A truck cab suspension system with autonomous adjustment damping function

Abstract

The application discloses a truck cab suspension system with self-adjusting damping function, which comprises a suspension, a front suspension assembly, a polarization stabilizer, a hydraulic push rod, a rear suspension assembly and a cab base, wherein the suspension is fixedly connected with the front suspension assembly, the front suspension assembly is fixedly connected with the cab base, the polarization stabilizer is fixedly connected with the suspension, the hydraulic push rod is fixedly connected with the polarization stabilizer, the hydraulic push rod is hingedly connected with the cab base, the rear suspension assembly is fixedly connected with the suspension, the rear suspension assembly is located on the side of the polarization stabilizer away from the front suspension assembly, and the rear suspension assembly is in transmission connection with the cab base. The full-floating suspension structure is adopted, so that the damping effect is better, the self-adjusting hydraulic damping can automatically adjust the damping size according to the vibration condition during the truck driving, so that the damping effect is better, the self-adjusting hydraulic damping is a pure mechanical structure, the cost is lower, the self-adjusting hydraulic damping is not easy to be damaged, is convenient to maintain and is high in stability.

Description

Technical Field

[0001] This invention relates to the field of heavy vehicle suspension technology, specifically a truck cab suspension system with autonomous adjustable vibration reduction function. Background Technology

[0002] With the development of the transportation industry, truck transportation has become an indispensable part of the transportation industry. As the number of trucks increases, the comfort and balance of driving also need to be improved to ensure comfort and safety during driving. Existing cab suspension systems are divided into two types: semi-floating and fully floating. Due to cost limitations, the more comfortable and stable fully floating suspension system is difficult to use on a large scale.

[0003] The key factor limiting the vibration reduction effect of truck suspension systems is the choice of damping components. The damping components commonly used in truck suspension systems on the market are mostly hydraulic damping and spring damping. Since the vibration of trucks varies during driving, automatic adjustment of damping often requires feedback from electronic control components to the on-board computer for calculation and electronic control adjustment, which increases costs and prevents the widespread use of fully floating suspensions. Summary of the Invention

[0004] The purpose of this invention is to provide a truck cab suspension system with autonomous adjustable vibration reduction function to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A truck cab suspension system with autonomous adjustment and vibration reduction function includes a suspension, a front suspension assembly, a polarization stabilizer, a hydraulic push rod, a rear suspension assembly, and a cab base. The suspension is fixedly connected to the front suspension assembly, the front suspension assembly is fixedly connected to the cab base, the polarization stabilizer is fixedly connected to the suspension, the hydraulic push rod is fixedly connected to the polarization stabilizer, the hydraulic push rod is hinged to the cab base, the rear suspension assembly is fixedly connected to the suspension, the rear suspension assembly is located on the side of the polarization stabilizer away from the front suspension assembly, and the rear suspension assembly is drivenly connected to the cab base.

[0006] This suspension system is a fully floating suspension. The front suspension assembly is fixed to the front end of the suspension, and the rear suspension assembly is fixed to the side of the suspension away from the front suspension assembly. The cab base is fixedly connected to the front suspension assembly and is in contact with the rear suspension assembly. When the truck encounters rough roads during driving, the front and rear suspension assemblies adjust their damping according to the vibration conditions to jointly counteract the bumps caused by wheel vibration. The polarization stabilizer counteracts horizontal vibration. During truck maintenance, the cab base is pushed and flipped by a hydraulic push rod, and the front suspension assembly fixes the cab base.

[0007] Furthermore, the front suspension assembly includes a connecting frame, a tilting mounting base, a hinge shaft, a first stabilizer bar, a spring damper, a first connecting rod, a second connecting rod, a first connecting base, and a self-adjusting hydraulic damper. The connecting frame is fixedly connected to the suspension, the connecting frame is fixedly connected to the hinge shaft, the hinge shaft is hinged to the tilting mounting base, the tilting mounting base is fixedly connected to the cab base, the first stabilizer bar is rotatably connected to the connecting frame, the spring damper is rotatably connected to the first stabilizer bar, the spring damper is rotatably connected to the first connecting rod, the first connecting rod is rotatably connected to the first connecting base, the self-adjusting hydraulic damper is rotatably connected to the first stabilizer bar, the self-adjusting hydraulic damper is rotatably connected to the second connecting rod, and the second connecting rod is rotatably connected to the first connecting base.

