A variable stiffness independent suspension system for a passenger vehicle and a method of manufacturing the same

Abstract

The application provides a passenger car variable stiffness independent suspension system and a processing method thereof, which comprises a steering knuckle, a mounting mechanism is arranged on the top of one side of the steering knuckle, the mounting mechanism comprises a strut, a bottom mounting seat, a shock absorber and a top mounting seat, the bottom end of the strut is connected with the side surface of the steering knuckle, the top end of the strut is fixedly provided with the bottom mounting seat, the top surface of the bottom mounting seat is provided with the shock absorber in the middle, the top end of the shock absorber is provided with the top mounting seat, and the outer side of the shock absorber is provided with a shock absorbing spring for supporting the shock absorbing; S1, assembling the suspension; S2, mounting the shock absorbing spring; S3, fixing the shock absorbing spring; S4, mounting the adjusting mechanism; and S5, fixing the adjusting mechanism. Through the upper adjusting cylinder and the lower adjusting cylinder which are engaged and slide in the adjusting mechanism, and the air inlet pipe which is communicated with the air supply device on the top of the upper adjusting cylinder, the air pressure in the shock absorbing cavity can be changed, the stiffness of the independent suspension system during use is adjusted, and then the independent suspension system can assist the passenger car to adapt to more road conditions.

Description

Technical Field

[0001] This invention relates to the field of bus suspension technology, specifically to a variable stiffness independent suspension system for buses and its manufacturing method. Background Technology

[0002] The suspension system of a bus refers to a set of components and devices used to support and absorb the weight of the vehicle. Usually, the suspension system of a bus is a rigid bridge suspension system. This type of suspension system has the advantages of simple structure and good stability. However, when in use, the rigid bridge suspension system cannot provide good suspension travel and road adaptability.

[0003] Therefore, some buses are equipped with independent suspension systems, which offer better suspension performance and ride comfort compared to traditional rigid axle suspensions.

[0004] Independent suspension systems connect each wheel to the body individually, allowing each wheel to move independently, thus providing better suspension performance, ride comfort, and handling agility, resulting in a better driving experience for passengers and drivers.

[0005] However, the above-mentioned independent suspension system has been found to have the following problems during actual use:

[0006] 1. The support stiffness of an independent suspension system is usually fixed. Since buses have many driving scenarios and different road surfaces have different support requirements for the independent suspension system, a single stiffness independent suspension will not only fail to achieve the expected suspension effect, but will also increase the risk of damage to suspension system components.

[0007] 2. Buses are usually driven frequently. The springs used for shock absorption in the independent suspension system of buses will experience fatigue and deformation under high-frequency operation, which will reduce their performance in supporting and buffering the weight and vibration of the bus. They need to be repaired or replaced. However, when replacing the suspension springs in the independent suspension system, there are many parts in the independent suspension system, which not only increases the complexity of the maintenance process, but also consumes too much bus downtime and affects the normal operation of the bus.

[0008] In summary, there is a current need for an independent suspension system for buses that allows for adjustable support stiffness and facilitates maintenance, along with its manufacturing method. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a variable stiffness independent suspension system for buses and its manufacturing method, thus solving the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A variable stiffness independent suspension system for a bus includes a steering knuckle. A mounting mechanism is provided on the top of one side of the steering knuckle. The mounting mechanism includes a strut, a bottom mounting base, a shock absorber, and a top mounting base. The bottom end of the strut is connected to the side of the steering knuckle. The bottom mounting base is fixedly provided on the top of the strut. A shock absorber is provided in the middle of the top surface of the bottom mounting base. The top mounting base is provided on the top of the shock absorber. A shock absorber spring for supporting the shock absorption is provided on the outside of the shock absorber. An adjustment mechanism for changing the support force is provided between the top mounting base and the bottom mounting base.

