Air spring assembly, suspension system and vehicle

Abstract

The present application relates to an air spring assembly, which includes: an air spring body, a chamber is formed at the top of the air spring body, and the piston rod of the air spring body passes through the chamber; a vibration damping seat, the vibration damping seat is installed in the chamber, the top opening of the vibration damping seat is embedded with a cover, the bottom surface of the cover is formed with a bottom groove, an electromagnetic coil is installed in the bottom groove, and the electromagnetic coil and the top surface of the cover are both provided with a magnetic flow channel; a ring 1 located at the top of the cover and a ring 2 coaxially arranged in the ring 1, the ring 1 is assembled in the chamber, and a flexible diaphragm is installed between the ring 1 and the ring 2. The impact force and damping force of the vehicle can be attenuated by the magnetic flow damping and the vibration damping seat, avoiding the problem that traditional vibration damping relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

Description

Technical Field

[0001] The present application relates to the field of suspension systems, and in particular to an air spring assembly, a suspension system and a vehicle. Background Art

[0002] In the suspension system, elastic elements generate vibrations due to impact. In order to improve the smoothness of vehicle driving, shock absorbers are installed in series with the elastic elements in the suspension. In order to attenuate the vibrations, the shock absorbers used in the automobile suspension system are mostly hydraulic shock absorbers. Their working principle is that when the frame (or body) and the axle are vibrated and move relative to each other, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity through different pores into another cavity.

[0003] Many vehicles are equipped with suspension vibration reduction and cushioning systems that combine air springs and adjustable damping shock absorbers, but the suspension vibration reduction still relies on traditional rubber vibration isolation. Rubber vibration isolation is poor, and road vibrations can easily be transmitted to the vehicle through the piston rod, causing unusual noise inside the vehicle. Summary of the Invention

[0004] The present application provides an air spring assembly, a suspension system and a vehicle, which can attenuate the impact force and damping force of the vehicle through magnetic fluid damping and a shock-absorbing seat, avoiding the traditional vibration reduction that relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

[0005] In a first aspect, an embodiment of the present application provides an air spring assembly, comprising:

[0006] An air spring body, wherein a chamber is formed at the top of the air spring body, and a piston rod of the air spring body passes through the chamber;

[0007] A vibration damping seat is installed in the chamber, a top opening of the vibration damping seat is embedded with a cover, a bottom surface of the cover is provided with a bottom groove, an electromagnetic coil is installed in the bottom groove, and a magnetic flow channel is provided on the top surface of the electromagnetic coil and the cover;

[0008] A first ring is located at the top of the cover and a second ring is coaxially arranged inside the first ring, the first ring is assembled in the chamber, and a flexible diaphragm is installed between the first ring and the second ring;

[0009] The interiors of the first ring and the vibration damping seat are filled with magnetic fluid, and the piston rod passes through the vibration damping seat, the cover and the second ring, and is fixed to the vibration damping seat and the second ring.

[0010] In combination with the first aspect, in one embodiment, the vibration damping seat includes:

[0011] A rigid circular guide sleeve, wherein the rigid circular guide sleeve is fixed in the chamber;

[0012] A flexible vibration-damping sleeve, which is roughly in the shape of a truncated cone, with a wide end of the flexible vibration-damping sleeve coaxially fixed to one end of the rigid circular guide sleeve;

[0013] A rigid support seat, wherein the rigid support seat is generally in the shape of a truncated cone, an outer wall of the rigid support seat is fixed to a narrow end of the flexible vibration-damping sleeve, and the narrow end of the rigid support seat is located inside the flexible vibration-damping sleeve;

[0014] The piston rod coaxially passes through the rigid support seat, the flexible vibration-damping sleeve, the rigid annular guide sleeve, the sealing cover and the second ring, and the piston rod is fixed to the rigid support seat and the second ring.

[0015] In combination with the first aspect, in one embodiment, the vibration damping seat further includes:

[0016] A flexible limiting ring is coaxially fixed to the bottom surface of the rigid support seat.

[0017] In combination with the first aspect, in one embodiment, along the spacing direction of the rigid circular ring guide sleeve and the rigid support seat, the cross-sectional area of ​​the flexible vibration-damping sleeve gradually widens.

[0018] In combination with the first aspect, in one embodiment, the flexible membrane is wavy.

