Balanced suspension system

Abstract

A balanced suspension system belongs to the technical field of vehicle suspensions and comprises a balance beam, two ends of the balance beam are fixedly connected with two adjacent axles through a damper respectively, a balance beam support is hinged to the middle of the balance beam through a balance shaft assembly, the balance beam support is fixedly mounted on a frame, the balance shaft assembly comprises a balance shaft, and the balance shaft is hinged to the balance beam support. The balance shaft is inserted and fixed in the two oppositely arranged balance shaft end cover supports, the two balance shaft end cover supports are connected through a center bolt, the center bolt penetrates through the interior of the balance shaft, the balance shaft end cover supports are rotationally connected with the balance beam through conical rubber bearings, the balance shaft end cover supports are fixedly connected with the balance beam support, and the balance beam support is fixedly connected with the balance shaft. The shaft sleeve is matched with the conical rubber bearing to position the balance shaft end cover support, the balance shaft can be kept stable in the operation process, impact on the balance shaft can be reduced, force from the road surface can be evenly transmitted to the balance shaft end cover support, and therefore the risk of structural fatigue and damage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle suspension technology, and in particular to a balanced suspension system. Background Technology

[0002] In articulated suspensions, the balance beam can maintain vehicle balance and effectively distribute the load on the wheels, prevent wheel overload, increase vehicle stability, help coordinate the movement between the axles, reduce the amplitude of vehicle tilt or sway during cornering, and improve the handling stability of dump trucks in complex environments.

[0003] The existing balance suspension system consists of a balance beam and a balance shaft (as disclosed in CN107215159A). The balance beam is symmetrically arranged on both sides of the vehicle frame. The middle position of the balance beam is hinged to the U-shaped frame on the vehicle frame through the balance shaft. A rubber shock absorber is fixed to the bottom surface of each end of the balance beam. Each rubber shock absorber is fixed to the axle diaphragm, ensuring that the middle axle and the rear axle have good contact with the ground under complex road conditions, mitigating and attenuating vertical impacts to the ground, and improving the vehicle's power and passability.

[0004] In existing balance suspension systems, the balance shaft is directly connected to the balance beam via bearings. When the vehicle is traveling on complex road conditions, the impact load is directly transmitted to the balance beam through the balance shaft. The balance beam is susceptible to large instantaneous impact forces, which seriously affects the ride smoothness and driving comfort of the vehicle. In addition, the connection stability between the balance shaft and the U-shaped frame is poor, and the balance shaft is prone to displacement or loosening during vehicle operation. Furthermore, the existing balance beam structure has poor overall bending and torsional resistance, making it extremely easy to be damaged when subjected to loads in various directions. Utility Model Content

[0005] To address the technical problems of existing balance suspension systems, such as the balance shaft being directly connected to the balance beam via bearings, resulting in poor buffering performance, the balance beam being susceptible to large instantaneous impact forces, severely affecting vehicle smoothness and ride comfort, and the poor stability of the connection between the balance shaft and the U-shaped frame on the vehicle frame, this utility model provides a balance suspension system.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a balanced suspension system, including a balance beam. Each end of the balance beam is fixedly connected to two adjacent axles via a shock absorber. A balance beam bracket is hinged to the middle of the balance beam via a balance shaft assembly. The balance beam bracket is fixedly mounted on the vehicle frame using a three-point fixing method, enabling convenient assembly and disassembly during maintenance and replacement, greatly improving maintenance efficiency. With the combined action of tapered rubber bearings and shock absorbers at both ends, the balance beam achieves better shock absorption and stability. The tapered rubber bearings provide a certain degree of flexible support, absorbing longitudinal and lateral vibrations from the beam, reducing vibrations caused by loads or external impacts, and preventing excessive displacement or stress in the beam. The shock absorbers at both ends are mainly responsible for reducing end-effector movement of the beam, especially under unbalanced loads or external disturbances, ensuring the balance of the beam.

[0008] The balance shaft assembly includes a balance shaft, which is inserted and fixed in two oppositely arranged balance shaft end cap brackets. The two balance shaft end cap brackets are connected by a central bolt, which passes through the inside of the balance shaft. The balance shaft end cap bracket is rotatably connected to the balance beam through a tapered rubber bearing. The balance shaft end cap bracket is fixedly connected to the balance beam bracket. A bushing, in conjunction with a tapered rubber bearing, positions the balance shaft end cap bracket. The balance shaft is fitted in the middle of the balance shaft end cap bracket, which can keep the balance shaft stable during operation and reduce the impact on the balance shaft. Through the bushing, the force from the road surface can be evenly transmitted to the balance shaft end cap bracket, thereby reducing the risk of structural fatigue and damage.