[0012] The adjustment mechanism includes a first upper adjustment plate, a second upper adjustment plate, a first lower adjustment plate, and a second lower adjustment plate. The first upper adjustment plate, the second upper adjustment plate, the first lower adjustment plate, and the second lower adjustment plate are all arc-shaped structures. The first upper adjustment plate and the second upper adjustment plate are arranged opposite to each other, and the first lower adjustment plate and the second lower adjustment plate are arranged opposite to each other. The first upper adjustment plate and the second upper adjustment plate form an upper adjustment cylinder, and the first lower adjustment plate and the second lower adjustment plate form a lower adjustment cylinder. The outer bottom of the upper adjustment cylinder engages and slides with the inner top of the lower adjustment cylinder. The top of the upper adjustment cylinder is threadedly connected to the bottom of the top mounting base, and the bottom of the lower adjustment cylinder is threadedly connected to the top of the bottom mounting base.

[0013] The upper and lower adjusting cylinders form a damping cavity on their inner sides to improve the suspension's shock absorption and support effect. An air intake pipe communicating with the damping cavity is provided at the top of the upper adjusting cylinder.

[0014] Furthermore, a first sealing strip is provided at the edge where the first adjusting upper plate contacts the second adjusting upper plate, and a first sealing groove is provided at the edge where the second adjusting upper plate contacts the first adjusting upper plate, with the first sealing strip engaging with the first sealing groove.

[0015] A second sealing strip is provided at the edge where the first lower adjusting plate contacts the second lower adjusting plate, and a second sealing groove is provided at the edge where the second lower adjusting plate contacts the first lower adjusting plate. The second sealing strip and the second sealing groove are engaged and connected.

[0016] Furthermore, the first and second upper adjustment plates are provided with upper fixing components on their outer sides. The upper fixing components include a first upper clamping plate, a second upper clamping plate, and upper fixing strips. Both the first and second upper clamping plates are arc-shaped structures. Both the first and second upper clamping plates are located on the outer side of the upper adjustment cylinder. Both ends of the first and second upper clamping plates are provided with upper fixing strips, which are fixedly connected by bolts.

[0017] Furthermore, an upper clamping area is formed between the first upper clamping plate and the second upper clamping plate, and the upper clamping area is engaged with the upper adjusting cylinder.

[0018] Furthermore, the first and second lower adjusting plates are provided with a lower fixing assembly on their outer sides. The lower fixing assembly includes a first lower clamping plate, a second lower clamping plate, a lower fixing strip, and a sealing fixing strip. The first and second lower clamping plates are arranged opposite to each other and are both located on the outer side of the lower adjusting cylinder. Both ends of the first and second lower clamping plates are provided with lower fixing strips, which are fixedly connected by bolts.

[0019] Furthermore, a lower clamping area is formed between the first lower clamping plate and the second lower clamping plate, and the lower clamping area is engaged with the lower adjusting cylinder.

[0020] A sealing side groove is provided on the outer side of the lower adjusting cylinder. Sealing side strips are provided on the inner middle of the first lower clamping plate and the inner middle of the second lower clamping plate. The sealing side strips are engaged with the sealing side groove.

[0021] Furthermore, the shock-absorbing spring includes a spring body, a top mounting plate, a top mounting strip, a bottom mounting plate, and a bottom mounting strip. The spring body is located outside the shock absorber. The top of the spring body is provided with a top mounting plate, and the top surface of the top mounting plate is provided with a top mounting strip. The bottom of the spring body is provided with a bottom mounting plate, and the bottom surface of the bottom mounting plate is provided with a bottom mounting strip.

[0022] Furthermore, the shock-absorbing springs are provided in two sets, with the top and bottom ends of the shock-absorbing springs connected and fixed to the bottom mounting base and the top mounting base through the mounting components. The spring body is a bent arc structure, and the spring bodies in the two sets of shock-absorbing springs are distributed relatively.

[0023] Furthermore, the assembly component includes a bottom fixing ring and a top fixing ring. The top fixing ring is located on the bottom surface of the top mounting base, and the bottom fixing ring is located on the top surface of the bottom mounting base. The bottom surface of the top mounting ring has a top mounting groove, which is threadedly connected to the top mounting strip. The top surface of the bottom mounting ring has a bottom mounting groove, which is threadedly connected to the bottom mounting strip.

[0024] A method for manufacturing a variable stiffness independent suspension system for a passenger vehicle, the method comprising the following steps:

[0025] S1. Assemble the suspension:

[0026] First, connect and fix the steering knuckle to the bottom of the strut. Then, process and assemble the bottom mounting bracket, shock absorber, and top mounting bracket on the top of the strut in sequence by welding or other methods. After the assembly is completed, wait for the remaining parts to be processed and assembled.