[0019] In combination with the first aspect, in one embodiment, the air spring assembly further includes:

[0020] An inner tube is sleeved on the outer wall of the piston rod, and the inner tube is located inside the electromagnetic coil and the vibration damping seat. The bottom end of the inner tube is fixed to the top of the vibration damping seat, and the top end is fixed to the bottom end of the ring 2.

[0021] In a second aspect, embodiments of the present application provide a suspension system comprising an air spring assembly as described in some of the above embodiments.

[0022] In conjunction with the second aspect, in one embodiment, the suspension system further includes:

[0023] a vibration isolation rate monitoring module, the vibration isolation rate monitoring module being used to monitor the vibration isolation rate of the vehicle body and the piston rod;

[0024] A controller is connected to the vibration isolation rate monitoring module by signal, and is used to reduce the current of the electromagnetic coil when the vibration isolation rate monitoring module monitors that the vibration isolation rate of the vehicle body is less than a set threshold.

[0025] In conjunction with the second aspect, in one embodiment, the vibration isolation rate monitoring module further includes:

[0026] a first acceleration sensor, the first acceleration sensor being mounted on the piston rod and being used to monitor the vertical acceleration of the piston rod;

[0027] a second acceleration sensor, the second acceleration sensor being mounted on the vehicle body and being used to monitor the vertical acceleration of the vehicle body;

[0028] a calculation module, configured to calculate a vibration isolation rate of the vehicle body based on values ​​of the first acceleration sensor and the second acceleration sensor;

[0029] The controller is configured to reduce the current flowing through the electromagnetic coil when the calculation module calculates that the vibration isolation rate of the vehicle body is less than a set threshold.

[0030] In a third aspect, an embodiment of the present application provides a vehicle comprising a suspension system as described in some of the above embodiments.

[0031] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0032] The interior of the shock absorber seat forms a lower chamber, while ring one, ring two, and the flexible diaphragm form an upper chamber. The magnetic flow channel connects the lower chamber and the upper chamber. When the vehicle is subjected to a vertical impact, the piston rod moves upward to compress the shock absorber seat, and drives ring two away from ring one, pulling the flexible diaphragm connected to it, causing the magnetic flow liquid in the lower chamber to flow to the upper chamber through the magnetic flow channel. According to the principle of small hole throttling, the magnetic flow damping and the shock absorber seat jointly achieve the attenuation of the vehicle's impact force and attenuation force. When different currents are passed through the electromagnetic coil, the viscosity of the magnetorheological fluid is different, resulting in changes in the damping force through the magnetic flow channel, resulting in different degrees of attenuation of the vehicle's impact force. This avoids the problem of traditional shock absorption relying on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 It is a schematic diagram of the main cross-sectional structure of the air spring assembly;

[0035] Figure 2 Schematic diagram of the three-dimensional structure of the vibration damping seat;

[0036] Figure 3 This is a schematic diagram of the main cross-sectional structure of the vibration damping seat;

[0037] Figure 4 Schematic diagram of the three-dimensional structure of ring 1 and ring 2;

[0038] Figure 5 This is a schematic diagram of the main cross-sectional structure of Ring 1 and Ring 2;

[0039] Figure 6 Schematic diagram of the three-dimensional structure of the cover;

[0040] Figure 7 It is a schematic diagram of the main cross-sectional structure of the cover.

[0041] In the figure: 1. Air spring body; 101. Chamber; 102. Piston rod; 2. Vibration damping seat; 201. Rigid circular ring guide sleeve; 202. Flexible vibration damping sleeve; 203. Rigid support seat; 204. Flexible limit ring; 3. Cover; 301. Bottom groove; 302. Wiring harness plug hole; 4. Electromagnetic coil; 5. Magnetic flow channel; 6. Ring one; 7. Ring two; 8. Flexible diaphragm; 9. Inner tube; 10. Wire. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The embodiments of the present application provide an air spring assembly, a suspension system, and a vehicle, which can attenuate the impact force and damping force of the vehicle through magnetic fluid damping and a shock-absorbing seat, avoiding the problem that traditional vibration reduction relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