[0009] Preferably, the balance shaft end cover bracket is rotatably mounted in the bushing via a tapered rubber bearing. The bushing provides precise positioning for the installation of the balance shaft end cover bracket, while protecting the mounting area of ​​the balance beam, reducing wear, and further improving the stability of the rotatable connection.

[0010] Preferably, the balance shaft end cover bracket includes a mounting and fixing part with several bolt holes. A support part is fixedly mounted on one end face of the mounting and fixing part. The support part is a hollow conical structure. The interior of the support part has stepped channels for mounting the balance shaft. A tapered rubber bearing is mounted on the exterior of the support part. The hollow conical structure of the support part helps to save materials and reduce the overall weight. The stepped channels inside the support part have low requirements for the machining accuracy of the hole diameter, which facilitates the improvement of the installation positioning accuracy and stability of the balance shaft. The exterior of the support part has a first connecting surface for mounting the tapered rubber bearing, which facilitates the absorption and buffering of vibrations and impacts generated during vehicle operation by the tapered rubber bearing. The balance shaft end cover bracket assists the balance shaft in transmitting force, which improves the smoothness and driving comfort of the vehicle, while avoiding direct contact between the balance shaft and the balance beam, effectively protecting the balance shaft and increasing its service life.

[0011] Preferably, the stepped channel includes a coaxial first shaft mounting hole and a second shaft mounting hole. The first shaft mounting hole is located at the open end of the support and has a circular hole structure. The second shaft mounting hole has a tapered hole structure, and the diameter of the second shaft mounting hole gradually decreases towards the mounting and fixing part. The circular hole structure of the first shaft mounting hole facilitates the insertion and initial positioning of one end of the balance shaft. The tapered hole structure of the second shaft mounting hole is adapted to the shape of the balance shaft, which can better hold and position the balance shaft, ensuring the accuracy and stability of the balance shaft installation and making the balance shaft less prone to shaking during operation.

[0012] Preferably, the diameter of the first shaft mounting hole is the same as the maximum diameter of the second shaft mounting hole, which ensures that the balance shaft can pass smoothly through the two shaft mounting holes during installation, avoiding installation difficulties caused by diameter differences. It also facilitates the transition and positioning of the balance shaft during installation, improving installation efficiency.

[0013] Preferably, there is a gap between the two balance shaft end cap supports, which can effectively avoid direct contact and friction between the two balance shaft end cap supports, thereby reducing wear and extending service life. At the same time, the gap allows the two balance shaft end cap supports to have sufficient freedom when under force, avoiding mutual interference and deformation.

[0014] Preferably, the balance beam is V-shaped, which can better disperse the bending stress generated during vehicle operation. The V-shaped structure can also provide higher structural stability, prevent excessive deformation under vertical and lateral forces, and maintain the overall stiffness of the balance beam. The balance beam has a box-shaped cross-section, which can provide good bending and torsional resistance. It can not only increase strength and stiffness, but also effectively disperse stress and help to withstand loads in all directions.

[0015] Preferably, the balance beam includes a top plate and a bottom plate, which are fixedly connected by a blocking plate and an outer vertical plate. The bottom plate has a V-shaped bent plate structure, and both ends of the bottom plate have horizontal sections that are connected to the shock absorbers. The bushings are fixedly installed on the outer vertical plate, which makes the balance beam structure more stable, the connection between the components is tight, and it is easy to connect with the shock absorbers. The bushings are reasonably positioned, which is conducive to the installation and operation of the balance shaft assembly.

[0016] Preferably, the balance beam is internally fixed with several reinforcing plates, which are connected to the bushings. The reinforcing plates further enhance the strength of the balance beam, especially near the bushings, thereby improving the reliability of the balance beam under complex loads and extending its service life.

[0017] Preferably, limit pads are detachably installed at both ends of the horizontal section of the base plate. The limit pads are located on the outer side of the outer vertical plate, and the edges of the limit pads extend outward from the base plate. This is used to prevent excessive impact from damaging the balance beam structure when the balance beam swings. A limit seat is provided at a corresponding position on the frame. Under extreme working conditions, it will protect the balance beam to avoid direct impact on the balance beam and effectively improve the service life of the balance beam.

