Active suspension with self-adjusting damping

Abstract

The present invention discloses a self-adjusting damping active suspension, comprising a rubber main spring, an upper flow channel plate, a decoupling membrane, a lower flow channel plate, and a sealing cup. The decoupling membrane is located between the upper and lower flow channel plates, forming an upper liquid chamber between the rubber main spring and the upper flow channel plate, and a lower liquid chamber between the lower flow channel plate and the sealing cup. The suspension also comprises a flow channel solenoid valve and a self-generating assembly. The rubber main spring comprises a main spring metal frame, the self-generating assembly is connected to the main spring metal frame, and the self-generating assembly is electrically connected to the flow channel solenoid valve, which is mounted on the decoupling membrane. When the main spring metal frame vibrates at high frequency with the vehicle, the main spring metal frame drives the self-generating assembly to generate electricity, which transmits current to the flow channel solenoid valve, opening the flow channel solenoid valve and connecting the upper and lower liquid chambers. When the main spring metal frame stops vibrating, the flow channel solenoid valve closes. The present invention can actively adjust damping and dynamic stiffness, achieving both good handling comfort and NVH requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic mounts, and in particular to a damping self-adjusting active mount. Background Art

[0002] Existing production hydraulic mounts all feature fixed flow paths. Meeting ride comfort requirements requires maximum damping, but meeting NVH requirements requires minimal damping and dynamic stiffness, creating a conflict between the two. The current approach results in compromised designs during the initial development phase, sacrificing both ride comfort and NVH performance.

[0003] Therefore, it is necessary to design a damping self-adjusting active suspension that can achieve good handling comfort and NVH requirements. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a damping self-adjusting active suspension that simultaneously achieves good handling comfort and NVH requirements.

[0005] The technical solution of the present invention provides a damping self-adjusting active suspension, comprising a rubber main spring, an upper flow channel plate, a decoupling membrane, a lower flow channel plate and a sealing leather cup, wherein the decoupling membrane is located between the upper flow channel plate and the lower flow channel plate, an upper liquid chamber is formed between the rubber main spring and the upper flow channel plate, and a lower liquid chamber is formed between the lower flow channel plate and the sealing leather cup, further comprising a flow channel solenoid valve and a self-generating assembly, wherein the rubber main spring comprises a main spring metal skeleton, the self-generating assembly is connected to the main spring metal skeleton, the self-generating assembly is electrically connected to the flow channel solenoid valve, and the flow channel solenoid valve is mounted on the decoupling membrane;

[0006] When the main spring metal frame vibrates at a high frequency along with the vehicle, the main spring metal frame drives the self-generating component to generate electricity, and the self-generating component transmits the current to the flow channel solenoid valve, which opens and connects the upper liquid chamber and the lower liquid chamber;

[0007] When the main spring metal skeleton stops vibrating, the flow channel solenoid valve is closed.

[0008] Furthermore, the flow channel solenoid valve includes an electromagnetic winding, a sealing switch, a valve body and a return spring, the electromagnetic winding is fixedly connected to the upper flow channel plate, the valve body is fixedly connected to the decoupling membrane and the lower flow channel plate, the valve body includes an upper channel and a lower channel, the upper channel is communicated with the upper liquid chamber, the lower channel is communicated with the lower liquid chamber, the upper channel is connected to the sealing switch, one end of the return spring is connected to the sealing switch, and the other end is connected to the valve body;

[0009] When the flow channel solenoid valve is powered off, the return spring drives the sealing switch to seal the upper channel;

[0010] When the flow channel electromagnetic valve is energized, the electromagnetic winding generates magnetic force and attracts the sealing switch to open the upper channel.

[0011] Furthermore, a sealing ring is provided at the upper channel, and the sealing ring is used to contact the sealing switch.

[0012] Furthermore, a gap is left between the electromagnetic winding and the upper flow channel plate, and the gap communicates with the upper liquid chamber and the upper channel.

