A noise reduction electromagnetic spool for a vehicle air spring system

Abstract

The utility model discloses a kind of noise reduction solenoid valve core for vehicle air spring system, noise reduction solenoid valve core includes magnetic isolation sleeve, the iron core, armature, rubber block and valve nozzle are sequentially arranged from top to bottom in magnetic isolation sleeve, the iron core and valve nozzle are fixedly connected with magnetic isolation sleeve, the armature is fixedly connected with rubber block, the armature top end is equipped with spring mounting hole, spring is placed in the spring mounting hole;The iron core bottom end is equipped with iron core recess at the position with spring mounting hole opposite, the opening of the iron core recess is greater than the opening of spring mounting hole, the top end of the spring and the top surface of iron core recess abut, the bottom surface of the iron core except the iron core recess forms iron core flange.The noise of the noise reduction solenoid valve core is reduced when working.

Description

Technical Field

[0001] This utility model belongs to the field of air spring technology, specifically relating to a noise-reducing solenoid valve core for vehicle air spring systems. Background Technology

[0002] The air spring system of a vehicle is often referred to as an "air suspension system". It is a suspension system that uses compressible air as an elastic medium to replace traditional steel coil springs or leaf springs. Among them, the electronically controlled air suspension system can improve the comfort and handling stability of the vehicle and reduce the damage of the vehicle to the road surface. It is gradually being widely used in buses, trucks and other vehicles. The solenoid valve core can be used in the air spring system of the vehicle to connect and block the air passage.

[0003] Patent CN210141359U discloses a novel electromagnetic valve core structure for vehicles, comprising an iron core 1, a magnetic shielding sleeve 2, an armature 3, and a valve nozzle 8. The valve nozzle 8 is located at the front end of the magnetic shielding sleeve 2, and the magnetic shielding sleeve 2 and the valve nozzle 8 are connected by welding. A flange 5 is provided on the outer side of the magnetic shielding sleeve 2, and the flange 5 is connected to the magnetic shielding sleeve 2 by welding. The armature 3 is located directly below the valve nozzle 8. A rubber block 7 is provided between the armature 3 and the valve nozzle 8, and the rubber block 7 is bonded to the armature 3 with adhesive. Both the rubber block 7 and the armature 3 are located inside the magnetic shielding sleeve 2. The iron core 1 is placed inside the armature 3. The lower part of the sleeve 2 is fitted with an iron core 1, which is installed inside the magnetic shielding sleeve 2 with an interference fit. The iron core 1 is welded to the magnetic shielding sleeve 2. There is an air chamber 11 between the rubber block 7 and the valve nozzle 8. Air holes 12 are opened on both sides of the magnetic shielding sleeve 2. The air chamber 11 is connected to the air holes 12 on both sides of the magnetic shielding sleeve 2. The bottom end of the armature 3 has a mounting hole. A spring 4 is placed in the mounting hole. A positioning hole is opened on the iron core 1. The other end of the spring 4 abuts against the positioning hole opened on the iron core 1. The spring 4 is positioned by the mounting hole at the bottom end of the armature 3 and the positioning hole opened on the iron core 1. See the attached figure. Figure 1 By energizing the coil wound on the iron core 1, the iron core 1 is magnetized, attracting the armature 3 to move along the opening direction of the valve nozzle 8 until it momentarily contacts the upper end face of the iron core 1, thus opening the solenoid valve core. By de-energizing the coil wound on the iron core 1, the armature 3 moves along the closing direction of the valve nozzle 8 under the action of the spring 4 and resets, thus closing the solenoid valve core. Specifically, during the forward air intake process, the armature 3 drives the rubber block 7 to separate from the valve nozzle 8, and the gas enters from the gas channel 10 at the valve nozzle 8 and exits through the air hole 12 on the magnetic sleeve 2. After the armature 3 drives the rubber block 7 to re-contact the valve nozzle 8, the gas stops entering from the gas channel 10 on the valve nozzle 8, as shown in the attached diagram. Figure 2During the reverse air intake process, the armature 3 drives the rubber block 7 to separate from the valve nozzle 8. Gas enters through the air hole 12 on the magnetic sleeve 2 and exits through the gas passage 10 on the valve nozzle 8. After the armature 3 drives the rubber block 7 to re-contact the valve nozzle 8, gas stops entering through the air hole 12 on the magnetic sleeve 2, as shown in the attached diagram. Figure 3 .