[0044] First, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, an embodiment of the present application provides an air spring assembly, which includes: an air spring body 1, a chamber 101 is opened at the top of the air spring body 1, and a piston rod 102 of the air spring body 1 passes through the chamber 101; a vibration damping seat 2, the vibration damping seat 2 is installed in the chamber 101, and the top opening of the vibration damping seat 2 is embedded with a cover 3, the bottom surface of the cover 3 is opened with a bottom groove 301, an electromagnetic coil 4 is installed in the bottom groove 301, and a magnetic flow channel 5 is opened on the top surface of the electromagnetic coil 4 and the top surface of the cover 3; a ring 1 6 located at the top of the cover 3 and a ring 2 7 coaxially arranged in the ring 1 6, the ring 1 6 is assembled in the chamber 101, and a flexible diaphragm 8 is installed between the ring 1 6 and the ring 2 7; the interior of the ring 1 6 and the vibration damping seat 2 is filled with magnetic fluid, the piston rod 102 passes through the vibration damping seat 2, the cover 3 and the ring 2 7, and is fixed to the vibration damping seat 2 and the ring 2 7.

[0045] Exemplarily, the chamber 101 is concavely arranged, and the top end of the piston rod 102 coaxially extends to the outside of the chamber 101. A vibration damping seat 2 is fixed in the chamber 101, and the bottom end of the vibration damping seat 2 is fixed to the outer wall of the piston rod 102. The top opening of the vibration damping seat 2 is embedded with a cover 3, and the bottom surface of the cover 3 is provided with a bottom groove 301, and the bottom groove 301 is used to install the electromagnetic coil 4, and the electromagnetic coil 4 and the top surface of the cover 3 are both provided with a magnetic flow channel 5, ring one 6 is fixed in the chamber 101 and is located on the top surface of the cover 3, ring two 7 is sleeved and fixed on the outer wall of the piston rod 102, and a flexible diaphragm 8 is fixed between ring two 7 and ring one 6, and its magnetic flow channel 5 connects ring one 6 and the interior of the vibration damping seat 2.

[0046] Specifically, the interior of the shock absorber seat 2 forms a lower chamber, and ring 1 6, ring 2 7 and the flexible diaphragm 8 form an upper chamber. The magnetic flow channel 5 connects the lower chamber and the upper chamber. When the vehicle is subjected to a vertical impact, the piston rod 102 moves upward to compress the bottom end of the shock absorber seat 2, and drives ring 2 7 to move upward away from ring 1 6, pulling the flexible diaphragm 8 connected to it, causing the magnetic fluid in the lower chamber to flow to the upper chamber through the magnetic flow channel 5. According to the principle of small hole throttling, the magnetic flow damping and the shock absorber seat 2 jointly achieve the attenuation of the vehicle's impact force and damping force. Among them, when different currents are passed through the electromagnetic coil 4, the viscosity of the magnetorheological fluid is different, resulting in changes in the damping force through the magnetic flow channel, resulting in different degrees of attenuation of the vehicle's impact force. This avoids the problem that traditional shock absorption relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

[0047] In combination with the first aspect, in one embodiment, Figure 1 、 Figure 2 and Figure 3As shown, the vibration damping seat 2 includes: a rigid circular ring guide sleeve 201, which is fixed in the chamber 101; a flexible vibration damping sleeve 202, which is roughly arranged in a truncated cone shape, and the wide end of the flexible vibration damping sleeve 202 is coaxially fixed with one end of the rigid circular ring guide sleeve 201; a rigid support seat 203, which is roughly arranged in a truncated cone shape, and the outer wall of the rigid support seat 203 is fixed with the narrow end of the flexible vibration damping sleeve 202, and the narrow end of the rigid support seat 203 is located inside the flexible vibration damping sleeve 202; the piston rod 102 coaxially passes through the rigid support seat 203, the flexible vibration damping sleeve 202, the rigid circular ring guide sleeve 201, the sealing cover 3 and the ring 2 7, and the piston rod 102 is fixed to the rigid support seat 203 and the ring 2 7.