[0013] Furthermore, the valve body is a cylinder with an open upper end, the upper channel is provided at the upper end opening of the valve body, and the lower channel is opened at the bottom of the valve body.

[0014] Furthermore, the self-generating component includes a permanent magnet vibrator and a stator winding. The permanent magnet vibrator is fixedly connected to the main spring metal frame. When the main spring metal frame vibrates at a high frequency, it drives the permanent magnet vibrator to reciprocate relative to the stator winding.

[0015] Furthermore, it also includes a stator cylinder, the stator winding is installed in the stator cylinder, the permanent magnet vibrator is inserted from the opening of the stator cylinder, the bottom of the stator cylinder is sealed, and the stator cylinder is fixedly connected to the upper flow channel plate, the decoupling membrane and the lower flow channel plate.

[0016] Furthermore, a flow channel is opened in the permanent magnet vibrator, and the flow channel includes an upper port and a lower port, connecting the upper and bottom parts of the permanent magnet vibrator. The bottom part of the permanent magnet vibrator is inserted into the stator cylinder, and the upper end of the flow channel is connected to the upper liquid chamber.

[0017] Furthermore, the length of the permanent magnet vibrator is smaller than the depth of the stator cylinder.

[0018] Furthermore, the permanent magnet vibrator and the main spring metal skeleton are vulcanized together.

[0019] The above technical solution has the following beneficial effects:

[0020] In this invention, when the vehicle is experiencing high-frequency vibration, the self-generating assembly vibrates along with the main spring metal frame, generating current. The flow channel solenoid valve opens, connecting the upper and lower liquid chambers, reducing the damping force of the liquid. When vibration ceases, the flow channel solenoid valve closes, increasing the damping force of the liquid. This invention automatically opens the flow channel solenoid valve according to the vehicle's varying states, eliminating the need for additional power or control systems to control the valve. It proactively adjusts damping and dynamic stiffness, achieving both excellent handling comfort and NVH requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0022] Figure 1 is a cross-sectional view of a damping self-adjusting active mount according to an embodiment of the present invention;

[0023] Figure 2 is a partial enlarged view of a flow channel solenoid valve in one embodiment of the present invention;

[0024] Figure 3 is a partial enlarged view of a self-generating component in one embodiment of the present invention;

[0025] Figure 4 It is a partial enlarged view of the stator winding and the stator cylinder in one embodiment of the present invention.

[0026] Reference table of accompanying symbols:

[0027] Rubber main spring 1: main spring metal frame 11;

[0028] Upper flow channel plate 2, decoupling membrane 3, lower flow channel plate 4, sealing leather cup 5, upper liquid chamber 6, lower liquid chamber 7;

[0029] Flow channel solenoid valve 8: electromagnetic winding 81, sealing switch 82, valve body 83, return spring 84, sealing ring 85, upper channel 831, lower channel 832;

[0030] Self-generating component 9: permanent magnet vibrator 91 , stator winding 92 , stator cylinder 93 , flow channel 911 , upper port 9111 , lower port 9112 . DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0032] It is easy to understand that according to the technical solution of the present invention, a variety of structural modes and implementation modes can be replaced with each other by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the invention.

[0033] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0034] In some embodiments of the present invention, Figure 1 As shown, the damping self-adjusting active suspension includes a rubber main spring 1, an upper flow channel plate 2, a decoupling membrane 3, a lower flow channel plate 4 and a sealing leather cup 5. The decoupling membrane 3 is located between the upper flow channel plate 2 and the lower flow channel plate 4. An upper liquid chamber 6 is formed between the rubber main spring 1 and the upper flow channel plate 2, and a lower liquid chamber 7 is formed between the lower flow channel plate 4 and the sealing leather cup 5. It also includes a flow channel solenoid valve 8 and a self-generating component 9. The rubber main spring 1 includes a main spring metal frame 11. The self-generating component 9 is connected to the main spring metal frame 11. The self-generating component 9 is electrically connected to the flow channel solenoid valve 8. The flow channel solenoid valve 8 is installed on the decoupling membrane 3;

[0035] When the main spring metal frame 11 vibrates at high frequency along with the vehicle, the main spring metal frame 11 drives the self-generating assembly 9 to generate electricity, and the self-generating assembly 9 transmits the current to the flow channel solenoid valve 8, which opens and connects the upper liquid chamber 6 and the lower liquid chamber 7;

[0036] When the main spring metal skeleton 11 stops vibrating, the flow channel solenoid valve 8 is closed.