[0004] In this patent, both the iron core 1 and the armature 3 are made of metal. The electromagnetic force generated when the solenoid valve core opens is relatively large. However, due to the large contact area between the iron core 1 and the armature 3 and the weak shock absorption performance between them, the noise generated by the collision between the metal iron core and the armature is significant, severely impacting the user experience. Therefore, there is an urgent need to improve the operating noise problem of the solenoid valve core. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a noise-reducing solenoid valve core for a vehicle air spring system, which reduces noise during operation.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A noise-reducing solenoid valve core for a vehicle air spring system includes a magnetic shielding sleeve. Inside the magnetic shielding sleeve, from top to bottom, are arranged an iron core, an armature, a rubber block, and a valve nozzle. The iron core and valve nozzle are fixedly connected to the magnetic shielding sleeve. The armature is fixedly connected to the rubber block. A spring mounting hole is formed at the top of the armature, and a spring is placed inside the spring mounting hole. At the bottom of the iron core, a core recess is formed at a position directly opposite the spring mounting hole. The opening of the core recess is larger than the opening of the spring mounting hole. The top of the spring abuts against the top surface of the core recess. The remaining portion of the bottom surface of the iron core, excluding the core recess, forms a core flange.

[0008] Furthermore, the recessed portion of the iron core is located at the middle of the bottom end of the iron core.

[0009] Furthermore, the outer edge of the top surface of the armature is recessed downward to form an armature recess, so that the remaining part of the top surface of the armature forms an armature boss, and the orthographic projection of the core recess is within the orthographic projection of the armature boss.

[0010] Furthermore, the outer edge of the top surface of the armature is recessed downward to form an armature recess, so that the remaining part of the top surface of the armature forms an armature boss, and the orthographic projection of the armature boss is within the orthographic projection of the core recess, and the vertical distance between the armature boss and the top surface of the core recess is greater than the vertical distance between the armature recess and the core flange.

[0011] Furthermore, when the bottom end of the iron core does not have an iron core recess, the top end of the armature is also provided with an armature recess that coincides with the axis of the spring mounting hole. The armature recess is located above the spring mounting hole and the opening of the armature recess is larger than the opening of the spring mounting hole. A shock-absorbing element is placed inside the armature recess, and the top ends of the spring and the shock-absorbing element abut against the bottom surface of the iron core.

[0012] Furthermore, the armature recess is located at the center of the top of the armature.

[0013] Furthermore, the damping element is damping rubber, and the damping rubber is sleeved on the outside of the spring.

[0014] Furthermore, the damping element is a damping spring, and the damping spring is sleeved on the outside of the spring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this invention, a recessed portion is formed at the bottom end of the iron core, directly opposite the spring mounting hole. The opening of the recessed portion is larger than the opening of the spring mounting hole. The top of the spring abuts against the top surface of the recessed portion. The remaining portion of the bottom surface of the iron core, excluding the recessed portion, forms a flange. By energizing the coil wound on the iron core, the iron core is magnetized, attracting the armature to move along the opening direction of the valve. The top surface of the armature then momentarily contacts the flange, thus opening the noise-reducing solenoid valve core. Since the opening of the recessed portion is larger than the opening of the spring mounting hole, the area of ​​the flange is reduced while the total area of ​​the bottom surface of the iron core remains constant. Consequently, the contact area between the top surface of the armature and the bottom surface of the iron core during contact and collision is reduced, thereby lowering the noise level and achieving noise reduction.