[0018] As can be seen from the above technical solutions, the advantages of this utility model are:

[0019] 1. The three-point fixing method improves maintenance efficiency. With the combined action of the tapered rubber bearing and the shock absorbers at both ends, the balance beam can achieve better shock absorption and stability. The tapered rubber bearing provides flexible support. The bushing cooperates with the tapered rubber bearing to position the balance shaft end cover bracket. The balance shaft is sleeved in the middle of the balance shaft end cover bracket, which can keep the balance shaft stable during operation and reduce the impact on the balance shaft. The bushing can evenly transmit the force from the road surface to the balance shaft end cover bracket, thereby reducing the risk of structural fatigue and damage.

[0020] 2. With the combined action of tapered rubber bearings and shock absorbers at both ends, the balance beam can achieve better vibration reduction and stability. The tapered rubber bearings provide a certain degree of flexible support, which can absorb longitudinal and lateral vibrations from the beam, reduce vibrations caused by loads or external impacts, and prevent excessive displacement or stress in the beam. The shock absorbers at both ends are mainly responsible for reducing the end movement of the beam, especially under unbalanced loads or external disturbances, to ensure the balance of the beam.

[0021] 3. The balance shaft is positioned by the relatively set balance shaft end cap bracket, which effectively improves the installation accuracy and stability of the balance shaft. The support part has stepped channels for installing the balance shaft. The stepped channels have low requirements for the machining accuracy of the hole diameter. The support part is externally connected with tapered rubber bearings, which can absorb and buffer the vibration and impact generated during vehicle operation. The balance shaft end cap bracket assists the balance shaft in transmitting force. While improving the smoothness and driving comfort of the vehicle, it also avoids direct contact between the balance shaft and the balance beam, effectively protecting the balance shaft and increasing its service life.

[0022] 4. The balance beam is V-shaped, which can better disperse the bending stress generated during vehicle operation. The V-shaped structure can also provide higher structural stability, prevent excessive deformation under vertical and lateral forces, and maintain the overall stiffness of the balance beam. The balance beam has a box-shaped cross-section, which can provide good bending and torsional resistance. It can not only increase strength and stiffness, but also effectively disperse stress and help to bear loads in all directions. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the connection between the balance beam and the balance shaft assembly according to one or more embodiments of the present invention (the front outer plate of the balance beam is not shown).

[0025] Figure 2 This is a cross-sectional structural diagram of the connection between the balance beam, balance shaft assembly, and balance beam support according to one or more embodiments of the present invention.

[0026] Figure 3 This is a top view schematic diagram of the connection between the balance beam, balance shaft assembly, and balance beam support according to one or more embodiments of the present invention.

[0027] Figure 4 This is a three-dimensional structural diagram of the balance shaft end cap bracket according to one or more embodiments of the present invention. Figure 1 ;

[0028] Figure 5 This is a three-dimensional structural diagram of the balance shaft end cap bracket according to one or more embodiments of the present invention. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the usage state of the balance suspension system according to one or more embodiments of the present invention (the vehicle frame and balance beam bracket are not shown).

[0030] The components represented by the various reference numerals in the diagram are:

[0031] 1. Balance beam; 2. Axle; 3. Shock absorber; 4. Balance shaft assembly; 5. Balance beam bracket; 6. Top plate; 7. Bottom plate; 8. Outer panel; 9. Blocking plate; 10. Lifting lug; 11. Limiting pad; 12. First reinforcing plate; 13. Bushing; 14. Second reinforcing plate; 15. Mounting and fixing part; 16. Reinforcing rib; 17. First bolt hole; 18. Second bolt hole; 19. Third bolt hole; 20. Support part; 21. First shaft mounting hole; 22. Second shaft mounting hole; 23. First connecting surface; 24. Second connecting surface; 25. Mounting groove; 26. Threaded plate stop; 27. Balance shaft; 28. Self-locking nut; 29. ​​Center bolt; 30. Tapered rubber bearing. Detailed Implementation