[0037] Specifically, the decoupling membrane 3 is made of rubber and is located between the upper liquid chamber 6 and the lower liquid chamber 7 for isolating the upper and lower liquid chambers. Both the upper liquid chamber 6 and the lower liquid chamber 7 are filled with liquid.

[0038] The upper liquid chamber 6 is located between the rubber main spring 1 and the upper flow channel plate 2 , and the lower liquid chamber 7 is located between the lower flow channel plate 4 and the sealing leather cup 5 .

[0039] A main spring metal frame 11 is provided in the rubber main spring 1 , which is used to support the rubber main spring 1 and is also connected to the self-generating component 9 to transmit the high-frequency vibration of the rubber main spring 1 to the self-generating component 9 .

[0040] The self-generating component 9 generates electricity under high-frequency vibration, and the generated current is transmitted to the flow channel solenoid valve 8. The flow channel solenoid valve 8 is used to control the connection or disconnection between the upper liquid chamber 6 and the lower liquid chamber 7. When the flow channel solenoid valve 8 is energized, it opens, connecting the upper liquid chamber 6 and the lower liquid chamber 7, which is used to reduce the damping force of the liquid. The higher the frequency of vibration, the greater the current generated, the larger the opening of the flow channel solenoid valve 8, the greater the flow rate, and the better reduction of the damping force of the liquid. When the high-frequency vibration of the vehicle disappears, the flow channel solenoid valve 8 closes, and the damping force of the liquid increases.

[0041] The damping self-adjusting active suspension in this embodiment does not require an additional power supply or control system. It automatically adjusts the damping force according to the frequency of the vehicle's high-frequency vibration, while achieving good handling comfort and NVH requirements and reducing costs.

[0042] Furthermore, if Figure 2As shown, the flow channel solenoid valve 8 includes an electromagnetic winding 81, a sealing switch 82, a valve body 83 and a return spring 84. The electromagnetic winding 81 is fixedly connected to the upper flow channel plate 2, and the valve body 83 is fixedly connected to the decoupling membrane 3 and the lower flow channel plate 4. The valve body 83 includes an upper channel 831 and a lower channel 832. The upper channel 831 is connected to the upper liquid chamber 6, and the lower channel 832 is connected to the lower liquid chamber 7. The upper channel 831 is connected to the sealing switch 82. One end of the return spring 84 is connected to the sealing switch 82, and the other end is connected to the valve body 83.

[0043] When the flow channel solenoid valve 8 is powered off, the return spring 84 drives the sealing switch 82 to seal the upper channel 831;

[0044] When the flow channel solenoid valve 8 is energized, the electromagnetic winding 81 generates magnetic force and attracts the sealing switch 82 to open the upper channel 831 .

[0045] Specifically, the electromagnetic winding 81 is fixedly connected to the upper flow plate 2, with a certain distance between the electromagnetic winding 81 and the valve body 83. The sealing switch 82 is located between the electromagnetic winding 81 and the valve body 83. The upper end of the return spring 84 is connected to the sealing switch 82, and the lower end is connected to the bottom of the valve body 83. The return spring 84 applies a downward pulling force to the sealing switch 82, so that the sealing switch 82 is sealed and pressed against the upper channel 831 of the valve body 83. The valve body 83 passes through the decoupling membrane 3 and has an interference fit with the decoupling membrane 3. The upper channel 831 of the valve body 83 is connected to the upper liquid chamber 6. The lower portion of the valve body 83 is fixedly connected to the lower flow plate 4, and the lower channel 832 is connected to the lower liquid chamber 7.