[0017] In this invention, when the bottom end of the iron core does not have a core recess, the top end of the armature also has an armature recess that coincides with the axis of the spring mounting hole. The armature recess is located above the spring mounting hole, and the opening of the armature recess is larger than the opening of the spring mounting hole. A damping element is placed inside the armature recess, and the top ends of both the spring and the damping element abut against the bottom surface of the iron core. Thus, by energizing the coil wound on the iron core, the iron core is magnetized, attracting the armature to move the damping element along the opening direction of the valve, and causing the top surface of the armature to instantly contact the bottom surface of the iron core. When the noise-reducing solenoid valve core is opened, the armature drives the damping element to move closer to the iron core. During this process, the damping element is compressed and generates a force opposite to the direction of movement of the armature, thereby reducing the collision force between the armature and the iron core and reducing the collision noise between the armature and the iron core. In addition, since the opening of the armature recess is larger than the opening of the spring mounting hole, the area of ​​the armature top surface that comes into contact with the bottom surface of the iron core is reduced when the total area of ​​the armature top surface is fixed. This also reduces the collision noise between the armature and the iron core.

[0018] In summary, the noise reduction solenoid valve core reduces noise during operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an existing solenoid valve core in the background art;

[0020] Figure 2 This is an enlarged schematic diagram of the forward air intake of an existing solenoid valve core in the background art;

[0021] Figure 3 This is an enlarged schematic diagram of the reverse air intake of the existing solenoid valve core in the background art;

[0022] Figure 4 This is a schematic diagram of the first embodiment of the noise-reducing solenoid valve core used in a vehicle air spring system according to this utility model.

[0023] Figure 5 This is a schematic diagram of the second embodiment of the noise-reducing solenoid valve core used in a vehicle air spring system according to this utility model.

[0024] Figure 6 This is a schematic diagram of the third embodiment of the noise-reducing solenoid valve core used in a vehicle air spring system according to this utility model.

[0025] Figure 7 This is a schematic diagram of the fourth embodiment of the noise-reducing solenoid valve core used in a vehicle air spring system according to this utility model.

[0026] Figure 8 This is a schematic diagram of the fifth embodiment of the noise-reducing solenoid valve core used in a vehicle air spring system according to this utility model.

[0027] The following are the annotations in the figure: 1. Iron core; 101. Iron core recess; 102. Iron core flange; 2. Magnetic shielding sleeve; 3. Armature; 301. Spring mounting hole; 302. Armature recess; 303. Armature boss; 304. Armature recess; 4. Spring; 5. Flange; 7. Rubber block; 8. Valve nozzle; 10. Gas passage; 11. Gas chamber; 12. Air hole; 13. Shock-absorbing rubber; 14. Shock-absorbing spring. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0029] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] like Figures 4-8 As shown, a noise-reducing solenoid valve core for a vehicle air spring system includes a magnetic shielding sleeve 2. Inside the magnetic shielding sleeve 2, an iron core 1, an armature 3, a rubber block, and a valve nozzle are arranged sequentially from top to bottom. The iron core 1 and the valve nozzle are fixedly connected to the magnetic shielding sleeve 2. The armature 3 is fixedly connected to the rubber block. A spring mounting hole 301 is provided at the top of the armature 3, and a spring 4 is placed inside the spring mounting hole 301.

[0033] In one embodiment,

[0034] like Figures 4-6 As shown, a core recess 101 is provided at the bottom end of the core 1 at a position directly opposite the spring mounting hole 301. Preferably, the core recess 101 is located at the middle of the bottom end of the core 1. The opening of the core recess 101 is larger than the opening of the spring mounting hole 301. The top end of the spring 4 abuts against the top surface of the core recess 101. The rest of the bottom surface of the core 1, excluding the core recess 101, forms a core flange 102.

[0035] By energizing the coil wound on the iron core 1, the iron core 1 is magnetized and the armature 3 is attracted to move along the opening direction of the valve nozzle, and the top surface of the armature 3 is made to instantly fit with the iron core flange 102 to open the noise reduction solenoid valve core. Since the opening of the iron core recess 101 is larger than the opening of the spring mounting hole 301, the area of ​​the iron core flange 102 is reduced when the total area of ​​the bottom surface of the iron core 1 is constant. As a result, the contact area between the top surface of the armature 3 and the bottom surface of the iron core 1 during the fitting and collision is reduced, thereby reducing the noise decibel value and achieving noise reduction.

[0036] In one preferred embodiment, the outer edge of the top surface of the armature 3 is recessed downward to form an armature recess 302, such that the remaining portion of the top surface of the armature 3 forms an armature boss 303, and the orthographic projection of the core recess 101 lies within the orthographic projection of the armature boss 303. Figure 5 .