[0027] S2. Install shock-absorbing springs:

[0028] Place two sets of damping springs between the top mounting base and the bottom mounting base, and attach the two sets of damping springs to the outside of the damper in a mirror image.

[0029] S3, Fixed shock-absorbing spring:

[0030] The two sets of damping springs are fixed together with the top mounting base and the bottom mounting base using mounting components;

[0031] S4. Install the adjustment mechanism:

[0032] Assemble the first upper adjustment plate, the second upper adjustment plate, the first lower adjustment plate, and the second lower adjustment plate in the adjustment mechanism to form an upper adjustment cylinder and a lower adjustment cylinder, and place the upper adjustment cylinder and the lower adjustment cylinder between the top mounting base and the bottom mounting base;

[0033] S5, Fixed Adjustment Mechanism:

[0034] The upper and lower adjusting cylinders are fixed to the outside of the upper and lower adjusting cylinders by the upper and lower fixing components, so that the upper and lower adjusting cylinders are fixedly assembled between the top mounting base and the bottom mounting base.

[0035] This invention provides a variable stiffness independent suspension system for passenger vehicles and its manufacturing method. Compared with the prior art, it has the following advantages:

[0036] By adjusting the upper and lower adjusting cylinders that engage and slide in the adjusting mechanism, and with the air intake pipe connected to the air supply device at the top of the upper adjusting cylinder, the air pressure in the damping chamber can be changed, thereby adjusting the stiffness of the independent suspension system during use, and thus making it easier for the independent suspension system to assist the bus in adapting to more road conditions.

[0037] The curved structure of the relatively distributed spring bodies allows the two sets of shock absorber springs to work together to support and dampen the suspension system. This also facilitates the maintenance and replacement of the shock absorber springs from the side of the shock absorber, making the maintenance and replacement of the shock absorber springs in this independent suspension system more convenient. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the structure of a bus variable stiffness independent suspension system according to the present invention is shown;

[0040] Figure 2 A structural schematic diagram of the overall side cross-section of the present invention is shown;

[0041] Figure 3 A schematic diagram of the installation of the adjustment component of the present invention is shown;

[0042] Figure 4 A schematic diagram of the structure of the damping cavity of the present invention is shown;

[0043] Figure 5 A schematic diagram of the structure of the adjustment component of the present invention is shown;

[0044] Figure 6 A schematic diagram of the upper fixing component and the lower fixing component of the present invention is shown;

[0045] Figure 7 A schematic diagram of the structure of the shock-absorbing spring of the present invention is shown;

[0046] Figure 8 A schematic diagram of the installation of the shock-absorbing spring of the present invention is shown;

[0047] Figure 9 A schematic flowchart of the processing method of the present invention is shown;

[0048] The diagram shows: 1. Steering knuckle; 2. Mounting mechanism; 21. Strut; 22. Bottom mounting base; 23. Shock absorber; 24. Top mounting base; 3. Adjustment mechanism; 31. First upper adjustment plate; 311. First sealing strip; 32. Second upper adjustment plate; 321. First sealing groove; 33. First lower adjustment plate; 331. Second sealing strip; 34. Second lower adjustment plate; 341. Second sealing groove; 35. Intake pipe; 36. Shock absorber cavity; 37. Sealing side groove; 4. Assembly assembly. Components; 41. Bottom fixing ring; 42. Top fixing ring; 43. Bottom mounting groove; 44. Top mounting groove; 5. Shock-absorbing spring; 51. Spring body; 52. Top mounting plate; 53. Top mounting strip; 54. Bottom mounting plate; 55. Bottom mounting strip; 6. Lower fixing assembly; 61. First lower clamping plate; 62. Second lower clamping plate; 63. Lower fixing strip; 64. Sealing fixing strip; 7. Upper fixing assembly; 71. First upper clamping plate; 72. Second upper clamping plate; 73. Upper fixing strip. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] To address the technical problems in the background section, a variable stiffness independent suspension system for passenger vehicles and its manufacturing method are presented below:

