Suspension structure for automobile

Abstract

The present invention relates to the field of automobile suspension technology. The present application discloses an automobile suspension structure, including a telescopic rod, a strip hole is drilled on the outer surface of the telescopic rod at a position above the stop plate, a pressure regulating spring is fixedly installed on the top of the air guide device by a clamping method, and the strip hole is completely located inside the shaft sleeve device in the initial state. When the vehicle travels to a road section with a small bump amplitude, the road radar of the vehicle can identify the bump amplitude of the road surface, and judge that the bump degree does not require the main air pump to be started to supply air to the inside of the airbag, and only the buffer spring I, buffer spring II and buffer spring III are used for shock absorption through passive buffering, thereby avoiding the problem that the internal compressed gas is overheated due to frequent starting of the pump air machine for providing compressed gas, resulting in changes in compression performance and changes in shock absorption performance, thereby improving the stability of the shock absorption operation of the device.

Description

Technical Field

[0001] The present application relates to the technical field of automobile suspension, and in particular to a suspension structure for an automobile. Background Art

[0002] The suspension structure is a very important structure in a car. It is connected to the chassis at the bottom and the frame at the top, which plays a role in alleviating vibrations. With the development of technology, the traditional suspension structure that uses springs for shock absorption has gradually evolved into air suspension and electromagnetic suspension. These two suspensions have better shock absorption effects and can be used in conjunction with road condition radar for advance buffering, thereby greatly reducing the amplitude of vibrations. As costs decrease, air suspensions are gradually being used in some lower-priced family cars, and their popularity is gradually expanding.

[0003] The traditional air suspension is composed of a main air pump, an upper stroke rod, a lower stroke rod, an air guide device and an air bag. The two ends of the air bag are respectively connected to the upper stroke rod and the lower stroke rod, and the two ends of the air guide device are respectively connected to the inner cavity of the air bag and the main air pump. When the vehicle-mounted road condition radar detects a pothole ahead, the main air pump will fill the air bag with compressed gas to increase the pressure inside the air bag, so that when the wheel enters the pothole, the wheel will move downward under the action of the air pressure and contact the bottom of the pothole. Under the action of the air pressure in the air bag, the frame will not experience large bumps, so that the bumps felt by the people in the car are greatly reduced. This type of air suspension is currently the most widely used one, with the advantages of simple structure, easy use and low cost.

[0004] Although the existing automobile suspension device has many advantages as mentioned above, it still has certain limitations in actual use. Since the main air pump will work first, the compressed gas will enter the airbag, which will increase the frame height and the occupants will be subjected to overweight. After driving out of the pit, the airbag will deflate, which will reduce the frame height and the occupants will be subjected to weightlessness. Under the effects of overweight and weightlessness, the waist of the human body needs to bear a large force, which will cause the occupants to easily suffer from waist discomfort during long-term driving. In this regard, the present application document proposes an automobile suspension structure, which aims to solve the above-mentioned problems. Summary of the invention

[0005] The present application proposes a suspension structure for automobiles, which has the advantages of reducing the amplitude and the operating frequency of the air pump, and is used to solve the problem of large force on the waist and overheating of the gas.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a suspension structure for an automobile, comprising a suspension frame and a frame, an adjustment device is fixedly installed on the top of the suspension frame by welding, a telescopic device is movably installed inside the adjustment device by telescopic cooperation, a fixed top seat is fixedly installed on the bottom of the frame by welding, an annular connecting plate is integrally casted on the outer surface of the fixed top seat near the middle, an airbag is fixedly installed on the outer surface of the annular connecting plate by snap-fitting, a shaft sleeve device is movably installed inside the fixed top seat by telescopic cooperation, the inside of the shaft sleeve device is movably sleeved with the telescopic device by telescopic cooperation, an air guide hole II is drilled on one side of the outer surface of the fixed top seat near the frame by drilling, and one end of the air guide hole II is connected to the main air pump through the air guide pipe I.