[0008] The first connecting seat connects to the truck wheel. When the truck vibrates, the first connecting seat moves up and down, transmitting the vibration from the wheel to the self-adjusting hydraulic damper via the second connecting rod. The self-adjusting hydraulic damper adjusts its damping according to the vibration, converting the upward kinetic energy of the first connecting seat into its own internal energy to counteract the vibration. When the first connecting seat rises, the spring damper is compressed by the first connecting seat. While the self-adjusting hydraulic damper absorbs the kinetic energy of the first connecting seat, the spring damper also absorbs a portion of the kinetic energy of the first connecting seat. After the self-adjusting hydraulic damper absorbs and counteracts the vibration, the spring damper returns to its original position, releasing kinetic energy and causing the first connecting seat to reset. The tilting fixing seat is hinged to the connecting frame via a hinge shaft. When the truck cab needs to be tilted, the hinge shaft serves as the tilting center.

[0009] Furthermore, the self-adjusting hydraulic damping includes an upper lifting ring, a first piston rod, a first variable-resistance hydraulic chamber, and a lower lifting ring. The upper lifting ring is rotatably connected to the first connecting rod, the upper lifting ring is fixedly connected to the first piston rod, the first piston rod is slidably connected to the first variable-resistance hydraulic chamber, the first variable-resistance hydraulic chamber is fixedly connected to the lower lifting ring, and the lower lifting ring is rotatably connected to the second connecting rod.

[0010] The first connecting seat moves upward, causing the second connecting rod to move upward. The upper lifting ring is rotatably connected to the first connecting rod. The first piston rod is slidably connected to the first variable resistance hydraulic chamber. The second connecting rod pushes the first variable resistance hydraulic chamber upward. The first variable resistance hydraulic chamber counteracts the vibration, and the first piston rod remains stationary.

[0011] Furthermore, the first variable resistance hydraulic chamber includes an upper outer shell, an upper hydraulic cavity, a first working piston, a first floating piston, a lower outer shell, a second working piston, a second floating piston, a limiting buckle, and a limiting spring. The upper outer shell is slidably connected to the first piston rod, the upper outer shell is slidably connected to the upper hydraulic cavity, the upper hydraulic cavity is slidably connected to the first piston rod, the first working piston is fixedly connected to the first piston rod, the first working piston is slidably connected to the upper hydraulic cavity, the first floating piston is slidably connected to the upper hydraulic cavity, the upper hydraulic cavity is slidably connected to the lower outer shell, the upper hydraulic cavity is fixedly connected to the second working piston, the second working piston is slidably connected to the lower outer shell, the second floating piston is slidably connected to the lower outer shell, the limiting buckle is fixedly connected to the upper hydraulic cavity, and the limiting spring is fixedly connected to the lower outer shell.

[0012] When the vibration amplitude is small, the limit latch does not break through the limit spring, the second connecting rod pushes the first variable resistance hydraulic chamber upward, the upper hydraulic chamber remains stationary, the lower outer shell moves upward, the second working piston and the second floating piston compress to counteract the vibration, and the first piston rod remains stationary; when the vibration amplitude is too large, the limit latch breaks through the limit spring, the second connecting rod pushes the first variable resistance hydraulic chamber upward, the lower outer shell moves upward, the upper hydraulic chamber moves upward, the second working piston and the second floating piston compress to counteract the vibration, and at the same time the first working piston and the first floating piston compress to counteract the vibration.

[0013] Furthermore, the first floating piston divides the upper hydraulic chamber into two chambers. The upper chamber of the upper hydraulic chamber is filled with hydraulic oil, and the lower chamber of the upper hydraulic chamber is filled with gas. The first working piston divides the upper chamber of the upper hydraulic chamber into two spaces, and the hydraulic oil in the two spaces of the upper chamber of the upper hydraulic chamber is connected through the first working piston. The upper hydraulic chamber is sealed with the lower outer shell to form the lower hydraulic chamber. The second floating piston divides the lower hydraulic chamber into two chambers. The upper chamber of the lower hydraulic chamber is filled with hydraulic oil, and the lower chamber of the lower chamber is filled with gas. The second working piston divides the upper chamber of the lower hydraulic chamber into two spaces, and the hydraulic oil in the two spaces of the upper chamber of the lower hydraulic chamber is connected through the second working piston.