[0052] Combination Figures 1-9As shown, the present invention provides a variable stiffness independent suspension system for a passenger vehicle and its processing method, comprising a steering knuckle 1, a mounting mechanism 2 on the top of one side of the steering knuckle 1, the mounting mechanism 2 including a strut 21, a bottom mounting base 22, a shock absorber 23, and a top mounting base 24, the bottom end of the strut 21 being connected to the side of the steering knuckle 1, the bottom mounting base 22 being fixedly mounted on the top end of the strut 21, the shock absorber 23 being provided in the middle of the top surface of the bottom mounting base 22, the top mounting base 24 being provided on the top end of the shock absorber 23, and a shock-absorbing spring 5 for supporting the shock absorption being provided on the outside of the shock absorber 23, the top mounting base 24 being connected to the bottom mounting base 22. An adjustment mechanism 3 is provided to protect against changes in support force. The adjustment mechanism 3 includes a first upper adjustment plate 31, a second upper adjustment plate 32, a first lower adjustment plate 33, and a second lower adjustment plate 34. All three plates are arc-shaped. The first upper adjustment plate 31 and the second upper adjustment plate 32 are positioned opposite each other, as are the first lower adjustment plate 33 and the second lower adjustment plate 34. The first upper adjustment plate 31 and the second upper adjustment plate 32 form an upper adjustment cylinder, and the first lower adjustment plate 33 and the second lower adjustment plate 34 form an upper adjustment cylinder. 34 forms a lower adjusting cylinder, with the outer bottom of the upper adjusting cylinder engaging and sliding with the inner top of the lower adjusting cylinder. The top of the upper adjusting cylinder is threadedly connected to the bottom of the top mounting base 24, and the bottom of the lower adjusting cylinder is threadedly connected to the top of the bottom mounting base 22. The threaded connection between the upper adjusting cylinder and the bottom of the top mounting base 24, and the threaded connection between the lower adjusting cylinder and the bottom mounting base 22, facilitates the movement of the upper and lower adjusting cylinders together with the top and bottom mounting bases 24 and 22 after they are fixed between them. Simultaneously, the first adjusting plate forming the upper and lower adjusting cylinders... 31. The relative arrangement of the second upper adjustment plate 32, the first lower adjustment plate 33, and the second lower adjustment plate 34 makes it easier to separate the first upper adjustment plate 31, the second upper adjustment plate 32, the first lower adjustment plate 33, and the second lower adjustment plate 34 from the top mounting seat 24 and the bottom mounting seat 22; by engaging and sliding the outer bottom of the upper adjustment cylinder with the inner top of the lower adjustment cylinder, when the upper and lower adjustment cylinders move with the top mounting seat 24 and the bottom mounting seat 22, the upper and lower adjustment cylinders can provide support and buffer for the suspension system through the internal shock absorption cavity 36;

[0053] The upper and lower adjusting cylinders form a damping cavity 36 on their inner sides to improve the suspension's shock absorption and support effect. The top of the upper adjusting cylinder is provided with an air inlet pipe 35 that communicates with the damping cavity 36. Through the air inlet pipe 35 provided at the top of the upper adjusting cylinder, it can be connected to an air supply device (such as an air pump) to inject air into the damping cavity 36 formed between the upper and lower adjusting cylinders, thereby changing the air pressure in the damping cavity 36 and achieving the purpose of changing the stiffness of the suspension system.

[0054] In this embodiment, a first sealing strip 311 is provided at the edge where the first adjusting upper plate 31 contacts the second adjusting upper plate 32, and a first sealing groove 321 is provided at the edge where the second adjusting upper plate 32 contacts the first adjusting upper plate 31. The first sealing strip 311 is engaged with the first sealing groove 321. The first sealing groove 321 and the first sealing strip 311 at the connecting edge of the first adjusting upper plate 31 and the second adjusting upper plate 32 facilitate the improvement of the sealing performance of the upper adjusting cylinder formed by the first adjusting upper plate 31 and the second adjusting upper plate 32.