[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0033] In a typical embodiment of this utility model, such as Figures 1-6 As shown, a balanced suspension system is proposed, including: a balance beam 1, a shock absorber 3, a balance shaft assembly 4, and a balance beam bracket 5. The balance beam bracket 5 is fixedly installed on the vehicle frame by welding or other methods for connecting the balance beam 1 to the vehicle frame. Both ends of the balance beam 1 are fixedly connected to the axles 2 (such as the middle axle and rear axle) at both ends via a shock absorber 3. The middle position of the balance beam 1 is hinged to the balance beam bracket 5 via the balance shaft assembly 4. The balance shaft assembly includes two balance shaft end cap brackets, a balance shaft 27, and a tapered rubber bearing 30. The two balance shaft end cap brackets are arranged opposite each other, and the two balance shaft end cap brackets are sleeved on the outside of the balance shaft 27. The balance shaft end cover bracket and the balance shaft 13 are fitted together. The two balance shaft end cover brackets are connected by a center bolt 29. The center bolt 29 passes through the inside of the balance shaft 27. One end of the center bolt 29 is threaded to the self-locking nut 28, and the other end of the center bolt 29 is threaded to the threaded plate stop 26. The balance shaft 27 is limited and fixed by the cooperation of the balance shaft end cover bracket and the center bolt 29. A tapered rubber bearing 30 is installed on each balance shaft end cover bracket. The tapered rubber bearing 30 is rotatably connected to the balance beam 1. The balance shaft end cover bracket is fixedly connected to the balance beam bracket 5 on the frame by fixing bolts.

[0034] The axle 2 is connected to the frame by a three-point fixing method, which means that the balance beam 1 can be fixed through the middle balance beam bracket 5 and the shock absorbers 3 at both ends. This makes the installation and removal convenient during maintenance and replacement, and greatly improves maintenance efficiency.

[0035] With the combined action of the tapered rubber bearings 30 and the shock absorbers 3 at both ends, the balance beam 1 can achieve better vibration reduction and stability. The tapered rubber bearings 30 provide a certain degree of flexible support, which can absorb longitudinal and lateral vibrations from the beam, reduce vibrations caused by loads or external impacts, and prevent the beam from generating excessive displacement or stress. The shock absorbers 3 at both ends are mainly responsible for reducing the end movement of the beam, especially under unbalanced loads or external disturbances, to ensure the balance of the beam.

[0036] The balance beam 1 is V-shaped overall and has a box-shaped cross-section, as shown in the details below. Figure 1As shown, the balance beam 1 includes a top plate 6, a bottom plate 7, outer vertical plates 8, blocking plates 9, a first reinforcing plate 12, a bushing 13, and a second reinforcing plate 14. The bottom plate 7 is a V-shaped bent plate structure. Both ends of the bottom plate 7 have horizontal sections with several mounting holes for fixed connection with the shock absorber 3. The two ends of the bottom plate 7 are welded and fixed with blocking plates 9, which can close the ends of the balance beam 1 to prevent the internal structure from being exposed or damaged. The tops of the two blocking plates 9 are fixedly connected to the top plate 6, and the top plate 6 and the blocking plates 9 are welded and fixed together. There are two outer vertical plates 8, which are welded and fixed between the top plate 6 and the bottom plate 7 to cooperate with the blocking plates 9 to form the side plates of the balance beam 1.

[0037] The balance beam 1 is V-shaped, which can better disperse the bending stress generated during vehicle operation. The V-shaped structure can also provide higher structural stability, prevent excessive deformation under vertical and lateral forces, and maintain the overall stiffness of the balance beam 1. At the same time, the balance beam 1 adopts a box section, which can provide good bending and torsional resistance. It can not only increase strength and stiffness, but also effectively disperse stress and help to bear loads in all directions.

[0038] Lifting lugs 10 are welded and fixed to the outer walls at both ends of the top plate 6 to facilitate the hoisting of the balance beam 1 as a whole. A bushing 13 is welded and fixed to the middle position of the balance beam 1 for rotational connection with the balance shaft assembly 4. The bushing 13 is welded and fixed to the middle position of the two outer vertical plates 8, and the two ends of the bushing 13 pass through the two outer vertical plates 8 of the balance beam 1. A first reinforcing plate 12 and a second reinforcing plate 14 are welded and fixed to the inside of the balance beam 1. The first reinforcing plate 12 is V-shaped and is welded and fixed to the bottom plate 7 so that the balance beam 1. When subjected to longitudinal load, it can distribute stress evenly, reduce local stress concentration, and thus improve bending stiffness. The top of the first reinforcing plate 12 is provided with an arc-shaped groove to support the bushing 13. The first reinforcing plate 12 is fixedly connected to the bushing 13 by welding. Several second reinforcing plates 14 are provided, and the several second reinforcing plates 14 are distributed at intervals around the bushing 13. The outer wall of the bushing 13 is fixedly welded to the top plate 6 and the bottom plate 7 through the second reinforcing plates 14, which can improve the local stiffness of the bushing 13 and the overall strength of the balance beam structure.