[0014] When the vibration amplitude is small, the limit latch does not break through the limit spring, the lower outer shell moves upward, and the hydraulic oil in the upper chamber of the lower hydraulic chamber flows into the lower chamber through the second working piston. As the lower outer shell moves upward, the hydraulic oil compresses the second floating piston, compressing the gas in the chamber and absorbing energy to offset the vibration. When the vibration amplitude is too large, the limit latch breaks through the limit spring, and the lower outer shell moves upward. At the same time, the upper hydraulic chamber moves upward, and the hydraulic oil in the upper chamber of the upper hydraulic chamber flows into the lower chamber through the first working piston. As the upper hydraulic chamber moves upward, the hydraulic oil compresses the first floating piston, compressing the gas in the chamber and absorbing energy to offset the vibration.

[0015] Furthermore, the polarization stabilizer includes a second stabilizer bar, a spring seat, a polarization spring, and a second connecting seat. The second stabilizer bar is fixedly connected to the suspension, the spring seat is fixedly connected to the second stabilizer bar, the polarization spring is fixedly connected to the spring seat, the polarization spring is fixedly connected to the suspension, and the second connecting seat is rotatably connected to the second stabilizer bar.

[0016] The polarizing spring connects the suspension and the spring seat to counteract horizontal vibrations; the second connecting seat is driven to the second stabilizer bar and fixedly connected to the hydraulic push rod. When the truck cab needs to be tilted, the hydraulic push rod pushes the cab to tilt.

[0017] Furthermore, the rear suspension assembly includes a suspension bridge, a connecting bridge, a mounting base, a rear axle damper, and a compression spring plate. The suspension bridge is fixedly connected to the suspension frame, the connecting bridge is fixedly connected to the suspension bridge, the suspension bridge is drivenly connected to the cab base, the mounting base is fixedly connected to the suspension bridge, the rear axle damper is fixedly connected to the mounting base, the rear axle damper is fixedly connected to the compression spring plate, and the compression spring plate is drivenly connected to the connecting bridge.

[0018] The truck's vibration is transmitted to the rear axle damper through the suspension bridge. The rear axle damper converts part of the vibration's kinetic energy into its own internal energy to cancel the vibration, while the remaining part is absorbed by the compression spring plate. After the rear axle damper cancels out part of the vibration, the compression spring plate returns to its original state, releasing the absorbed kinetic energy and keeping the connecting bridge stable.

[0019] Furthermore, the rear axle damping includes a second piston rod and a second variable-resistance hydraulic chamber. The second piston rod is fixedly connected to the compression spring plate and slidably connected to the second variable-resistance hydraulic chamber. The second variable-resistance hydraulic chamber is fixedly connected to the mounting base and has the same structure as the first variable-resistance hydraulic chamber.

[0020] The second variable-resistance hydraulic chamber moves upward, and the internal hydraulic oil compresses the gas in the chamber, absorbing kinetic energy and converting it into internal energy, thus reducing the upward movement amplitude of the second piston rod.

[0021] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention adopts a fully floating suspension structure with a four-point contact between the suspension and the cab, which can ensure better vibration reduction. The self-adjusting hydraulic damping, through a graded design, can automatically adjust the damping magnitude according to the vibration during truck operation to achieve better vibration reduction. This self-adjusting hydraulic damping is a purely mechanical structure, which is low in cost, not easily damaged, easy to maintain, and highly stable. It can achieve the effect of self-adjusting damping without the need for electronic control, and can play a better role in extreme and harsh environments. This invention is equipped with a polarization stabilizer, which can counteract horizontal vibrations caused by strong airflow and oncoming high-speed vehicles, maximizing the optimization of the cab's comfort and balance. The hydraulic push rod and the front suspension assembly can provide thrust, support, and a tilting center when the cab needs to be tilted for maintenance, facilitating the tilting of the cab for maintenance of the suspension system. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the front suspension assembly structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the self-adjusting hydraulic damping structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the first variable resistance hydraulic chamber structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the polarization stabilizer structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the rear suspension assembly structure of the present invention;