[0048] For example, the rigid circular guide sleeve 201 is coaxially fixed to the inner wall of the chamber 101, and a flexible vibration-damping sleeve 202 is fixed to the bottom end of the rigid circular guide sleeve 201. From top to bottom, the flexible vibration-damping sleeve 202 is wide at the top and narrow at the bottom. A rigid support seat 203 is fixed inside the bottom end of the flexible vibration-damping sleeve 202. The piston rod 102 coaxially passes through the rigid support seat 203, the flexible vibration-damping sleeve 202, the rigid circular guide sleeve 201, the cover 3 and the ring 2 7, and the piston rod 102 is fixed to the rigid support seat 203 and the ring 2 7. When the piston rod 102 moves upward, it will drive the rigid support seat 203 to move upward, causing the flexible vibration-damping sleeve 202 to be compressed between the rigid support seat 203 and the rigid circular guide sleeve 201, thereby reducing the volume of the lower chamber and causing the magnetic fluid in the lower chamber to flow to the upper chamber through the magnetic flow channel 5, thereby achieving magnetic fluid damping and the vibration-damping seat 2 to jointly attenuate the vehicle impact force and attenuation force. The flexible vibration-damping sleeve 202 is designed to be wide at the top and narrow at the bottom in order to provide good axial stability and to be able to withstand greater axial compression force of the piston rod.

[0049] In combination with the first aspect, in one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the vibration damping seat 2 may further include a flexible stop ring 204 coaxially fixed to the bottom surface of the rigid support seat 203. When the piston rod 102 moves downward, the flexible stop ring 204 is provided to prevent internal impact and abnormal noise, so that the flexible stop ring 204 is in flexible contact with the chamber 101.

[0050] In combination with the first aspect, in one embodiment, Figure 3 As shown, the cross-sectional area of ​​the flexible vibration damping sleeve 202 gradually widens along the spacing direction of the rigid annular guide sleeve 201 and the rigid support seat 203. The design purpose of the gradually widening cross-sectional area of ​​the flexible vibration damping sleeve 202 is also to improve axial stability and be able to withstand large axial compression force of the piston rod.

[0051] In combination with the first aspect, in one embodiment, Figure 1 and Figure 5 As shown, the flexible diaphragm 8 is wavy. The wavy shape of the flexible diaphragm 8 addresses volume changes in the upper and lower chambers caused by the flow of liquid within the two chambers. When the piston rod 102 moves upward, the volume of the lower chamber decreases, and the magnetic fluid moves upward, causing the magnetic fluid in the upper chamber to increase. At this point, the flexible diaphragm 8 expands, increasing the volume of the upper chamber. When the piston rod 102 moves downward, the volume of the lower chamber increases, and the magnetic fluid flows downward, causing the magnetic fluid in the upper chamber to decrease. At this point, the flexible diaphragm 8 contracts, reducing the volume of the upper chamber.

[0052] In combination with the first aspect, in one embodiment, Figure 1 、 Figure 6 and Figure 7 As shown, the air spring assembly may further include: an inner tube 9 sleeved on the outer wall of the piston rod 102, the inner tube 9 being located inside the electromagnetic coil 4 and the vibration damping seat 2, the bottom end of the inner tube 9 being fixed to the top end of the rigid vibration damping seat 203 of the vibration damping seat 2, and the top end thereof being fixed to the bottom end of the ring 2 7. Exemplarily, the inner tube 9 is sleeved on the outer wall of the piston rod 102 and is located between the rigid support seat 203 and the ring 2 7, and the bottom end of the inner tube 9 is fixedly engaged with the top end of the rigid support seat 203, and the top end thereof is fixedly engaged with the bottom end of the ring 2 7, which can improve the guiding and limiting effect of the piston rod 102, prevent the piston rod 102 from deflecting during axial movement, and achieve tensile limiting and flexible contact to prevent abnormal noise caused by impact.

[0053] In combination with the first aspect, in one embodiment, Figure 4 、 Figure 5 and Figure 6 As shown, the top surface of the cover 3 is provided with two harness insertion holes 302 , which are used for the wires 10 to pass through the bottom groove 301 and be electrically connected to the electromagnetic coil 4 , and the wires 10 also pass through the flexible diaphragm 8 to be connected to the external power supply.