[0039] like Figure 1 and Figure 6As shown, several bolt holes are provided at both ends of the horizontal section of the base plate 7, so that the limiting pad 11 can be detachably installed by bolt connection. The limiting pad 11 is located on the outside of the outer upright plate 8, and the edge of the limiting pad 11 extends outward from the base plate 7 to prevent the impact from being too great and causing damage to the structure of the balance beam 1 when the balance beam 1 swings. A limiting seat is provided at the corresponding position on the frame, which will play a role in protecting the balance beam 1 under extreme working conditions to avoid direct impact on the balance beam 1 and effectively improve the service life of the balance beam 1.

[0040] The balance shaft assembly 4 is rotatably mounted within the bushing 13, such as... Figure 4 and Figure 5 As shown, the balance shaft assembly 4 includes: a balance shaft 27 and two balance shaft end cap brackets. The two balance shaft end cap brackets are arranged opposite each other and are sleeved on the outside of the balance shaft 27. The balance shaft end cap brackets and the balance shaft 27 are fitted together. The first bolt holes 17 on the two balance shaft end cap brackets are connected by a central bolt 29. The central bolt 29 passes through the inside of the balance shaft 27. One end of the central bolt 29 is threaded to a self-locking nut 28, and the other end of the central bolt 29 is threaded to a threaded plate stop 26. The balance shaft 27 is limited and fixed by the cooperation of the balance shaft end cap brackets and the central bolt 29. A tapered rubber bearing 30 is installed on the first connecting surface 23 of each balance shaft end cap bracket. The tapered rubber bearing 30 is rotatably connected to the bushing 13. The mounting and fixing part 15 is fixedly connected to the balance beam bracket 5 on the frame by fixing bolts.

[0041] Understandably, in order to facilitate the installation of the tapered rubber bearing 30, the interior of the bushing 13 is also a tapered space with a matching shape.

[0042] The bushing 13, in conjunction with the tapered rubber bearing 30, positions the balance shaft end cover bracket. The balance shaft 27 is fitted in the middle of the balance shaft end cover bracket, which can keep the balance shaft 27 stable during operation and reduce the impact on the balance shaft 27. The bushing 13 can evenly transmit the force from the road surface to the balance shaft end cover bracket, thereby reducing the risk of structural fatigue and damage.

[0043] Specifically, the balance shaft end cover bracket includes a mounting and fixing part 15 and a support part 20. The mounting and fixing part 15 is a plate-shaped structure with several bolt holes, which is fixedly connected to the balance beam bracket 5 on the frame by bolts. The support part 20 is fixedly disposed on one end face of the mounting and fixing part 15. The support part 20 is coaxially arranged with the mounting and fixing part 15. The inside of the support part 20 is used to install the balance shaft 27, and the outside of the support part 20 is used to install the tapered rubber bearing 30, which is connected to the balance beam 1. In this embodiment, the mounting and fixing part 15 and the support part 20 are integrally formed casting structures, which do not require assembly and reduce the stress concentration problem that may occur during the welding process, thereby enhancing the overall strength and rigidity.

[0044] The mounting and fixing part 15 is a plate-shaped structure. One end face of the mounting and fixing part 15 is fixedly connected to the support part 20. Several reinforcing ribs 16 are fixedly provided on the other end face of the mounting and fixing part 15 to significantly enhance the overall rigidity and deformation resistance of the mounting and fixing part 15, while optimizing the load distribution, reducing local stress concentration, and extending its service life. Several bolt holes are provided on the mounting and fixing part 15. The bolt holes are divided into a first bolt hole 17, a second bolt hole 18, and a third bolt hole 19. There is one first bolt hole 17, which is located at the center of the mounting and fixing part 15 and communicates with the interior of the support part 20 for the installation of the center bolt 29. Several second bolt holes 18 are provided and distributed around the periphery of the mounting and fixing part 15 for the installation of fixing bolts. The fixing bolts are used to fix the part to the balance beam bracket 5 on the frame. Several third bolt holes 19 are provided and are close to the second bolt holes 18 to reduce the stress near the second bolt holes 18 and avoid stress concentration and cracking.