[0046] When the electromagnetic winding 81 is energized, the electromagnetic winding 81 attracts the sealing switch 82, separating the sealing switch 82 from the valve body 83, thereby opening the upper channel 831. The liquid in the upper liquid chamber 6 flows from the upper channel 831 into the valve body 83, and then flows from the lower channel 832 into the lower liquid chamber 7. The flow rate between the upper liquid chamber 6 and the lower liquid chamber 7 is increased through the flow channel solenoid valve 8, thereby reducing the damping of the liquid.

[0047] When the electromagnetic winding 81 is powered off, the sealing switch 82 reseals the upper channel 831 under the action of the return spring 84, and the upper and lower liquid chambers can only communicate with the lower flow channel plate 3 through the upper flow channel plate 2, thereby increasing the damping of the liquid.

[0048] Furthermore, if Figure 2 As shown, a sealing ring 85 is provided at the upper channel 831 , and the sealing ring 85 is used to contact the sealing switch 82 .

[0049] Specifically, the upper channel 831 is a circular opening above the valve body 83, with a sealing ring 85 arranged along the circumference of the circular opening. The bottom of the sealing switch 82 is arc-shaped, used to block the upper channel 831 of the valve body 83. When the sealing switch 82 is attracted by the magnetic force of the electromagnetic winding 81, the bottom of the sealing switch 82 separates from the upper edge of the valve body 83, allowing the upper channel 831 to open. A portion of the sealing ring 85 is embedded in the valve body 83 to prevent it from falling out, while the remaining exposed area ensures a tight seal.

[0050] Furthermore, a gap is left between the electromagnetic winding 81 and the upper flow channel plate 2 , and the gap connects the upper liquid chamber 6 and the upper channel 831 .

[0051] Specifically, the electromagnetic winding 81 is fixedly connected to the upper flow channel plate 2 through multiple fixed points, and a certain gap is retained around the electromagnetic winding 81 and the upper flow channel plate 2 to ensure that the liquid flows from the upper liquid chamber 6 to the lower liquid chamber 7 through the valve body 83.

[0052] Furthermore, if Figure 2 As shown, the valve body 83 is a cylinder with an open upper end, the upper channel 831 is arranged at the upper end opening of the valve body 83, and the lower channel 832 is opened at the bottom of the valve body 83. The lower channel 832 is a plurality of square holes opened on the bottom side wall of the valve body 83.

[0053] Optionally, the lower channel 832 may also be of other shapes, or be opened at other positions of the valve body 83 .

[0054] Furthermore, if Figure 3 As shown, the self-generating component 9 includes a permanent magnet vibrator 91 and a stator winding 92. The permanent magnet vibrator 91 is fixedly connected to the main spring metal frame 11. When the main spring metal frame 11 vibrates at a high frequency, it drives the permanent magnet vibrator 91 to reciprocate relative to the stator winding 92.

[0055] Specifically, the permanent magnet vibrator 91 includes a plurality of permanent magnets arranged in the longitudinal direction, and the permanent magnet vibrator 91 is fixedly connected to the bottom of the main spring metal frame 11. Figure 4 As shown, a plurality of stator windings 92 are also arranged longitudinally.

[0056] When the vehicle vibrates at high frequency, the main spring metal frame 11 is driven to vibrate, and the main spring metal frame 11 drives the permanent magnet vibrator 91 to reciprocate up and down in the longitudinal direction. The stator winding 92 is fixed, and the permanent magnet vibrator 91 reciprocates to cut the stator winding 92 to generate current.

[0057] Furthermore, if Figure 3-4As shown, it also includes a stator cylinder 93, a stator winding 92 is installed in the stator cylinder 93, a permanent magnet vibrator 91 is inserted from the opening of the stator cylinder 93, the bottom of the stator cylinder 93 is sealed, and the stator cylinder 93 is fixedly connected to the upper flow channel plate 2, the decoupling membrane 3 and the lower flow channel plate 4.