[0054] Second, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, the embodiment of the present application provides a suspension system, which includes four air spring assemblies, and the air spring assembly includes: an air spring body 1, a chamber 101 is opened at the top of the air spring body 1, and a piston rod 102 of the air spring body 1 passes through the chamber 101; a vibration damping seat 2, the vibration damping seat 2 is installed in the chamber 101, and a cover 3 is embedded in the top opening of the vibration damping seat 2. The bottom surface of the cover 3 is opened with a bottom groove 301, and an electromagnetic coil is installed in the bottom groove 301. 4, the electromagnetic coil 4 and the top surface of the cover 3 are both provided with a magnetic flow channel 5; a ring 1 6 is located at the top of the cover 3 and a ring 2 7 is coaxially arranged in the ring 1 6, the ring 1 6 is assembled in the chamber 101, and a flexible diaphragm 8 is installed between the ring 1 6 and the ring 2 7; the interior of the ring 1 6 and the vibration damping seat 2 is filled with magnetic fluid, and the piston rod 102 passes through the vibration damping seat 2, the cover 3 and the ring 2 7, and is fixed to the vibration damping seat 2 and the ring 2 7.

[0055] Exemplarily, the chamber 101 is concavely arranged, and the top end of the piston rod 102 coaxially extends to the outside of the chamber 101. A vibration damping seat 2 is fixed in the chamber 101, and the bottom end of the vibration damping seat 2 is fixed to the outer wall of the piston rod 102. The top opening of the vibration damping seat 2 is embedded with a cover 3, and a bottom groove 301 is provided on the bottom surface of the cover 3. The bottom groove 301 is used to install the electromagnetic coil 4, and the electromagnetic coil 4 and the top surface of the cover 3 are both provided with a magnetic flow channel 5. Ring 1 6 is fixed in the chamber 101 and is located on the top surface of the cover 3. Ring 2 7 is sleeved and fixed on the outer wall of the piston rod 102, and a flexible diaphragm is fixed between Ring 2 7 and Ring 1 6, and its magnetic flow channel 5 connects Ring 1 6 and the interior of the vibration damping seat 2.

[0056] Specifically, the interior of the shock absorber seat 2 forms a lower chamber, and ring 1 6, ring 2 7 and the flexible diaphragm 8 form an upper chamber. The magnetic flow channel 5 connects the lower chamber and the upper chamber. When the vehicle is subjected to a vertical impact, the piston rod 102 moves upward to compress the bottom end of the shock absorber seat 2, and drives ring 2 7 to move upward away from ring 1 6, pulling the flexible diaphragm 8 connected to it, causing the magnetic fluid in the lower chamber to flow to the upper chamber through the magnetic flow channel 5. According to the principle of small hole throttling, the magnetic flow damping and the shock absorber seat 2 jointly achieve the attenuation of the vehicle's impact force and damping force. Among them, when different currents are passed through the electromagnetic coil 4, the viscosity of the magnetorheological fluid is different, resulting in changes in the damping force through the magnetic flow channel, resulting in different degrees of attenuation of the vehicle's impact force. This avoids the problem that traditional shock absorption relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

[0057] In conjunction with the second aspect, in one embodiment, Figure 1 、 Figure 2 and Figure 3As shown, the vibration damping seat 2 includes: a rigid circular ring guide sleeve 201, which is fixed in the chamber 101; a flexible vibration damping sleeve 202, which is roughly arranged in a truncated cone shape, and the wide end of the flexible vibration damping sleeve 202 is coaxially fixed with one end of the rigid circular ring guide sleeve 201; a rigid support seat 203, which is roughly arranged in a truncated cone shape, and the outer wall of the rigid support seat 203 is fixed with the narrow end of the flexible vibration damping sleeve 202, and the narrow end of the rigid support seat 203 is located inside the flexible vibration damping sleeve 202; the piston rod 102 coaxially passes through the rigid support seat 203, the flexible vibration damping sleeve 202, the rigid circular ring guide sleeve 201, the sealing cover 3 and the ring 2 7, and the piston rod 102 is fixed to the rigid support seat 203 and the ring 2 7.

[0058] For example, the rigid circular guide sleeve 201 is coaxially fixed to the inner wall of the chamber 101, and a flexible vibration-damping sleeve 202 is fixed to the bottom end of the rigid circular guide sleeve 201. From top to bottom, the flexible vibration-damping sleeve 202 is wide at the top and narrow at the bottom. A rigid support seat 203 is fixed inside the bottom end of the flexible vibration-damping sleeve 202. The piston rod 102 coaxially passes through the rigid support seat 203, the flexible vibration-damping sleeve 202, the rigid circular guide sleeve 201, the cover 3 and the ring 2 7, and the piston rod 102 is fixed to the rigid support seat 203 and the ring 2 7. When the piston rod 102 moves upward, it will drive the rigid support seat 203 to move upward, causing the flexible vibration-damping sleeve 202 to be compressed between the rigid support seat 203 and the rigid circular guide sleeve 201, thereby reducing the volume of the lower chamber and causing the magnetic fluid in the lower chamber to flow to the upper chamber through the magnetic flow channel 5, thereby achieving magnetic fluid damping and the vibration-damping seat 2 to jointly attenuate the vehicle impact force and attenuation force. The flexible vibration-damping sleeve 202 is designed to be wide at the top and narrow at the bottom in order to provide good axial stability and to be able to withstand greater axial compression force of the piston rod.