[0037] By energizing the coil wound on the iron core 1, the iron core 1 is magnetized and the armature 3 is attracted to move along the opening direction of the valve. Since the orthographic projection of the iron core recess 101 is within the orthographic projection of the armature boss 303, only the armature boss 303 will momentarily fit with the iron core flange 102 to open the noise-reducing solenoid valve core. Therefore, the contact area between the top surface of the armature 3 and the bottom surface of the iron core 1 during the contact collision is further reduced, thereby further reducing the collision noise between the armature 3 and the iron core 1.

[0038] In another preferred embodiment, the outer edge of the top surface of the armature 3 is recessed downward to form an armature recess 302, such that the remaining portion of the top surface of the armature 3 forms an armature boss 303, and the orthographic projection of the armature boss 303 lies within the orthographic projection of the core recess 101, and the vertical distance between the armature boss 303 and the top surface of the core recess 101 is greater than the vertical distance between the armature recess 302 and the core flange 102. Figure 6 .

[0039] By energizing the coil wound on the iron core 1, the iron core 1 is magnetized, attracting the armature 3 to move along the opening direction of the valve. Since the orthographic projection of the armature boss 303 is within the orthographic projection of the iron core recess 101, and the vertical distance between the armature boss 303 and the top surface of the iron core recess 101 is greater than the vertical distance between the armature recess 302 and the iron core flange 102, only the armature recess 302 will momentarily contact the iron core flange 102 to open the noise-reducing solenoid valve core. Therefore, the contact area between the top surface of the armature 3 and the bottom surface of the iron core 1 during the contact collision will be further reduced, thereby further reducing the collision noise between the armature 3 and the iron core 1.

[0040] In another embodiment,

[0041] like Figure 7 and Figure 8 As shown, when the core 1 does not have a core recess 101 at the bottom, the armature 3 also has an armature recess 304 at the top end that coincides with the axis of the spring mounting hole 301. Preferably, the armature recess 304 is located at the middle of the top end of the armature 3, the armature recess 304 is above the spring mounting hole 301 and the opening of the armature recess 304 is larger than the opening of the spring mounting hole 301. A damping element is placed in the armature recess 304, and the top ends of the spring 4 and the damping element are in contact with the bottom surface of the core 1.

[0042] By energizing the coil wound on the iron core 1, the iron core 1 is magnetized, attracting the armature 3 to move the damping element along the opening direction of the valve, and the top surface of the armature 3 is brought into instantaneous contact with the bottom surface of the iron core 1 to open the noise-reducing solenoid valve core. During the process of the armature 3 moving the damping element closer to the iron core 1, the damping element is compressed and generates a force opposite to the direction of movement of the armature 3, so as to reduce the collision force between the armature 3 and the iron core 1 and reduce the collision noise between the armature 3 and the iron core 1. In addition, since the opening of the armature recess 304 is larger than the opening of the spring mounting hole 301, the area of ​​the top surface of the armature 3 that comes into contact with the bottom surface of the iron core 1 is reduced when the total area of ​​the top surface of the armature 3 is fixed, which also reduces the collision noise between the armature 3 and the iron core 1.

[0043] In one preferred embodiment, the damping element is damping rubber 13, and the damping rubber 13 is sleeved on the outside of the spring 4, see Figure 7 .

[0044] In another preferred embodiment, the damping element is a damping spring 14, and the damping spring 14 is sleeved on the outside of the spring 4, see... Figure 8 .

[0045] The working method of the noise-reducing solenoid valve core with a core recess 101 at the bottom of the core 1 is as follows: By energizing the coil wound on the core 1, the core 1 is magnetized and the armature 3 is attracted to move along the opening direction of the valve mouth, and the top surface of the armature 3 is made to instantly fit with the core flange 102 to open the noise-reducing solenoid valve core. The opening of the core recess 101 is larger than the opening of the spring mounting hole 301. In this way, with a fixed total area of ​​the bottom surface of the core 1, the area of ​​the core flange 102 is reduced, and the contact area between the top surface of the armature 3 and the bottom surface of the core 1 during the contact collision is reduced, thereby reducing the noise decibel value and achieving noise reduction. By de-energizing the coil wound on the core 1, the armature 3 is moved along the closing direction of the valve mouth and reset under the action of the spring 4 to close the noise-reducing solenoid valve core.