[0029] In the diagram: 1. Suspension; 2. Front suspension assembly; 21. Connecting frame; 22. Tilting mounting base; 23. Hinge shaft; 24. First stabilizer bar; 25. Spring damper; 26. First connecting rod; 27. Second connecting rod; 28. First connecting seat; 29. ​​Self-adjusting hydraulic damper; 291. Upper eyelet; 292. First piston rod; 293. First variable resistance hydraulic chamber; 2931. Upper outer shell; 2932. Upper hydraulic cavity; 2933. First working piston; 2934. First floating piston; 2935. Lower outer shell; 2936. Second working piston; 2937. Second floating piston; 2938. Limiting buckle; 2939. Limiting spring; 294. Lower suspension ring; 3. Polarization stabilizer; 31. Second stabilizer bar; 32. Spring seat; 33. Polarization spring; 34. Second connecting seat; 4. Hydraulic push rod; 5. Rear suspension assembly; 51. Suspension bridge; 52. Connecting bridge; 53. Mounting seat; 54. Rear axle damper; 541. Second piston rod; 542. Second variable resistance hydraulic chamber; 55. Compression spring plate; 6. Cab base. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0031] The present invention provides the following technical solution:

[0032] like Figure 1As shown, the suspension system includes a suspension 1, a front suspension assembly 2, a polarization stabilizer 3, a hydraulic push rod 4, a rear suspension assembly 5, and a cab base 6. The suspension 1 is fixedly connected to the front suspension assembly 2, the front suspension assembly 2 is fixedly connected to the cab base 6, the polarization stabilizer 3 is fixedly connected to the suspension 1, the hydraulic push rod 4 is fixedly connected to the polarization stabilizer 3, the hydraulic push rod 4 is hinged to the cab base 6, the rear suspension assembly 5 is fixedly connected to the suspension 1, the rear suspension assembly 5 is located on the side of the polarization stabilizer 3 away from the front suspension assembly 2, and the rear suspension assembly 5 is drive-connected to the cab base 6.

[0033] This suspension system is a fully floating suspension. The front suspension assembly 2 is fixed to the front end of the suspension 1, and the rear suspension assembly 5 is fixed to the side of the suspension 1 away from the front suspension assembly 2. The cab base 6 is fixedly connected to the front suspension assembly 2 and to the rear suspension assembly 5. When the truck encounters rough roads during driving, the front suspension assembly 2 and the rear suspension assembly 5 adjust their damping according to the vibration conditions to jointly counteract the bumps caused by wheel vibration. The polarization stabilizer 3 counteracts horizontal vibration. During truck maintenance, the cab base 6 is pushed and flipped by the hydraulic push rod 4, and the front suspension assembly 2 fixes the cab base 6.

[0034] like Figure 2 As shown, the front suspension assembly 2 includes a connecting frame 21, a tilting mounting base 22, a hinge shaft 23, a first stabilizer bar 24, a spring damper 25, a first connecting rod 26, a second connecting rod 27, a first connecting seat 28, and a self-adjusting hydraulic damper 29. The connecting frame 21 is fixedly connected to the suspension 1, the connecting frame 21 is fixedly connected to the hinge shaft 23, the hinge shaft 23 is hinged to the tilting mounting base 22, the tilting mounting base 22 is fixedly connected to the cab base 6, the first stabilizer bar 24 is rotatably connected to the connecting frame 21, the spring damper 25 is rotatably connected to the first stabilizer bar 24, the spring damper 25 is rotatably connected to the first connecting rod 26, the first connecting rod 26 is rotatably connected to the first connecting seat 28, the self-adjusting hydraulic damper 29 is rotatably connected to the first stabilizer bar 24, the self-adjusting hydraulic damper 29 is rotatably connected to the second connecting rod 27, and the second connecting rod 27 is rotatably connected to the first connecting seat 28.

[0035] The first connecting seat 28 connects to the truck wheel. When the truck vibrates, the first connecting seat 28 moves up and down, transmitting the vibration from the wheel to the self-adjusting hydraulic damper 29 via the second connecting rod 27. The self-adjusting hydraulic damper 29 adjusts its damping according to the vibration, converting the upward kinetic energy of the first connecting seat 28 into its own internal energy to counteract the vibration. When the first connecting seat 28 rises, the spring damper 25 is compressed by the first connecting seat 28. When the self-adjusting hydraulic damper 29 absorbs the kinetic energy of the first connecting seat 28, the spring damper 25 also absorbs a portion of the kinetic energy of the first connecting seat 28. After the self-adjusting hydraulic damper 29 absorbs and counteracts the vibration, the spring damper 25 recovers and releases its kinetic energy, causing the first connecting seat 28 to return to its original position. The flipping fixing seat 22 is hinged to the connecting frame 21 via the hinge shaft 23. When the truck cab needs to be flipped, the hinge shaft 23 serves as the flipping center.