[0059] In conjunction with the second aspect, in one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the vibration damping seat 2 may further include a flexible stop ring 204 coaxially fixed to the bottom surface of the rigid support seat 203. When the piston rod 102 moves downward, the flexible stop ring 204 is provided to prevent internal impact and abnormal noise, so that the flexible stop ring 204 is in flexible contact with the chamber 101.

[0060] In conjunction with the second aspect, in one embodiment, Figure 3 As shown, the cross-sectional area of ​​the flexible vibration damping sleeve 202 gradually widens along the spacing direction of the rigid annular guide sleeve 201 and the rigid support seat 203. The purpose of the design of the flexible vibration damping sleeve 202 gradually widening the cross-sectional area is to provide good axial stability and be able to withstand large axial compression force of the piston rod.

[0061] In conjunction with the second aspect, in one embodiment, Figure 1 and Figure 5 As shown, the flexible diaphragm 8 is wavy. The wavy shape of the flexible diaphragm 8 addresses volume changes in the upper and lower chambers caused by the flow of liquid within the two chambers. When the piston rod 102 moves upward, the volume of the lower chamber decreases, and the magnetic fluid moves upward, causing the magnetic fluid in the upper chamber to increase. At this point, the flexible diaphragm 8 expands, increasing the volume of the upper chamber. When the piston rod 102 moves downward, the volume of the lower chamber increases, and the magnetic fluid flows downward, causing the magnetic fluid in the upper chamber to decrease. At this point, the flexible diaphragm 8 contracts, reducing the volume of the upper chamber.

[0062] In conjunction with the second aspect, in one embodiment, Figure 1 、 Figure 6 and Figure 7 As shown, the air spring assembly may further include: an inner tube 9 sleeved on the outer wall of the piston rod 102, the inner tube 9 being located inside the electromagnetic coil 4 and the vibration damping seat 2, the bottom end of the inner tube 9 being fixed to the top end of the vibration damping seat 2, and the top end thereof being fixed to the bottom end of the ring 2 7. Exemplarily, the inner tube 9 is sleeved on the outer wall of the piston rod 102 and is located between the rigid support seat 203 and the ring 2 7, and the bottom end of the inner tube 9 is fixedly engaged with the top end of the rigid support seat 203, and the top end thereof is fixedly engaged with the bottom end of the ring 2 7, which can improve the guiding and limiting effect of the piston rod 102, prevent the piston rod 102 from deflecting during axial movement, and achieve tensile limiting and flexible contact to prevent abnormal noise caused by impact.

[0063] In combination with the second aspect, in one embodiment, the suspension system further includes: a vibration isolation rate monitoring module, which is used to monitor the vibration isolation rate of the vehicle body and the piston rod 102; a controller, which is signal-connected to the vibration isolation rate monitoring module, and is used to reduce the current of the electromagnetic coil 4 when the vibration isolation rate monitoring module monitors that the vibration isolation rate of the vehicle body is less than a set threshold.

[0064] For example, the vehicle body's vibration isolation ratio T is required to be greater than or equal to 20dB. When the vibration isolation ratio monitoring module detects that the vehicle body's vibration isolation ratio is less than a set threshold of 20dB, the controller reduces the current flowing through electromagnetic coil 4, thereby lowering the viscosity of the magnetorheological fluid. This results in a decrease in the damping force through the magnetorheological fluid channel, thereby reducing the attenuation of impact forces on the vehicle. If the vibration isolation ratio monitoring module detects that the vehicle body's vibration isolation ratio is greater than or equal to the set threshold of 20dB, the controller does not issue any command, and the current flowing through electromagnetic coil 4 remains unchanged.