[0055] A second sealing strip 331 is provided at the edge where the first lower adjusting plate 33 contacts the second lower adjusting plate 34, and a second sealing groove 341 is provided at the edge where the second lower adjusting plate 34 contacts the first lower adjusting plate 33. The second sealing strip 331 is engaged with the second sealing groove 341. The second sealing groove 341 and the second sealing strip 331 at the connecting edge of the first lower adjusting plate 33 and the second lower adjusting plate 34 facilitate the improvement of the sealing performance of the lower adjusting cylinder formed by the first upper adjusting plate 31 and the second upper adjusting plate 32.

[0056] By adjusting the upper and lower adjusting cylinders in the adjusting mechanism 3, and with the air intake pipe 35 connected to the air supply device at the top of the upper adjusting cylinder, the air pressure in the damping chamber 36 can be changed, thereby adjusting the stiffness of the independent suspension system during use, and thus making it easier for the independent suspension system to assist the bus in adapting to more road conditions.

[0057] Example 2

[0058] like Figures 1-8 As shown, based on the above embodiments, this embodiment further provides the following:

[0059] To facilitate the assembly and disassembly of the upper and lower adjusting cylinders via the top mounting base 24 and the bottom mounting base 22, this embodiment provides the following design:

[0060] An upper fixing assembly 7 is provided on the outer side of the first adjusting upper plate 31 and the second adjusting upper plate 32. The upper fixing assembly 7 includes a first upper clamping plate 71, a second upper clamping plate 72, and an upper fixing strip 73. Both the first upper clamping plate 71 and the second upper clamping plate 72 are arc-shaped structures. The first upper clamping plate 71 and the second upper clamping plate 72 are both located on the outer side of the upper adjusting cylinder. Both ends of the first upper clamping plate 71 and the second upper clamping plate 72 are provided with upper fixing strips 73, and the upper fixing strips 73 are fixedly connected by bolts. The arc-shaped structure with the first upper clamping plate 71 and the second upper clamping plate 72 facilitates the clamping and fixing of the upper adjusting cylinder formed by the first adjusting upper plate 31 and the second adjusting upper plate 32 by the first upper clamping plate 71 and the second upper clamping plate 72. The setting of the upper fixing strip 73 facilitates the fixing of the first upper clamping plate 71 and the second upper clamping plate 72 by bolt combination.

[0061] In this embodiment, an upper clamping area is formed between the first upper clamping plate 71 and the second upper clamping plate 72, and the upper clamping area is engaged with the upper adjusting cylinder; through the clamping area formed between the first upper clamping plate 71 and the second upper clamping plate 72, the upper adjusting cylinder can be fixed from the outside, which facilitates the improvement of the structural strength of the upper adjusting cylinder.

[0062] In this embodiment, a lower fixing assembly 6 is provided on the outer side of the first lower adjusting plate 33 and the second lower adjusting plate 34. The lower fixing assembly 6 includes a first lower clamping plate 61, a second lower clamping plate 62, a lower fixing strip 63, and a sealing fixing strip 64. The first lower clamping plate 61 and the second lower clamping plate 62 are arranged opposite to each other and are both located on the outer side of the lower adjusting cylinder. Both ends of the first lower clamping plate 61 and the second lower clamping plate 62 are provided with lower fixing strips 63, and the lower fixing strips 63 are fixedly connected by bolts. Through the first lower clamping plate 61 and the second lower clamping plate 62 provided in the lower fixing assembly 6, the lower adjusting cylinder can be clamped and fixed from the outside of the lower adjusting cylinder under the bolt fixation of the lower fixing strips 63.

[0063] In this embodiment, a lower clamping area is formed between the first lower clamping plate 61 and the second lower clamping plate 62, and the lower clamping area is engaged with the lower adjusting cylinder; the lower clamping area formed between the first lower clamping plate 61 and the second lower clamping plate can clamp and fix the lower adjusting cylinder, thereby improving the stability of the lower adjusting cylinder during operation.

[0064] A sealing side groove 37 is provided on the outer side of the lower adjusting cylinder. Sealing side strips are provided on the inner middle of the first lower clamping plate 61 and the inner middle of the second lower clamping plate 62. The sealing side strips are engaged with the sealing side groove 37. The engagement connection between the sealing side groove 37 and the sealing side strip can improve the sealing performance of the lower adjusting cylinder when the lower fixing assembly 6 fixes the lower adjusting cylinder.