[0058] Since the top of the stator cylinder 93 is open, the interior of the stator cylinder 93 is communicated with the upper liquid chamber 6 ; the bottom of the stator cylinder 93 is sealed, so the interior of the stator cylinder 93 is not communicated with the lower liquid chamber 7 .

[0059] Further, if Figure 3 As shown, a flow channel 911 is opened in the permanent magnet vibrator 91, and the flow channel 911 includes an upper port 9111 and a lower port 9112, connecting the upper and bottom parts of the permanent magnet vibrator 91. The bottom part of the permanent magnet vibrator 91 is inserted into the stator cylinder 93, and the upper end of the flow channel 911 is connected to the upper liquid chamber 6.

[0060] During the up and down movement of the permanent magnet vibrator 91, the bottom of the permanent magnet vibrator 91 compresses the liquid in the stator cylinder 93, generating a certain amount of resistance, which affects the damping force and dynamic and static stiffness. At the same time, the liquid needs to move back and forth through the gaps around the permanent magnet vibrator 91 and the stator cylinder 93, which may generate a certain amount of noise. To prevent the generation of noise, a flow channel 911 is provided in the middle of the permanent magnet vibrator 91. At high frequencies and small amplitudes, because the amplitude is small, the compression of the liquid is small, and the amount of liquid flowing in the flow channel 911 of the permanent magnet vibrator 91 is small, and no additional resistance is generated. At large amplitudes, the amplitude of the permanent magnet vibrator 91 is large, which greatly compresses the liquid, and the amount of liquid flowing in the flow channel 911 of the permanent magnet vibrator 91 is large, which generates a certain amount of damping force, further increasing the total damping force of the suspension, meeting the vehicle's requirement for high damping force at low frequencies and large amplitudes.

[0061] Furthermore, the length of the permanent magnet vibrator 91 is less than the depth of the stator cylinder 93. That is, a certain gap must be maintained between the bottom of the permanent magnet vibrator 91 and the bottom of the stator cylinder 93 to prevent interference during movement.

[0062] Preferably, a certain gap should be maintained between the top of the stator winding 92 and the main spring metal frame 11 to prevent interference during movement.

[0063] Preferably, the permanent magnet vibrator 91 and the main spring metal skeleton 11 are vulcanized together.

[0064] The working process of a preferred embodiment of the present invention is as follows:

[0065] Under normal circumstances, the sealing switch 82 is in a closed state under the action of the return spring 84. At this time, the liquid in the upper and lower liquid chambers can only circulate through the upper flow channel plate 2 and the lower flow channel plate 4, generating a damping force.

[0066] When the vehicle is in high-frequency vibration, the permanent magnet vibrator 91 vibrates together with the main spring metal frame 11, reciprocatingly cutting the stator winding 92 to generate current.

[0067] The current is transmitted to the electromagnetic winding 81 through the circuit. Under the action of the current, the electromagnetic winding 81 generates magnetic force. Under the action of the magnetic force, the sealing switch 82 will be in the open state, and the liquid in the upper and lower liquid chambers will be connected through the upper channel 831 and the lower channel 832, reducing the damping force of the liquid.

[0068] The higher the frequency, the greater the current generated, the larger the opening of the sealing switch 82, and the increase in the flow rate of the flow channel solenoid valve 8, which better reduces the damping force of the liquid.

[0069] The present invention automatically opens the flow channel solenoid valve according to different vehicle states, does not require additional power or control system to control the solenoid valve, can actively adjust the damping and dynamic stiffness, and can simultaneously achieve good operating comfort and NVH requirements.

[0070] The above description is only the principle and preferred embodiment of the present invention. It should be noted that for those skilled in the art, several other variations can be made based on the principle of the present invention, which should also be considered as the scope of protection of the present invention.