[0007] Furthermore, the regulating device includes a regulating air chamber, the interior of the regulating air chamber cooperates with the telescopic device through a telescopic cooperation manner, the top of the regulating air chamber is provided with a spring protection plate through integral casting, a connecting hole is drilled through a drilling machine at a position inside the spring protection plate on the top of the regulating air chamber, the connecting hole is directly connected to the inner cavity of the regulating air chamber, an air guide hole I is opened on one side of the outer surface of the regulating air chamber near the suspension frame, the air guide hole I is connected to the inner cavity of the regulating air chamber, and one end of the air guide hole I is connected to the main air pump through an air guide pipe II.

[0008] Furthermore, the outer surface of the spring protection plate is fixedly connected to one end of the airbag, the connection between the airbag and the annular connecting plate and the connection between the airbag and the spring protection plate are both sealed, and the material of the airbag is a soft high-pressure resistant rubber material.

[0009] Furthermore, the telescopic device includes a telescopic rod, and a spring base is provided at the bottom of the outer surface of the telescopic rod by integral casting. The top and bottom of the spring base are respectively fixedly installed with a buffer spring I and a buffer spring II by a clamping method. The top of the buffer spring I is connected to the top of the inner cavity of the regulating air chamber by a clamping method, and the bottom of the buffer spring II is connected to the bottom of the inner cavity of the regulating air chamber by a clamping method. A spring connecting plate is provided at a position near the middle and lower part of the outer surface of the telescopic rod by integral casting. A buffer spring III is fixedly installed at the bottom of the spring connecting plate by a clamping method, and the bottom of the buffer spring III is connected to the top of the regulating air chamber by a clamping method. A stop plate is fixedly installed at a position near the middle and upper part of the inner cavity of the telescopic rod by welding, a limiting slide rail is arranged at a position above the stop plate in the inner cavity of the telescopic rod by integral casting, and the number of the limiting slide rails is four and distributed in a circular array, the inner cavity of the telescopic rod is located above the stop plate and an air guide device is movably installed in cooperation with the limiting slide rail, strip holes are drilled on the outer surface of the telescopic rod at a position above the stop plate, and the number of the strip holes is four and distributed in a circular array, a pressure-adjusting spring is fixedly installed on the top of the air guide device by clamping, and the top of the pressure-adjusting spring is connected to the sleeve device by clamping.

[0010] Furthermore, the air guide device includes a travel block, the outer surface of which is provided with a slide groove by means of grooving with a milling machine, the number of the slide grooves is four and they are distributed in a circular array, the slide groove cooperates with the limiting slide rail by sliding, an air intake groove is opened at the center position of the top of the travel block by means of drilling with a drilling machine, a flow hole I is opened on the inner wall of the air intake groove by means of drilling with a drilling machine, the flow hole I passes through the travel block and extends to the outer surface, and the penetration point is located between the slide grooves.

[0011] Furthermore, the bushing device includes a lower bushing, which is movably sleeved inside the fixed top seat by telescopic cooperation, and the top of the lower bushing is fixedly mounted with an upper bushing by integral casting, and a lower bushing hole is formed inside the lower bushing by drilling, and an upper bushing hole is formed on the top by drilling, and the upper bushing extends to a position connected with the lower bushing, and a flow hole II is provided at the bottom of the inner cavity of the upper bushing, and the bottom of the flow hole II is connected to the pressure regulating spring by clamping.

[0012] Furthermore, the flow hole I is in a corresponding relationship with the strip hole in the longitudinal position.

[0013] This application has the following beneficial effects.

[0014] 1. Since the strip hole is completely located inside the bushing device in the initial state, when the vehicle travels to a road section with a smaller bump amplitude, the vehicle's built-in road radar can identify the bump amplitude of the road and determine the bump degree. There is no need to start the main air pump to supply air to the inside of the airbag. Shock absorption is only performed by passive buffering through buffer springs I, II and III, thereby avoiding the problem of overheating of the internal compressed gas caused by frequent starting of the pump air machine used to provide compressed gas, resulting in changes in compression performance and subsequent changes in shock absorption performance, thereby improving the stability of the shock absorption operation of the device.