[0065] Example 3

[0066] like Figures 1-8 As shown, based on the above embodiments, this embodiment further provides the following:

[0067] To facilitate the maintenance and replacement of the shock-absorbing spring 5, the following technical solution is provided in this embodiment:

[0068] The shock-absorbing spring 5 includes a spring body 51, a top mounting plate 52, a top mounting strip 53, a bottom mounting plate 54, and a bottom mounting strip 55. The spring body 51 is located outside the shock absorber 23. The top of the spring body 51 is provided with a top mounting plate 52, and the top surface of the top mounting plate 52 is provided with a top mounting strip 53. The bottom of the spring body 51 is provided with a bottom mounting plate 54, and the bottom surface of the bottom mounting plate 54 is provided with a bottom mounting strip 55. The top mounting strip 53 and the bottom mounting strip 55 provided at both ends of the spring body 51 facilitate the assembly and fixation of the spring body 51 with the top mounting base 24 and the bottom mounting base 22 through the assembly assembly 4.

[0069] In this embodiment, two sets of shock absorber springs 5 ​​are mirror-image arranged. The top and bottom ends of the shock absorber springs 5 ​​are connected and fixed to the bottom mounting base 22 and the top mounting base 24 through the mounting components. The spring body 51 has a bent arc structure. The spring bodies 51 in the two sets of shock absorber springs 5 ​​are distributed opposite to each other. Through the bent arc structure of the relatively distributed spring bodies 51, the two sets of shock absorber springs 5 ​​can cooperate with each other to support and absorb shocks in the suspension system. At the same time, it is convenient to repair and replace the shock absorber springs 5 ​​from the side of the shock absorber 23 in the future, thus making the repair and replacement of the shock absorber springs 5 ​​in the independent suspension system more convenient.

[0070] In this embodiment, the assembly component 4 includes a bottom fixing ring 41 and a top fixing ring 42. The top fixing ring 42 is disposed on the bottom surface of the top mounting base 24, and the bottom fixing ring 41 is disposed on the top surface of the bottom mounting base 22. A top mounting groove 44 is formed on the bottom surface of the top mounting ring, and the top mounting groove 44 is threadedly connected to the top mounting strip 53. A bottom mounting groove 43 is formed on the top surface of the bottom mounting ring, and the bottom mounting groove 43 is threadedly connected to the bottom mounting strip 55. Through the threaded connection between the bottom mounting groove 43 and the bottom mounting strip 55, and the threaded connection between the top mounting groove 44 and the top mounting strip 53, the connection and fixation of the shock-absorbing spring 5 to the top mounting base 24 and the bottom mounting base 22 are more convenient.

[0071] Example 3

[0072] like Figures 1-9 As shown, based on the above embodiments, this embodiment further provides the following:

[0073] A method for manufacturing a variable stiffness independent suspension system for a passenger vehicle, the method comprising the following steps:

[0074] S1. Assemble the suspension:

[0075] First, connect and fix the steering knuckle 1 to the bottom of the strut 21. Then, process and assemble the bottom mounting base 22, shock absorber 23 and top mounting base 24 on the top of the strut 21 by welding and other methods. After the assembly is completed, wait for the remaining parts to be processed and assembled.

[0076] S2. Install shock-absorbing spring 5:

[0077] Place two sets of damping springs 5 ​​between the top mounting base 24 and the bottom mounting base 22, and attach the two sets of damping springs 5 ​​to the outside of the damper 23 in a mirror image.

[0078] S3, Fixed shock-absorbing spring 5:

[0079] The two sets of damping springs 5 ​​are fixed together with the top mounting base 24 and the bottom mounting base 22 by the mounting assembly;

[0080] S4. Install adjustment mechanism 3:

[0081] The first upper adjustment plate 31, the second upper adjustment plate 32, the first lower adjustment plate 33 and the second lower adjustment plate 34 in the adjustment mechanism 3 are assembled into an upper adjustment cylinder and a lower adjustment cylinder, and the upper adjustment cylinder and the lower adjustment cylinder are placed between the top mounting base 24 and the bottom mounting base 22.