Claims

1. A damping self-adjusting active suspension, comprising a rubber main spring (1), an upper flow channel plate (2), a decoupling membrane (3), a lower flow channel plate (4) and a sealing leather cup (5), wherein the decoupling membrane (3) is located between the upper flow channel plate (2) and the lower flow channel plate (4), an upper liquid chamber (6) is formed between the rubber main spring (1) and the upper flow channel plate (2), and a lower liquid chamber (7) is formed between the lower flow channel plate (4) and the sealing leather cup (5), characterized in that: The rubber main spring (1) comprises a main spring metal skeleton (11); It also includes a flow channel solenoid valve (8) and a self-generating component (9), wherein the self-generating component (9) is electrically connected to the flow channel solenoid valve (8), and the flow channel solenoid valve (8) is installed on the decoupling membrane (3); The self-generating assembly (9) includes a permanent magnet vibrator (91), a stator winding (92) and a stator barrel (93). The permanent magnet vibrator (91) is fixedly connected to the main spring metal frame (11). The stator winding (92) is installed in the stator barrel (93). The permanent magnet vibrator (91) is inserted from the opening of the stator barrel (93). The bottom of the stator barrel (93) is sealed. The stator barrel (93) is connected to the upper flow channel plate (2) and the The decoupling membrane (3) and the lower flow channel plate (4) are fixedly connected. A flow channel (911) is provided in the permanent magnetic vibrator (91). The flow channel (911) includes an upper port and a lower port, which are connected to the upper part and the bottom part of the permanent magnetic vibrator (91). The bottom part of the permanent magnetic vibrator (91) is inserted into the stator cylinder (93). The upper end of the flow channel (911) is connected to the upper liquid chamber (6), and the stator cylinder (93) is not connected to the lower liquid chamber (7). When the main spring metal frame (11) vibrates at a high frequency along with the vehicle, it drives the permanent magnet vibrator (91) to reciprocate relative to the stator winding (92), and the main spring metal frame (11) drives the self-generating component (9) to generate electricity. The self-generating component (9) transmits the current to the flow channel solenoid valve (8), and the flow channel solenoid valve (8) opens, thereby connecting the upper liquid chamber (6) and the lower liquid chamber (7); When the main spring metal skeleton (11) stops vibrating, the flow channel electromagnetic valve (8) is closed.

2. The damping self-adjusting active mount according to claim 1, characterized in that: The flow channel solenoid valve (8) comprises an electromagnetic winding (81), a sealing switch (82), a valve body (83) and a return spring (84); the electromagnetic winding (81) is fixedly connected to the upper flow channel plate (2); the valve body (83) is fixedly connected to the decoupling membrane (3) and the lower flow channel plate (4); the valve body (83) comprises an upper channel (831) and a lower channel (832); the upper channel (831) is communicated with the upper liquid chamber (6); the lower channel (832) is communicated with the lower liquid chamber (7); the upper channel (831) is connected to the sealing switch (82); one end of the return spring (84) is connected to the sealing switch (82), and the other end is connected to the valve body (83); When the flow channel solenoid valve (8) is powered off, the return spring (84) drives the sealing switch (82) to seal the upper channel (831); When the flow channel electromagnetic valve (8) is energized, the electromagnetic winding (81) generates magnetic force and attracts the sealing switch (82) to open the upper channel (831).

3. The damping self-adjusting active mount according to claim 2, characterized in that: A sealing ring (85) is provided at the upper channel (831), and the sealing ring (85) is used to contact the sealing switch (82).

4. The damping self-adjusting active mount according to claim 2, characterized in that: A gap is left between the electromagnetic winding (81) and the upper flow channel plate (2), and the gap communicates with the upper liquid chamber (6) and the upper channel (831).

5. The damping self-adjusting active mount according to claim 2, characterized in that: The valve body (83) is a cylinder with an upper end opening, the upper channel (831) is provided at the upper end opening of the valve body (83), and the lower channel (832) is opened at the bottom of the valve body (83).

6. The damping self-adjusting active mount according to claim 1, characterized in that: The length of the permanent magnet vibrator (91) is smaller than the depth of the stator cylinder (93).

7. The damping self-adjusting active mount according to claim 1, characterized in that: The permanent magnet vibrator (91) is vulcanized together with the main spring metal skeleton (11).

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