[0036] like Figure 3 As shown, the self-adjusting hydraulic damping 29 includes an upper lifting ring 291, a first piston rod 292, a first variable resistance hydraulic chamber 293, and a lower lifting ring 294. The upper lifting ring 291 is rotatably connected to the first connecting rod 26, and the upper lifting ring 291 is fixedly connected to the first piston rod 292. The first piston rod 292 is slidably connected to the first variable resistance hydraulic chamber 293, and the first variable resistance hydraulic chamber 293 is fixedly connected to the lower lifting ring 294. The lower lifting ring 294 is rotatably connected to the second connecting rod 27.

[0037] The first connecting seat 28 moves upward, causing the second connecting rod 27 to move upward. The upper hanging ring 291 is rotatably connected to the first connecting rod 26. The first piston rod 292 is slidably connected to the first variable resistance hydraulic chamber 293. The second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward. The first variable resistance hydraulic chamber 293 counteracts the vibration, and the first piston rod 292 remains stationary.

[0038] like Figure 4As shown, the first variable-resistance hydraulic chamber 293 includes an upper outer shell 2931, an upper hydraulic cavity 2932, a first working piston 2933, a first floating piston 2934, a lower outer shell 2935, a second working piston 2936, a second floating piston 2937, a limiting buckle 2938, and a limiting spring 2939. The upper outer shell 2931 is slidably connected to the first piston rod 292, and the upper outer shell 2931 is slidably connected to the upper hydraulic cavity 2932. The upper hydraulic cavity 2932 is slidably connected to the first piston rod 292. The first working piston 2933 is fixedly connected to the first piston rod 292. The upper hydraulic chamber 2932 is slidably connected to the first working piston 2933, the upper hydraulic chamber 2934 is slidably connected to the upper hydraulic chamber 2932, the upper hydraulic chamber 2932 is slidably connected to the lower outer shell 2935, the upper hydraulic chamber 2932 is fixedly connected to the second working piston 2936, the second working piston 2936 is slidably connected to the lower outer shell 2935, the second floating piston 2937 is slidably connected to the lower outer shell 2935, the limiting buckle 2938 is fixedly connected to the upper hydraulic chamber 2932, and the limiting spring 2939 is fixedly connected to the lower outer shell 2935.

[0039] When the vibration amplitude is small, the limiting latch 2938 does not break through the limiting spring 2939, the second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward, the upper hydraulic chamber 2932 remains stationary, the lower outer shell 2935 moves upward, the second working piston 2936 and the second floating piston 2937 compress to counteract the vibration, and the first piston rod 292 remains stationary; when the vibration amplitude is too large, the limiting latch 2938 breaks through the limiting spring 2939, the second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward, the lower outer shell 2935 moves upward, the upper hydraulic chamber 2932 moves upward, the second working piston 2936 and the second floating piston 2937 compress to counteract the vibration, and at the same time the first working piston 2933 and the first floating piston 2934 compress to counteract the vibration.

[0040] like Figure 4 As shown, the first floating piston 2934 divides the upper hydraulic chamber 2932 into two chambers. The upper chamber of the upper hydraulic chamber 2932 is filled with hydraulic oil, and the lower chamber of the upper hydraulic chamber 2932 is filled with gas. The first working piston 2933 divides the upper chamber of the upper hydraulic chamber 2932 into two spaces. The hydraulic oil in the two spaces of the upper chamber of the upper hydraulic chamber 2932 is connected through the first working piston 2933. The upper hydraulic chamber 2932 is sealed with the lower outer shell 2935 to form the lower hydraulic chamber. The second floating piston 2937 divides the lower hydraulic chamber into two chambers. The upper chamber of the lower hydraulic chamber is filled with hydraulic oil, and the lower chamber of the lower chamber is filled with gas. The second working piston 2936 divides the upper chamber of the lower hydraulic chamber into two spaces. The hydraulic oil in the two spaces of the upper chamber of the lower hydraulic chamber is connected through the second working piston 2936.