[0015] 2. When the vehicle passes through a road section with a large bumpy amplitude, the road surface radar will detect it and control the main air pump to work before the vehicle reaches the rugged road. At this time, the air pump will inject a large amount of compressed gas into the inside of the bushing device through the air guide hole Ⅱ. At this time, the telescopic device as a whole will move in the vertical downward direction. In this process, the buffer spring Ⅰ and buffer spring Ⅱ will first undergo elastic deformation, and then transmit the force to the suspension frame, so that the vehicle will be lifted in a small range and a small amplitude, greatly reducing the overweight caused by the inflation of the main air pump. Subsequently, the displacement of the telescopic device will cause the strip hole to extend from the inside of the bushing device, so that the gas will pass through the flow hole Ⅰ. The strip hole enters the interior of the airbag. At this time, the air suspension takes effect and is lifted. In this process, the time point when the air suspension takes effect is pushed back, and the shock absorption of the traditional suspension is used to alleviate the overweight effect caused by the operation of the total air pump, so as to avoid the air suspension directly lifting the frame and causing the driver to be in an overweight state. The air pump in the traditional air suspension is activated in advance, causing the driver to be in an overweight state. Although the maximum amplitude during the bumping process is reduced, the number of bumping cycles is increased, which increases the force on the human waist and causes waist pain after long-term driving, thereby improving the driving experience.

[0016] 3. The driver can adjust the main air pump and inject a certain amount of compressed gas into the regulating air chamber through the air guide hole Ⅰ, so as to increase the pressure of the cavity below the air guide device inside the telescopic rod. Under the action of this pressure, the initial position of the air guide device is raised. When the vehicle travels to a rough road, the main air pump supplies air to the inside of the lower bushing, which will first overcome the pressure of the cavity below the air guide device inside the telescopic rod and drive the air guide device to reset first, and then drive the telescopic device as a whole to continue to move, thereby increasing the triggering threshold of the air suspension, so that different drivers can adjust the triggering threshold of the air suspension and the road feedback intensity according to different driving needs, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0018] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a front view schematic diagram of the structure of the present invention;

[0021] Figure 3 The structure of the present invention Figure 2 Schematic diagram of the cross section in the AA direction;

[0022] Figure 4 It is a schematic diagram of the structural adjustment device of the present invention;

[0023] Figure 5 It is a front view schematic diagram of the structure adjustment device of the present invention;

[0024] Figure 6 The structure of the present invention Figure 5 Schematic diagram of the cross section in the BB direction;

[0025] Figure 7 It is a schematic diagram of the structural telescopic device of the present invention;

[0026] Figure 8 It is a front and bottom view of the structural telescopic device of the present invention;

[0027] Fig. 9 The structure of the present invention Figure 8 Schematic diagram of the cross section in the CC direction;

[0028] Fig.10 It is a schematic diagram of the structural air guide device of the present invention;

[0029] Fig.11 It is a front view schematic diagram of the gas guide device of the structure of the present invention;

[0030] Fig.12 The structure of the present invention Fig.11 Schematic diagram of the cross section in the middle DD direction;

[0031] Fig.13 The structure of the present invention Fig.12 Schematic diagram of the cross section in the EE direction;

[0032] Fig.14 This is a schematic diagram of the structural sleeve device of the present invention;

[0033] Fig.15 It is a front view schematic diagram of the shaft sleeve device of the present invention;

[0034] Fig.16 The structure of the present invention Fig.15 Schematic diagram of the cross section in the FF direction.