[0065] In combination with the second aspect, in one embodiment, the vibration isolation rate monitoring module also includes: a first acceleration sensor, the first acceleration sensor is installed on the piston rod 102, and the first acceleration sensor is used to monitor the vertical acceleration of the piston rod 102; a second acceleration sensor, the second acceleration sensor is used to be installed on the vehicle body, and the second acceleration sensor is used to monitor the vertical acceleration of the vehicle body; a calculation module, the calculation module calculates the vibration isolation rate of the vehicle body based on the values ​​of the first acceleration sensor and the second acceleration sensor; the controller is used to reduce the current of the electromagnetic coil 4 when the calculation module calculates that the vibration isolation rate of the vehicle body is less than a set threshold.

[0066] Exemplarily, the calculation formula of the calculation module is as follows:

[0067]

[0068] Wherein, T is the vibration isolation rate of the vehicle body, a1 is the vertical acceleration value of the piston rod 102 monitored by the first acceleration sensor, and a2 is the vertical acceleration value of the vehicle body monitored by the second acceleration sensor.

[0069] In a third aspect, an embodiment of the present application provides a vehicle, which includes a suspension system, which is installed on the vehicle body, and the suspension system includes four air spring assemblies, and the air spring assembly includes: an air spring body 1, a chamber 101 is opened at the top of the air spring body 1, and a piston rod 102 of the air spring body 1 passes through the chamber 101; a vibration damping seat 2, the vibration damping seat 2 is installed in the chamber 101, and a cover 3 is embedded in the top opening of the vibration damping seat 2, and a bottom groove 301 is opened on the bottom surface of the cover 3. An electromagnetic coil 4 is installed in the bottom groove 301, and a magnetic flow channel 5 is provided on the top surface of the electromagnetic coil 4 and the cover 3; a ring 1 6 is located at the top of the cover 3, and a ring 2 7 is coaxially arranged in the ring 1 6, the ring 1 6 is assembled in the chamber 101, and a flexible diaphragm 8 is installed between the ring 1 6 and the ring 2 7; the interior of the ring 1 6 and the vibration damping seat 2 is filled with magnetic flow liquid, and the piston rod 102 passes through the vibration damping seat 2, the cover 3 and the ring 2 7, and is fixed to the vibration damping seat 2 and the ring 2 7.

[0070] Exemplarily, the chamber 101 is concavely arranged, and the top end of the piston rod 102 coaxially extends to the outside of the chamber 101. A vibration damping seat 2 is fixed in the chamber 101, and the bottom end of the vibration damping seat 2 is fixed to the outer wall of the piston rod 102. The top opening of the vibration damping seat 2 is embedded with a cover 3, and a bottom groove 301 is provided on the bottom surface of the cover 3. The bottom groove 301 is used to install the electromagnetic coil 4, and the electromagnetic coil 4 and the top surface of the cover 3 are both provided with a magnetic flow channel 5. Ring 1 6 is fixed in the chamber 101 and is located on the top surface of the cover 3. Ring 2 7 is sleeved and fixed on the outer wall of the piston rod 102, and a flexible diaphragm is fixed between Ring 2 7 and Ring 1 6, and its magnetic flow channel 5 connects Ring 1 6 and the interior of the vibration damping seat 2.

[0071] Specifically, the interior of the shock absorber seat 2 forms a lower chamber, and ring 1 6, ring 2 7 and the flexible diaphragm 8 form an upper chamber. The magnetic flow channel 5 connects the lower chamber and the upper chamber. When the vehicle is subjected to a vertical impact, the piston rod 102 moves upward to compress the bottom end of the shock absorber seat 2, and drives ring 2 7 to move upward away from ring 1 6, pulling the flexible diaphragm 8 connected to it, causing the magnetic fluid in the lower chamber to flow to the upper chamber through the magnetic flow channel 5. According to the principle of small hole throttling, the magnetic flow damping and the shock absorber seat 2 jointly achieve the attenuation of the vehicle's impact force and damping force. Among them, when different currents are passed through the electromagnetic coil 4, the viscosity of the magnetorheological fluid is different, resulting in changes in the damping force through the magnetic flow channel, resulting in different degrees of attenuation of the vehicle's impact force. This avoids the problem that traditional shock absorption relies on rubber vibration isolation, which has poor vibration isolation effect and easily causes road vibration to be transmitted to the vehicle sound through the piston rod, causing abnormal noise in the vehicle.