[0041] When the vibration amplitude is small, the limit latch 2938 does not break through the limit spring 2939, the lower outer shell 2935 moves upward, and the hydraulic oil in the upper chamber of the lower hydraulic chamber flows into the lower chamber through the second working piston 2936. As the lower outer shell 2935 moves upward, the hydraulic oil compresses the second floating piston 2937, compressing the gas in the chamber and absorbing energy to offset the vibration. When the vibration amplitude is too large, the limit latch 2938 breaks through the limit spring 2939, and at the same time as the lower outer shell 2935 moves upward, the upper hydraulic chamber 2932 moves upward. The hydraulic oil in the upper chamber of the upper hydraulic chamber 2932 flows into the lower chamber through the first working piston 2933. As the upper hydraulic chamber 2932 moves upward, the hydraulic oil compresses the first floating piston 2934, compressing the gas in the chamber and absorbing energy to offset the vibration.

[0042] like Figure 5 As shown, the polarization stabilizer 3 includes a second stabilizer rod 31, a spring seat 32, a polarization spring 33, and a second connecting seat 34. The second stabilizer rod 31 is fixedly connected to the suspension 1, the spring seat 32 is fixedly connected to the second stabilizer rod 31, the polarization spring 33 is fixedly connected to the spring seat 32, the polarization spring 33 is fixedly connected to the suspension 1, and the second connecting seat 34 is rotatably connected to the second stabilizer rod 31.

[0043] The polarizing spring 33 connects the suspension 1 and the spring seat 32 to counteract horizontal vibrations; the second connecting seat 34 is connected to the second stabilizer bar 31 and is fixedly connected to the hydraulic push rod 4. When the truck cab needs to be tilted, the hydraulic push rod 4 pushes the cab to tilt.

[0044] like Figure 6 As shown, the rear suspension assembly 5 includes a suspension bridge 51, a connecting bridge 52, a mounting base 53, a rear axle damper 54, and a compression spring plate 55. The suspension bridge 51 is fixedly connected to the suspension 1, the connecting bridge 52 is fixedly connected to the suspension bridge 51, the suspension bridge 51 is drivenly connected to the cab base 6, the mounting base 53 is fixedly connected to the suspension bridge 51, the rear axle damper 54 is fixedly connected to the mounting base 53, the rear axle damper 54 is fixedly connected to the compression spring plate 55, and the compression spring plate 55 is drivenly connected to the connecting bridge 52.

[0045] The truck vibration is transmitted to the rear axle damper 54 through the suspension bridge 51. The rear axle damper 54 converts part of the kinetic energy of the vibration into its own internal energy to cancel the vibration. The remaining part is absorbed by the compression spring plate 55. After the rear axle damper 54 cancels part of the vibration, the compression spring plate 55 returns to its original state, releases the absorbed kinetic energy, and keeps the connecting bridge 52 stable.

[0046] like Figure 6As shown, the rear axle damper 54 includes a second piston rod 541 and a second variable resistance hydraulic chamber 542. The second piston rod 541 is fixedly connected to the compression spring plate 55, and the second piston rod 541 is slidably connected to the second variable resistance hydraulic chamber 542. The second variable resistance hydraulic chamber 542 is fixedly connected to the mounting base 53. The second variable resistance hydraulic chamber 542 has the same structure as the first variable resistance hydraulic chamber 293.

[0047] The second variable resistance hydraulic chamber 542 moves upward, and the internal hydraulic oil compresses the gas in the chamber, absorbing kinetic energy and converting it into internal energy, thereby reducing the upward movement amplitude of the second piston rod 541.