[0035] In the figure; 1. suspension frame; 2. frame; 3. adjusting device; 31. adjusting air chamber; 32. spring protection plate; 33. connecting hole; 34. air guide hole I; 4. telescopic device; 41. telescopic rod; 42. spring base; 43. buffer spring I; 44. buffer spring II; 45. spring connecting plate; 46. buffer spring III; 47. stop plate; 48. limit slide rail; 49. air guide device; 491. travel block; 492. slide groove; 493. air inlet groove; 494. circulation hole I; 401. strip hole; 402. pressure regulating spring; 5. fixed top seat; 6. annular connecting plate; 7. air bag; 8. bushing device; 81. lower bushing; 82. upper bushing; 83. lower shaft hole; 84. upper shaft hole; 85. circulation hole II; 9. air guide hole II. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] A suspension structure for automobiles, please refer to Figure 1-Figure 3 , including a suspension frame 1 and a frame 2, an adjusting device 3 is fixedly installed on the top of the suspension frame 1 by welding, a telescopic device 4 is movably installed inside the adjusting device 3 by telescopic cooperation, a fixed top seat 5 is fixedly installed on the bottom of the frame 2 by welding, an annular connecting plate 6 is integrally casted on the outer surface of the fixed top seat 5 near the middle, an air bag 7 is fixedly installed on the outer surface of the annular connecting plate 6 by snap connection, a shaft sleeve device 8 is movably installed inside the fixed top seat 5 by telescopic cooperation, the inside of the shaft sleeve device 8 is movably sleeved with the telescopic device 4 by telescopic cooperation, an air guide hole II 9 is drilled on one side of the outer surface of the fixed top seat 5 near the frame 2 by drilling, and one end of the air guide hole II 9 is connected to the main air pump through the air guide pipe I.

[0038] Please refer to Figure 1-Figure 6The regulating device 3 includes a regulating air chamber 31, the interior of the regulating air chamber 31 cooperates with the telescopic device 4 by telescopic cooperation, the top of the regulating air chamber 31 is provided with a spring protection plate 32 by integral casting, a connecting hole 33 is drilled by a drilling machine at a position inside the spring protection plate 32 at the top of the regulating air chamber 31, and the connecting hole 33 is directly connected to the inner cavity of the regulating air chamber 31, and an air guide hole Ⅰ34 is opened on one side of the outer surface of the regulating air chamber 31 near the suspension frame 1, and the air guide hole Ⅰ34 is connected to the inner cavity of the regulating air chamber 31, and one end of the air guide hole Ⅰ34 is connected to the main air pump through the air guide pipe Ⅱ.

[0039] Please refer to Figure 1-Figure 6 The outer surface of the spring protection plate 32 is fixedly connected to one end of the airbag 7. The connection between the airbag 7 and the annular connecting plate 6 and the connection between the airbag 7 and the spring protection plate 32 are both sealed. The material of the airbag 7 is a soft high-pressure resistant rubber material.

[0040] Please refer to Figure 4-Figure 9 The telescopic device 4 includes a telescopic rod 41, and a spring base 42 is provided at the bottom of the outer surface of the telescopic rod 41 by an integral casting method. The top and bottom of the spring base 42 are respectively fixedly installed with a buffer spring I 43 and a buffer spring II 44 by a clamping method. The top of the buffer spring I 43 is connected to the top of the inner cavity of the regulating air chamber 31 by a clamping method, and the bottom of the buffer spring II 44 is connected to the bottom of the inner cavity of the regulating air chamber 31 by a clamping method. A spring connecting plate 45 is provided at a position near the middle and lower part of the outer surface of the telescopic rod 41 by an integral casting method. A buffer spring III 46 is fixedly installed at the bottom of the spring connecting plate 45 by a clamping method. The bottom of the buffer spring III 46 is connected to the top of the regulating air chamber 31 by a clamping method. The telescopic rod 4 A stop plate 47 is fixedly installed by welding at a position near the middle and slightly above the inner cavity of the telescopic rod 41, and a limit slide rail 48 is provided by integral casting at a position above the stop plate 47 in the inner cavity of the telescopic rod 41. The number of the limit slide rails 48 is four and they are distributed in a circular array. The inner cavity of the telescopic rod 41 is located above the stop plate 47 and an air guide device 49 is movably installed in a manner cooperating with the limit slide rail 48. A strip hole 401 is drilled by a drilling machine at a position above the stop plate 47 on the outer surface of the telescopic rod 41. The number of the strip holes 401 is four and they are distributed in a circular array. A pressure regulating spring 402 is fixedly installed on the top of the air guide device 49 by a clamping manner, and the top of the pressure regulating spring 402 is connected to the shaft sleeve device 8 by a clamping manner.