[0045] The reinforcing ribs 16 on the end face of the mounting and fixing part 15 form a mounting groove 25 around the first bolt hole 17 for the installation of the self-locking nut 28 and the threaded plate stop 26, so as to protect the threaded plate stop 26 and the self-locking nut 28 from being exposed and damaged, thereby reducing maintenance costs.

[0046] The support part 20 is a hollow conical structure, which not only reduces the weight of the bracket but also optimizes the structural strength. The interior of the support part 20 is provided with stepped channels for installing and positioning the balance shaft 27. The stepped channels include a first shaft mounting hole 21 and a second shaft mounting hole 22, which are coaxially arranged. The first shaft mounting hole 21 is located at the open end of the support part 20 (i.e., the end of the support part 20 away from the mounting and fixing part 15). The first shaft mounting hole 21 is a circular hole structure with a uniform arc surface. The second shaft mounting hole 22 is a conical hole structure with a tapered surface of varying diameter. The diameter of the first shaft mounting hole 21 is the same as the maximum diameter of the second shaft mounting hole 22. The diameter of the second shaft mounting hole 22 gradually decreases towards the mounting and fixing part 15. The first shaft mounting hole 21 facilitates the installation of the balance shaft 27, and the setting of the second shaft mounting hole 22 ensures the installation accuracy of the balance shaft 27.

[0047] The outer wall of the support part 20 includes two connecting surfaces, namely a first connecting surface 23 and a second connecting surface 24. The first connecting surface 23 is a tapered surface for connecting with the tapered rubber shaft 30, and the second connecting surface 24 is a uniform arc-shaped surface for connecting with the balance beam bracket 5 on the frame.

[0048] The balance shaft end cap brackets are used in pairs. The tapered first connecting surface 23 is used to install the tapered rubber bearing 30. Utilizing the elasticity and shock absorption characteristics of the rubber material, it can effectively absorb and buffer the vibration and impact generated during vehicle operation, which can greatly improve the smoothness and driving comfort of the vehicle. The tapered surface of the second shaft mounting hole 22 inside the balance shaft end cap bracket holds the balance shaft 27 shaft body. The two balance shaft end cap brackets are fixed by docking. With the use of the center bolt 29, the loosening of the balance shaft 27 can be effectively restricted. During installation, there is a set gap between the two balance shaft end cap brackets, which can effectively avoid direct contact and friction between the two balance shaft end cap brackets, thereby reducing wear and extending service life. At the same time, the gap allows the two balance shaft end cap brackets to have sufficient freedom under force, avoiding mutual interference and deformation.

[0049] Both the self-locking nut 28 and the threaded plate stop 26 are placed in the mounting groove 25 on the end face of the corresponding mounting and fixing part 15 to hide the threaded plate stop 26 and the self-locking nut 28, so as to prevent the threaded plate stop 26 and the self-locking nut 28 from being exposed and damaged.

[0050] In an articulated truck suspension system, the balance shaft 27 is connected to two mating balance shaft end cap brackets. A center bolt 29 secures the balance shaft 27 through the first bolt hole 17 on the mounting and fixing part 15. The balance shaft end cap brackets are used in pairs, installed on both sides of the vehicle frame. The two brackets mat together to form a single structure, clamping and fixing the balance shaft 27. The center bolt 29 passes through the balance shaft 27, firmly securing it to the balance shaft end cap brackets. This method ensures a tight connection and stability between the balance shaft 27 and the balance shaft end cap brackets. The paired balance shaft end cap brackets provide double support, distributing the load, reducing the pressure on a single bracket, and improving overall stability and durability. The mating structure allows the force on the balance shaft to be evenly distributed across the two balance shaft end cap brackets, avoiding localized stress concentration and reducing the risk of deformation and damage to the balance shaft end cap brackets. By combining the center bolt 29 and the docking bracket (stepped hole docking), the balance shaft 27 is firmly fixed, preventing displacement or loosening during vehicle operation. This distributes the force from the balance shaft 27 evenly onto the frame, avoiding localized stress concentration and improving the overall durability of the suspension system.