[0048] The working principle of this invention: This suspension system is a fully floating suspension. The front suspension assembly 2 is fixed to the front end of the suspension 1, and the rear suspension assembly 5 is fixed to the side of the suspension 1 away from the front suspension assembly 2. The cab base 6 is fixedly connected to the front suspension assembly 2 and to the rear suspension assembly 5. When the truck encounters a rough road surface during driving, the truck vibrates, and the first connecting seat 28 moves up and down. The upward movement of the first connecting seat 28 drives the second connecting rod 27 upward. The upper hanging ring 291 is rotatably connected to the first connecting rod 26. The first piston rod 292 is slidably connected to the first variable resistance hydraulic chamber 293. The second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward. When the vibration amplitude is not large, the limit buckle 2938 does not break through the limit spring 2939. The second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward, the upper hydraulic chamber 2932 remains stationary, and the lower outer shell 2935 moves upward. Hydraulic oil in the upper chamber of the upper and lower hydraulic chambers flows into the lower chamber through the second working piston 2936. As the lower outer shell 2935 moves upward, the hydraulic oil compresses the second floating piston 2937, compressing the gas in the chamber and absorbing energy to counteract vibration. The first piston rod 292 remains stationary. When the vibration amplitude is too large, the limit latch 2938 breaks through the limit spring 2939, and the second connecting rod 27 pushes the first variable resistance hydraulic chamber 293 upward. At the same time as the lower outer shell 2935 moves upward, the upper hydraulic chamber 2932 moves upward. The second working piston 2936 and the second floating piston 2937 compress to counteract vibration. As the upper hydraulic chamber 2932 moves upward, the hydraulic oil in the upper chamber of the upper hydraulic chamber 2932 flows into the lower chamber through the first working piston 2933. As the upper hydraulic chamber 2932 moves upward, the hydraulic oil compresses the first floating piston 2934, compressing the gas in the chamber and absorbing energy to counteract vibration. When the first connecting seat 28 rises, the spring damper 25 is compressed by the first connecting seat 28. When the self-adjusting hydraulic damper 29 absorbs the kinetic energy of the first connecting seat 28, the spring damper 25 also absorbs a portion of the kinetic energy of the first connecting seat 28. After the self-adjusting hydraulic damper 29 absorbs and cancels the vibration, the spring damper 25 restores and releases its kinetic energy, causing the first connecting seat 28 to reset. The vibration is transmitted to the rear axle damper 54 through the suspension bridge 51. The rear axle damper 54 converts part of the kinetic energy of the vibration into its own internal energy to cancel the vibration, and the remaining part is compressed and absorbed by the compression spring plate 55. 4. After partially offsetting the vibration, the compressed spring plate 55 returns to its original state, releasing the absorbed kinetic energy and keeping the connecting bridge 52 stable. The polarizing spring 33 connects the suspension 1 and the spring seat 32 to offset the horizontal vibration. During truck maintenance, the second connecting seat 34 is connected to the second stabilizer bar 31 and is fixedly connected to the hydraulic push rod 4. When the truck cab needs to be tilted, the hydraulic push rod 4 pushes the cab to tilt. The tilting fixing seat 22 is hinged to the connecting frame 21 through the hinge shaft 23. When the truck cab needs to be tilted, the hinge shaft 23 serves as the tilting center.

[0049] 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 process, method, article, or apparatus.

[0050] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A truck cab suspension system with self-adjusting vibration damping function, characterized in that: The suspension system includes a suspension (1), a front suspension assembly (2), a polarization stabilizer (3), a hydraulic push rod (4), a rear suspension assembly (5), and a cab base (6). The suspension (1) is fixedly connected to the front suspension assembly (2), the front suspension assembly (2) is fixedly connected to the cab base (6), the polarization stabilizer (3) is fixedly connected to the suspension (1), the hydraulic push rod (4) is fixedly connected to the polarization stabilizer (3), the hydraulic push rod (4) is hinged to the cab base (6), the rear suspension assembly (5) is fixedly connected to the suspension (1), the rear suspension assembly (5) is located on the side of the polarization stabilizer (3) away from the front suspension assembly (2), and the rear suspension assembly (5) is drivenly connected to the cab base (6). The front suspension assembly (2) includes a first connecting rod (26), a second connecting rod (27), and a self-adjusting hydraulic damper (29); The self-adjusting hydraulic damping (29) includes an upper lifting ring (291), a first piston rod (292), a first variable resistance hydraulic chamber (293), and a lower lifting ring (294). The upper lifting ring (291) is rotatably connected to the first connecting rod (26), the upper lifting ring (291) is fixedly connected to the first piston rod (292), the first piston rod (292) is slidably connected to the first variable resistance hydraulic chamber (293), the first variable resistance hydraulic chamber (293) is fixedly connected to the lower lifting ring (294), and the lower lifting ring (294) is rotatably connected to the second connecting rod (27). The first variable resistance hydraulic chamber (293) includes an upper outer shell (2931), an upper hydraulic cavity (2932), a first working piston (2933), a first floating piston (2934), a lower outer shell (2935), a second working piston (2936), a second floating piston (2937), a limiting buckle (2938), and a limiting spring (2939). The upper outer shell (2931) is slidably connected to the first piston rod (292), the upper outer shell (2931) is slidably connected to the upper hydraulic cavity (2932), the upper hydraulic cavity (2932) is slidably connected to the first piston rod (292), and the first working piston (2933) is fixedly connected to the first piston rod (292). Then, the first working piston (2933) is slidably connected to the upper hydraulic chamber (2932), the first floating piston (2934) is slidably connected to the upper hydraulic chamber (2932), the upper hydraulic chamber (2932) is slidably connected to the lower outer shell (2935), the upper hydraulic chamber (2932) is fixedly connected to the second working piston (2936), the second working piston (2936) is slidably connected to the lower outer shell (2935), the second floating piston (2937) is slidably connected to the lower outer shell (2935), the limiting buckle (2938) is fixedly connected to the upper hydraulic chamber (2932), and the limiting spring (2939) is fixedly connected to the lower outer shell (2935). The first floating piston (2934) divides the upper hydraulic chamber (2932) into two chambers. The upper chamber of the upper hydraulic chamber (2932) is filled with hydraulic oil, and the lower chamber of the upper hydraulic chamber (2932) is filled with gas. The first working piston (2933) divides the upper chamber of the upper hydraulic chamber (2932) into two spaces. The hydraulic oil in the two spaces of the upper chamber of the upper hydraulic chamber (2932) is connected through the first working piston (2933). The upper hydraulic chamber (2932) is sealed with the lower outer shell (2935) to form the lower hydraulic chamber. The second floating piston (2937) divides the lower hydraulic chamber into two chambers. The upper chamber of the lower hydraulic chamber is filled with hydraulic oil, and the lower chamber of the lower chamber is filled with gas. The second working piston (2936) divides the upper chamber of the lower hydraulic chamber into two spaces. The hydraulic oil in the two spaces of the upper chamber of the lower hydraulic chamber is connected through the second working piston (2936).