[0082] S5, Fixed Adjustment Mechanism 3:

[0083] The upper and lower adjusting cylinders are fixed to the outside of the upper and lower adjusting cylinders by the upper fixing component 7 and the lower fixing component 6, so that the upper and lower adjusting cylinders are fixedly assembled between the top mounting base 24 and the bottom mounting base 22.

[0084] Working principle and usage process of this invention:

[0085] When in use, the independent suspension system is installed at the bottom of the bus, and the air intake pipe 35 is connected to the air supply device. When the bus is in motion, the air supply device sends air into the damping cavity 36 formed by the upper and lower adjusting cylinders in the adjusting assembly. Under the locking and sliding action of the upper and lower adjusting cylinders, the upper and lower adjusting cylinders can support and damp the independent suspension system through the damping cavity 36 in conjunction with the damping spring 5 and the damping cavity 36.

[0086] When the road conditions change, the air supply device changes the air pressure in the damping chamber 36. After the air pressure in the damping chamber 36 changes, the support force provided by the damping chamber 36 between the upper and lower adjusting cylinders will change. In this way, the stiffness of the independent suspension system can be changed, making it easier for the independent suspension system to assist the bus in adapting to more road conditions.

[0087] When the damping effect of the shock absorber spring 5 decreases after long-term use of the independent suspension system, the upper fixing component 7 and the lower fixing component 6 outside the upper and lower adjusting cylinders are removed. The upper and lower adjusting cylinders are separated from the top mounting seat 24 and the bottom mounting seat 22. At this time, by rotating the shock absorber spring 5, the top mounting strip 53 and the bottom mounting strip 55 at both ends of the spring body 51 will separate from the threaded top mounting ring and the bottom mounting ring. At this time, the shock absorber spring 5 can be removed from the outside of the shock absorber 23 for replacement with fewer parts, which improves the maintenance convenience of the independent suspension system.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable stiffness independent suspension system for a passenger vehicle, characterized in that: The steering knuckle includes a mounting mechanism on the top of one side of the steering knuckle. The mounting mechanism includes a strut, a bottom mounting base, a shock absorber, and a top mounting base. The bottom end of the strut is connected to the side of the steering knuckle, and the bottom mounting base is fixedly mounted on the top of the strut. The shock absorber is located in the middle of the top surface of the bottom mounting base, and the top mounting base is located on the top of the shock absorber. A shock absorber spring for supporting the shock absorption is located on the outside of the shock absorber. An adjustment mechanism for protecting and changing the support force is provided between the top mounting base and the bottom mounting base. The adjustment mechanism includes a first upper adjustment plate, a second upper adjustment plate, a first lower adjustment plate, and a second lower adjustment plate. The first upper adjustment plate, the second upper adjustment plate, the first lower adjustment plate, and the second lower adjustment plate are all arc-shaped structures. The first upper adjustment plate and the second upper adjustment plate are arranged opposite to each other, and the first lower adjustment plate and the second lower adjustment plate are arranged opposite to each other. The first upper adjustment plate and the second upper adjustment plate form an upper adjustment cylinder, and the first lower adjustment plate and the second lower adjustment plate form a lower adjustment cylinder. The outer bottom of the upper adjustment cylinder engages and slides with the inner top of the lower adjustment cylinder. The top of the upper adjustment cylinder is threadedly connected to the bottom of the top mounting base, and the bottom of the lower adjustment cylinder is threadedly connected to the top of the bottom mounting base. The upper and lower adjusting cylinders form a damping cavity on their inner sides to improve the suspension's shock absorption and support effect. An air intake pipe communicating with the damping cavity is provided at the top of the upper adjusting cylinder. The shock-absorbing spring includes a spring body, a top mounting plate, a top mounting strip, a bottom mounting plate, and a bottom mounting strip. The spring body is located outside the shock absorber. The top of the spring body is provided with a top mounting plate, and the top surface of the top mounting plate is provided with a top mounting strip. The bottom of the spring body is provided with a bottom mounting plate, and the bottom surface of the bottom mounting plate is provided with a bottom mounting strip. The shock-absorbing springs are provided in two sets. The top and bottom ends of the shock-absorbing springs are connected and fixed to the bottom mounting base and the top mounting base through the mounting components. The spring body is a bent arc structure. The spring bodies in the two sets of shock-absorbing springs are distributed opposite to each other.