[0051] The balance shaft end cap bracket is bolted to the balance beam bracket 5 of the vehicle frame, serving to connect the vehicle frame and the suspension system. This connection method uses bolts to firmly fix the balance shaft end cap bracket to the balance beam bracket 5 of the vehicle frame, ensuring the stability and reliability of the balance shaft and suspension system. The balance shaft end cap bracket provides stable support for the balance shaft 13 and the suspension system, ensuring that they maintain the correct position during vehicle operation and do not shift or loosen. Through bolt fixing, the bracket evenly transmits the forces from the balance shaft 27 and the suspension system to the vehicle frame, ensuring uniform and stable stress distribution throughout the system. The balance shaft end cap bracket, bolted to the balance beam bracket 5 of the vehicle frame, serves to connect the vehicle frame and the suspension system, ensuring the normal operation of the suspension system. The balance shaft end cap bracket can disperse and reduce the transmission of impact forces, protecting the vehicle frame and other components of the suspension system.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A balanced suspension system, comprising: Balancing beam (1), characterized in that the two ends of the balancing beam (1) are fixedly connected with the two adjacent axles (2) through a shock absorber (3), and a shaft sleeve (13) is fixedly arranged at the middle position of the balancing beam (1), the shaft sleeve (13) is hingedly connected with a balancing beam support (5) through a balancing shaft assembly (4), and the balancing beam support (5) is fixedly installed on the vehicle frame; The balancing shaft assembly (4) comprises a balancing shaft (27) which is inserted and fixed in two oppositely arranged balancing shaft end cover supports, the two balancing shaft end cover supports are connected through a center bolt (29), the center bolt (29) passes through the inside of the balancing shaft (27), the balancing shaft end cover support is rotatably connected with the balancing beam (1) through a tapered rubber bearing, and the balancing shaft end cover support is fixedly connected with the balancing beam support (5).

2. The balanced suspension system of claim 1, wherein, The balancing shaft end cover support is rotatably installed in the shaft sleeve (13) through a tapered rubber bearing.

3. The balanced suspension system of claim 1, wherein, The balancing shaft end cover support comprises a mounting and fixing portion (15) provided with a plurality of bolt holes, a supporting portion (20) is fixedly arranged on one end face of the mounting and fixing portion (15), the supporting portion (20) is a hollow tapered structure, a stepped hole is arranged in the inside of the supporting portion (20) for mounting the balancing shaft (27), and a tapered rubber bearing (30) is mounted on the outside of the supporting portion (20).

4. The balance suspension system of claim 3, wherein, The stepped hole comprises coaxial first shaft body mounting holes (21) and second shaft body mounting holes (22), the first shaft body mounting holes (21) are located at the opening end of the supporting portion (20), the first shaft body mounting holes (21) are circular hole structures, the second shaft body mounting holes (22) are tapered hole structures, and the diameter of the second shaft body mounting holes (22) gradually decreases towards the direction close to the mounting and fixing portion (15).

5. The balance suspension system of claim 4, wherein, The diameter of the first shaft body mounting hole (21) is the same as the maximum diameter of the second shaft body mounting hole (22).

6. The balanced suspension system of claim 1, wherein, The two balancing shaft end cover supports have a gap therebetween.

7. The balance suspension system of claim 1, wherein, The balancing beam (1) is in a V shape as a whole, and the balancing beam (1) is in a box-shaped cross section.

8. The balance suspension system of claim 1, wherein, The balancing beam (1) comprises a top plate (6) and a bottom plate (7), the top plate (6) and the bottom plate (7) are fixedly connected through a baffle plate (9) and an outer vertical plate (8), the bottom plate (7) is a V-shaped bent plate structure, the two ends of the bottom plate (7) contain horizontal sections connected with the shock absorbers (3), and the shaft sleeve (13) is fixedly arranged on the outer vertical plate (8).

9. The balance suspension system of claim 8, wherein, A plurality of reinforcing plates are fixedly arranged in the balancing beam (1) and connected with the shaft sleeve (13).

10. The balanced suspension system of claim 8, wherein, Limiting pads (11) are detachably installed at the two ends of the horizontal sections of the bottom plate (7), the limiting pads (11) are located outside the outer vertical plate (8), and the edges of the limiting pads (11) extend outward beyond the bottom plate (7).

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