[0041] Please refer to Figure 9-13The air guide device 49 includes a travel block 491, and a slide groove 492 is provided on the outer surface of the travel block 491 by means of milling machine grooving. The number of the slide grooves 492 is four and they are distributed in a circular array. The slide grooves 492 cooperate with the limiting slide rail 48 by sliding. An air inlet groove 493 is drilled by a drilling machine at the center position of the top of the travel block 491, and a flow hole I 494 is drilled by a drilling machine on the inner wall of the air inlet groove 493. The flow hole I 494 penetrates the travel block 491 and extends to the outer surface, and the penetration point is located between the slide grooves 492.

[0042] Please refer to Figure 9-Figure 16 The sleeve device 8 includes a lower sleeve 81, which is movably sleeved inside the fixed top seat 5 by telescopic cooperation. The top of the lower sleeve 81 is fixedly installed with an upper sleeve 82 by integral casting. A lower shaft hole 83 is drilled inside the lower sleeve 81 by drilling a hole. An upper shaft hole 84 is drilled on the top of the upper sleeve 82 by drilling a hole. The upper shaft hole 84 extends to a position connected with the lower shaft hole 83. A flow hole II 85 is provided at the bottom of the inner cavity of the upper shaft hole 84. The bottom of the flow hole II 85 is connected to the pressure regulating spring 402 by clamping.

[0043] Please refer to Figure 1-Figure 13 The flow hole I 494 is in a corresponding relationship with the strip hole 401 in the longitudinal position, and the strip hole 401 is completely located inside the sleeve device 8 in the initial state.

[0044] Among them, since the strip hole 401 is completely located inside the bushing device 8 in the initial state, when the vehicle travels to a section of road with a smaller bump amplitude, the vehicle's built-in road radar can identify the bump amplitude of the road and judge the bump degree. There is no need to start the main air pump to supply air to the inside of the airbag 7. Only the buffer spring I 43, buffer spring II 44 and buffer spring III 46 are used for passive buffering to reduce shock, thereby avoiding the problem of frequent starting of the pump air machine used to provide compressed gas causing overheating of the internal compressed gas, resulting in changes in compression performance and changes in shock absorption performance, thereby improving the stability of the shock absorption operation of the device.

[0045] Among them, when the vehicle passes through a road section with a large bumpy amplitude, the road surface radar will control the main air pump to work before the vehicle reaches the rugged road after discovering it. At this time, the air pump will inject a large amount of compressed gas into the interior of the bushing device 8 through the air guide hole Ⅱ9. At this time, the telescopic device 4 will move in the vertical downward direction as a whole. In this process, the buffer spring Ⅰ43 and the buffer spring Ⅱ44 will first undergo elastic deformation, and then transmit the force to the suspension frame 1, so that the vehicle will be lifted in a small range and a small amplitude, greatly reducing the overweight caused by the inflation of the main air pump, and then the displacement of the telescopic device 4 will cause the strip hole 401 to extend from the inside of the bushing device 8, so that the gas passes The flow hole I 494 and the strip hole 401 enter the interior of the airbag 7. At this time, the air suspension takes effect and is lifted. In this process, the time point when the air suspension takes effect is pushed back, and the shock absorption of the traditional suspension is used to alleviate the overweight effect caused by the operation of the total air pump, so as to avoid the air suspension directly lifting the frame and causing the driver to be in an overweight state. The air pump in the traditional air suspension is activated in advance, causing the driver to be in an overweight state. Although the maximum amplitude during the bumping process is reduced, the number of bumping cycles is increased, which increases the force on the human waist and causes waist pain during long-term driving, thereby improving the driving experience.