[0046] For noise-reducing solenoid valve cores where the bottom end of the iron core 1 does not have a core recess 101, the working method is as follows: By energizing the coil wound on the iron core 1, the iron core 1 is magnetized, attracting the armature 3 to move the damping element along the opening direction of the valve nozzle, and the top surface of the armature 3 is made to momentarily contact the bottom surface of the iron core 1 to open the noise-reducing solenoid valve core. During the process of the armature 3 moving the damping element closer to the iron core 1, the damping element is compressed and generates a force opposite to the direction of movement of the armature 3, so as to reduce the friction between the armature 3 and the iron core. The collision force between the armature 3 and the iron core 1 is reduced, and the collision noise between the armature 3 and the iron core 1 is reduced. The opening of the armature recess 304 is larger than the opening of the spring mounting hole 301. In this way, with a fixed total area of ​​the top surface of the armature 3, the area of ​​the top surface of the armature 3 that comes into contact with the bottom surface of the iron core 1 is reduced. This can also reduce the collision noise between the armature 3 and the iron core 1. By de-energizing the coil wound on the iron core 1, the armature 3 moves and resets along the closing direction of the valve mouth under the action of the spring 4, so as to close the noise reduction solenoid valve core.

[0047] In summary, compared with existing solenoid valve cores in the background art, the noise-reducing solenoid valve core of this utility model does not produce obvious noise after the solenoid valve core is energized and opened, thus improving the product experience.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A noise-reducing solenoid valve core for a vehicle air spring system, comprising a magnetic shielding sleeve (2), wherein an iron core (1), an armature (3), a rubber block, and a valve nozzle are arranged sequentially from top to bottom inside the magnetic shielding sleeve (2), the iron core (1) and the valve nozzle are fixedly connected to the magnetic shielding sleeve (2), the armature (3) is fixedly connected to the rubber block, and a spring mounting hole (301) is provided at the top of the armature (3), wherein a spring (4) is placed inside the spring mounting hole (301); characterized in that: The bottom end of the iron core (1) has an iron core recess (101) at a position directly opposite to the spring mounting hole (301). The opening of the iron core recess (101) is larger than the opening of the spring mounting hole (301). The top end of the spring (4) abuts against the top surface of the iron core recess (101). The remaining part of the bottom surface of the iron core (1) except for the iron core recess (101) forms an iron core flange (102).

2. The noise-reducing solenoid valve core for a vehicle air spring system according to claim 1, characterized in that: The core recess (101) is located at the middle of the bottom end of the core (1).

3. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 2, characterized in that: The outer edge of the top surface of the armature (3) is recessed downward to form an armature recess (302), so that the remaining part of the top surface of the armature (3) forms an armature boss (303), and the orthographic projection of the core recess (101) is within the orthographic projection of the armature boss (303).

4. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 2, characterized in that: The outer edge of the top surface of the armature (3) is recessed downward to form an armature recess (302), so that the remaining part of the top surface of the armature (3) forms an armature boss (303), and the orthographic projection of the armature boss (303) is within the orthographic projection of the core recess (101), and the vertical distance between the armature boss (303) and the top surface of the core recess (101) is greater than the vertical distance between the armature recess (302) and the core flange (102).

5. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 1, characterized in that: When the core (1) does not have a core recess (101) at the bottom, the armature (3) is provided with an armature recess (304) at the top end that coincides with the axis of the spring mounting hole (301). The armature recess (304) is located above the spring mounting hole (301) and the opening of the armature recess (304) is larger than the opening of the spring mounting hole (301). A damping element is placed in the armature recess (304). The top ends of the spring (4) and the damping element are in contact with the bottom surface of the core (1).

6. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 5, characterized in that: The armature recess (304) is located at the middle of the top of the armature (3).

7. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 6, characterized in that: The damping element is a damping rubber (13), and the damping rubber (13) is sleeved on the outside of the spring (4).

8. A noise-reducing solenoid valve core for a vehicle air spring system according to claim 6, characterized in that: The damping element is a damping spring (14), and the damping spring (14) is sleeved on the outside of the spring (4).

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