2. The truck cab suspension system with self-adjusting vibration damping function according to claim 1, characterized in that: The front suspension assembly (2) further includes a connecting frame (21), a tilting mounting base (22), a hinge shaft (23), a first stabilizer bar (24), a spring damper (25), and a first connecting seat (28). The connecting frame (21) is fixedly connected to the suspension (1), the connecting frame (21) is fixedly connected to the hinge shaft (23), the hinge shaft (23) is hinged to the tilting mounting base (22), the tilting mounting base (22) is fixedly connected to the cab base (6), and the first stabilizer bar (24) is fixedly connected to the cab base (6). The spring damper (25) is rotatably connected to the connecting frame (21), the spring damper (25) is rotatably connected to the first stabilizer (24), the spring damper (25) is rotatably connected to the first connecting rod (26), the first connecting rod (26) is rotatably connected to the first connecting seat (28), the self-adjusting hydraulic damper (29) is rotatably connected to the first stabilizer (24), the self-adjusting hydraulic damper (29) is rotatably connected to the second connecting rod (27), and the second connecting rod (27) is rotatably connected to the first connecting seat (28).

3. A truck cab suspension system with self-adjusting vibration damping function according to claim 1, characterized in that: The polarization stabilizer (3) includes a second stabilizer rod (31), a spring seat (32), a polarization spring (33), and a second connecting seat (34). The second stabilizer rod (31) is fixedly connected to the suspension (1). The spring seat (32) is fixedly connected to the second stabilizer rod (31). The polarization spring (33) is fixedly connected to the spring seat (32) and the suspension (1). The second connecting seat (34) is rotatably connected to the second stabilizer rod (31) and is fixedly connected to the hydraulic push rod (4).

4. A truck cab suspension system with self-adjusting vibration damping function according to claim 1, characterized in that: The rear suspension assembly (5) includes a suspension bridge (51), a connecting bridge (52), a mounting base (53), a rear axle damper (54), and a compression spring plate (55). The suspension bridge (51) is fixedly connected to the suspension (1), the connecting bridge (52) is fixedly connected to the suspension bridge (51), the suspension bridge (51) is drivenly connected to the cab base (6), the mounting base (53) is fixedly connected to the suspension bridge (51), the rear axle damper (54) is fixedly connected to the mounting base (53), the rear axle damper (54) is fixedly connected to the compression spring plate (55), and the compression spring plate (55) is drivenly connected to the connecting bridge (52).

5. A truck cab suspension system with self-adjusting vibration damping function according to claim 4, characterized in that: The rear axle damper (54) includes a second piston rod (541) and a second variable resistance hydraulic chamber (542). The second piston rod (541) is fixedly connected to the compression spring plate (55), and the second piston rod (541) is slidably connected to the second variable resistance hydraulic chamber (542). The second variable resistance hydraulic chamber (542) is fixedly connected to the mounting base (53). The second variable resistance hydraulic chamber (542) has the same structure as the first variable resistance hydraulic chamber (293).

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