[0072] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0073] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0074] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An air spring assembly, characterized in that: It includes: An air spring body (1), wherein a chamber (101) is formed at the top end of the air spring body (1), and a piston rod (102) of the air spring body (1) passes through the chamber (101); A vibration damping seat (2), the vibration damping seat (2) is installed in the chamber (101), a cover (3) is embedded in the top opening of the vibration damping seat (2), a bottom groove (301) is provided on the bottom surface of the cover (3), an electromagnetic coil (4) is installed in the bottom groove (301), and a magnetic flow channel (5) is provided on the top surface of the electromagnetic coil (4) and the cover (3); A first ring (6) is located at the top of the cover (3) and a second ring (7) is coaxially arranged inside the first ring (6), the first ring (6) is assembled in the chamber (101), and a flexible diaphragm (8) is installed between the first ring (6) and the second ring (7); The interior of the ring 1 (6) and the vibration damping seat (2) is filled with magnetic fluid, and the piston rod (102) passes through the vibration damping seat (2), the cover (3) and the ring 2 (7), and is fixed to the vibration damping seat (2) and the ring 2 (7); The vibration damping seat (2) comprises: A rigid circular guide sleeve (201), wherein the rigid circular guide sleeve (201) is fixed in the chamber (101); A flexible vibration-damping sleeve (202), the flexible vibration-damping sleeve (202) being arranged in a substantially truncated cone shape, and a wide end of the flexible vibration-damping sleeve (202) being coaxially fixed to one end of the rigid circular guide sleeve (201); a rigid support seat (203), the rigid support seat (203) being arranged in a substantially truncated cone shape, the outer wall of the rigid support seat (203) being fixed to the narrow end of the flexible vibration-damping sleeve (202), and the narrow end of the rigid support seat (203) being located inside the flexible vibration-damping sleeve (202); The piston rod (102) coaxially passes through the rigid support seat (203), the flexible vibration damping sleeve (202), the rigid annular guide sleeve (201), the sealing cover (3) and the second ring (7), and the piston rod (102) is fixed to the rigid support seat (203) and the second ring (7).

2. The air spring assembly according to claim 1, wherein: The vibration damping seat (2) further comprises: A flexible limiting ring (204) is coaxially fixed to the bottom surface of the rigid support seat (203).

3. The air spring assembly according to claim 1, wherein: Along the spacing direction between the rigid circular guide sleeve (201) and the rigid support seat (203), the cross-sectional area of ​​the flexible vibration-damping sleeve (202) gradually widens.

4. The air spring assembly according to claim 1, wherein: The flexible diaphragm (8) is wavy in shape.

5. The air spring assembly according to claim 1, wherein: The air spring assembly further includes: An inner tube (9) is sleeved on the outer wall of the piston rod (102), and the inner tube (9) is located inside the electromagnetic coil (4) and the vibration damping seat (2). The bottom end of the inner tube (9) is fixed to the top of the vibration damping seat (2), and the top end is fixed to the bottom end of the ring 2 (7).

6. A suspension system, characterized in that: It comprises the air spring assembly according to any one of claims 1 to 5.

7. The suspension system according to claim 6, wherein: The suspension system further comprises: A vibration isolation rate monitoring module, the vibration isolation rate monitoring module is used to monitor the vibration isolation rate between the vehicle body and the piston rod (102); A controller is connected to the vibration isolation rate monitoring module by signal, and is used to reduce the current of the electromagnetic coil (4) when the vibration isolation rate monitoring module monitors that the vibration isolation rate of the vehicle body is less than a set threshold.

8. The suspension system according to claim 7, wherein: The vibration isolation rate monitoring module also includes: a first acceleration sensor, the first acceleration sensor being mounted on the piston rod (102), the first acceleration sensor being used to monitor the vertical acceleration of the piston rod (102); a second acceleration sensor, the second acceleration sensor being mounted on the vehicle body and being used to monitor the vertical acceleration of the vehicle body; a calculation module, configured to calculate a vibration isolation rate of the vehicle body based on values ​​of the first acceleration sensor and the second acceleration sensor; The controller is used to reduce the energizing current of the electromagnetic coil (4) when the calculation module calculates that the vibration isolation rate of the vehicle body is less than a set threshold value.

9. A vehicle, characterized in that: It comprises a suspension system according to any one of claims 6-8.

Images