[0046] Among them, the driver can adjust the main air pump and inject a certain amount of compressed gas into the interior of the adjustment air chamber 31 through the air guide hole Ⅰ34, so as to increase the pressure of the cavity below the air guide device 49 inside the telescopic rod 41. Under the action of this pressure, the initial position of the air guide device 49 is raised. When the vehicle travels to a rough road, the main air pump supplies air to the interior of the lower bushing 81, and it will first overcome the pressure of the cavity below the air guide device 49 inside the telescopic rod 41, and drive the air guide device 49 to reset first, and then drive the telescopic device 4 as a whole to continue to move, thereby increasing the triggering threshold of the air suspension, so that different drivers can adjust the triggering threshold of the air suspension and the road feedback intensity according to different driving needs, thereby improving the practicality of the device.

[0047] The method of use of the present invention is as follows:

[0048] Before driving, the driver can adjust the main air pump and inject a certain amount of compressed gas into the adjusting air chamber 31 through the air guide hole Ⅰ34, so as to increase the pressure of the cavity below the air guide device 49 inside the telescopic rod 41. Under the action of this pressure, the initial position of the air guide device 49 is raised. When the vehicle travels to a rough road, the main air pump supplies air to the inside of the lower bushing 81. It will first overcome the pressure of the cavity below the air guide device 49 inside the telescopic rod 41 and drive the air guide device 49 to reset first, and then drive the telescopic device 4 to continue to move as a whole, thereby increasing the triggering threshold of the air suspension. The triggering threshold of the air suspension and the road feedback intensity can be adjusted according to different driving needs.

[0049] During driving, in the initial state, the strip hole 401 is completely located inside the bushing device 8, so that when the vehicle travels to a road section with a smaller bump amplitude, the road surface radar of the vehicle can identify the bump amplitude of the road surface, and judge that the bump degree does not need to start the main air pump to supply air to the inside of the airbag 7, and only the buffer spring I 43, buffer spring II 44 and buffer spring III 46 are used for shock absorption through passive buffering. When the vehicle passes through a road section with a larger bump amplitude, the road surface radar will control the main air pump to work before the vehicle reaches the rugged road after discovering it. At this time, the air pump will inject a large amount of compressed gas into the inside of the bushing device 8 through the air guide hole II 9. At this time, the telescopic device The entire device 4 will move in a vertical downward direction. During this process, the buffer spring I 43 and the buffer spring II 44 will first undergo elastic deformation, and then transmit the force to the suspension frame 1, so that the vehicle will be lifted in a small range and small amplitude, greatly reducing the overweight caused by the inflation of the total air pump. Subsequently, the displacement of the telescopic device 4 will cause the strip hole 401 to extend from the inside of the sleeve device 8, so that the gas will enter the inside of the airbag 7 through the flow hole I 494 and the strip hole 401. At this time, the air suspension will take effect and lift. In this process, the time point when the air suspension takes effect is pushed back, and the shock absorption of the traditional suspension is used to alleviate the overweight effect caused by the operation of the total air pump.