2. The variable stiffness independent suspension system for passenger vehicles according to claim 1, characterized in that: A first sealing strip is provided at the edge where the first adjusting upper plate contacts the second adjusting upper plate, and a first sealing groove is provided at the edge where the second adjusting upper plate contacts the first adjusting upper plate. The first sealing strip is engaged with the first sealing groove. A second sealing strip is provided at the edge where the first lower adjusting plate contacts the second lower adjusting plate, and a second sealing groove is provided at the edge where the second lower adjusting plate contacts the first lower adjusting plate. The second sealing strip and the second sealing groove are engaged and connected.

3. The variable stiffness independent suspension system for a passenger vehicle according to claim 2, characterized in that: The first and second upper adjustment plates are provided with upper fixing components on their outer sides. The upper fixing components include a first upper clamping plate, a second upper clamping plate, and upper fixing strips. Both the first and second upper clamping plates are arc-shaped structures. Both the first and second upper clamping plates are located on the outer side of the upper adjustment cylinder. Both ends of the first and second upper clamping plates are provided with upper fixing strips, which are fixedly connected by bolts.

4. A variable stiffness independent suspension system for a passenger vehicle according to claim 3, characterized in that: An upper clamping area is formed between the first upper clamping plate and the second upper clamping plate, and the upper clamping area is engaged with the upper adjusting cylinder.

5. A variable stiffness independent suspension system for a passenger vehicle according to claim 4, characterized in that: The first and second lower adjustment plates are provided with a lower fixing assembly on their outer sides. The lower fixing assembly includes a first lower clamping plate, a second lower clamping plate, a lower fixing strip, and a sealing fixing strip. The first and second lower clamping plates are arranged opposite to each other and are both located on the outer side of the lower adjustment cylinder. Both ends of the first and second lower clamping plates are provided with lower fixing strips, which are fixedly connected by bolts.

6. A variable stiffness independent suspension system for a passenger vehicle according to claim 5, characterized in that: A lower clamping area is formed between the first lower clamping plate and the second lower clamping plate, and the lower clamping area is engaged with the lower adjusting cylinder; A sealing side groove is provided on the outer side of the lower adjusting cylinder. Sealing side strips are provided on the inner middle of the first lower clamping plate and the inner middle of the second lower clamping plate. The sealing side strips are engaged with the sealing side groove.

7. A variable stiffness independent suspension system for a passenger vehicle according to claim 6, characterized in that: It also includes an assembly component, which includes a bottom fixing ring and a top fixing ring. The top fixing ring is located on the bottom surface of the top mounting base, and the bottom fixing ring is located on the top surface of the bottom mounting base. The bottom surface of the top mounting ring has a top mounting groove that is threadedly connected to the top mounting strip. The top surface of the bottom mounting ring has a bottom mounting groove that is threadedly connected to the bottom mounting strip.

8. The processing method of a bus variable stiffness independent suspension system according to claim 7, characterized in that: The processing method includes the following steps: S1. Assemble the suspension: First, connect and fix the steering knuckle to the bottom of the strut. Then, weld the bottom mounting bracket, shock absorber, and top mounting bracket onto the top of the strut. After assembly, wait for the remaining parts to be processed and assembled. S2. Install shock-absorbing springs: Place two sets of damping springs between the top mounting base and the bottom mounting base, and attach the two sets of damping springs to the outside of the damper in a mirror image. S3, Fixed shock-absorbing spring: The two sets of damping springs are fixed together with the top and bottom mounting brackets using mounting components; S4. Install the adjustment mechanism: Assemble the first upper adjustment plate, the second upper adjustment plate, the first lower adjustment plate, and the second lower adjustment plate in the adjustment mechanism to form an upper adjustment cylinder and a lower adjustment cylinder, and place the upper adjustment cylinder and the lower adjustment cylinder between the top mounting base and the bottom mounting base; S5, Fixed Adjustment Mechanism: The upper and lower adjusting cylinders are fixed to the outside of the upper and lower adjusting cylinders by the upper and lower fixing components, so that the upper and lower adjusting cylinders are fixedly assembled between the top mounting base and the bottom mounting base.

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