at least two of the sealing bosses (73) gradually decreases as the distance between them and the first opening (71) increases.

5. The low-noise stiffness valve according to claim 1 or 2, characterized in that, The side of the sealing gasket (61) opposite to the sealing boss (73) is a conical surface protruding towards the first opening (71), and at least two of the sealing bosses (73) are of the same height.

6. The low-noise stiffness valve according to claim 1 or 2, characterized in that, The side of the sealing gasket (61) opposite to the sealing boss (73) is a conical surface protruding towards the first opening (71), and the height of at least two of the sealing bosses (73) gradually increases with the increase of the distance between them and the first opening (71).

7. The low-noise stiffness valve according to claim 1 or 2, characterized in that, The number of sealing bosses (73) is three.

8. The low-noise stiffness valve according to claim 1 or 2, characterized in that, The valve core (6) has an annular mounting groove on the side opposite to the sealing gasket (61), the sealing gasket (61) has a protrusion (62) that matches the annular mounting groove, and the sealing gasket (61) has a flange (63) that covers the side of the valve core (6).

Images