Claims

1. A suspension structure for an automobile, characterized in that: The invention comprises a suspension frame (1) and a vehicle frame (2), wherein an adjusting device (3) is fixedly installed on the top of the suspension frame (1), a telescopic device (4) is movably installed inside the adjusting device (3), a fixed top seat (5) is fixedly installed on the bottom of the vehicle frame (2), an annular connecting plate (6) is arranged near the middle of the outer surface of the fixed top seat (5), an air bag (7) is fixedly installed on the outer surface of the annular connecting plate (6), a shaft sleeve device (8) is movably installed inside the fixed top seat (5), the interior of the shaft sleeve device (8) is movably sleeved with the telescopic device (4), an air guide hole II (9) is opened at a position near the vehicle frame (2) on one side of the outer surface of the fixed top seat (5), and one end of the air guide hole II (9) is connected to the main air pump through the air guide pipe I; The regulating device (3) comprises a regulating air chamber (31), the interior of the regulating air chamber (31) cooperates with the telescopic device (4), a spring protection plate (32) is arranged on the top of the regulating air chamber (31), a connection hole (33) is provided at a position inside the spring protection plate (32) on the top of the regulating air chamber (31), the connection hole (33) is directly connected to the inner cavity of the regulating air chamber (31), an air guide hole I (34) is provided on one side of the outer surface of the regulating air chamber (31) near the suspension frame (1), the air guide hole I (34) is connected to the inner cavity of the regulating air chamber (31), and one end of the air guide hole I (34) is connected to the main air pump through the air guide pipe II; The outer surface of the spring protection plate (32) is fixedly connected to one end of the airbag (7), the connection between the airbag (7) and the annular connection plate (6) and the connection between the airbag (7) and the spring protection plate (32) are both sealed, and the material of the airbag (7) is a soft high-pressure resistant rubber material; The telescopic device (4) comprises a telescopic rod (41), a spring base (42) is provided at the bottom of the outer surface of the telescopic rod (41), a buffer spring I (43) and a buffer spring II (44) are fixedly installed on the top and bottom of the spring base (42), respectively, the top of the buffer spring I (43) is connected to the top of the inner cavity of the regulating air chamber (31), and the bottom of the buffer spring II (44) is connected to the bottom of the inner cavity of the regulating air chamber (31), a spring connecting plate (45) is provided at a position close to the middle and lower part of the outer surface of the telescopic rod (41), a buffer spring III (46) is fixedly installed at the bottom of the spring connecting plate (45), and the bottom of the buffer spring III (46) is connected to the top of the regulating air chamber (31), and the inner cavity of the telescopic rod (41) is close to the inner cavity of the telescopic rod (41). A stop plate (47) is fixedly installed at a position near the middle and slightly above the stop plate (47); a limit slide rail (48) is arranged at a position above the stop plate (47) in the inner cavity of the telescopic rod (41); the number of the limit slide rails (48) is four and they are distributed in a circular array; an air guide device (49) is movably installed in the inner cavity of the telescopic rod (41) in a manner that is located above the stop plate (47) and cooperates with the limit slide rail (48); a strip hole (401) is opened on the outer surface of the telescopic rod (41) at a position above the stop plate (47); the number of the strip holes (401) is four and they are distributed in a circular array; a pressure regulating spring (402) is fixedly installed on the top of the air guide device (49); the top of the pressure regulating spring (402) is connected to the shaft sleeve device (8).

2. The automobile suspension structure according to claim 1, characterized in that: The air guide device (49) comprises a travel block (491), the outer surface of the travel block (491) is provided with a slide groove (492), the number of the slide grooves (492) is four and they are distributed in a circular array, the slide grooves (492) cooperate with the limiting slide rail (48), the top of the travel block (491) is provided with an air inlet groove (493) at a central position, the inner wall of the air inlet groove (493) is provided with a flow hole I (494), the flow hole I (494) penetrates the travel block (491) and extends to the outer surface, and the penetration point is located at a position between the slide grooves (492).

3. The automobile suspension structure according to claim 2, characterized in that: The shaft sleeve device (8) comprises a lower shaft sleeve (81), the lower shaft sleeve (81) being movably sleeved inside the fixed top seat (5), an upper shaft sleeve (82) being fixedly mounted on the top of the lower shaft sleeve (81), a lower shaft hole (83) being provided inside the lower shaft sleeve (81), an upper shaft hole (84) being provided on the top of the upper shaft sleeve (82), the upper shaft hole (84) extending to a position communicating with the lower shaft hole (83), a flow hole II (85) being provided at the bottom of the inner cavity of the upper shaft hole (84), and the bottom of the flow hole II (85) being connected to the pressure regulating spring (402).

4. The automobile suspension structure according to claim 3, characterized in that: The flow hole I (494) is in a corresponding relationship with the strip hole (401) in terms of longitudinal position.

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