A multi-stage load-bearing leaf-spring air suspension system

Abstract

The utility model relates to a kind of slice bar type air suspension systems of multistage bearing, including air spring assembly, slice bar assembly and vehicle frame, and the drive axle is equipped in the lower end of vehicle frame, air spring assembly and slice bar assembly are two groups, two groups air spring assembly and slice bar assembly are respectively symmetrically arranged in the lower end of vehicle frame, air spring assembly is equipped in air bag support upper end, slice bar support is equipped in the lower end of vehicle frame, air bag support lower end is connected with slice bar support by connecting bolt, slice bar assembly one end is hinged with vehicle frame, slice bar assembly other end is hinged with slice bar support, symmetrically arranged slice bar assembly is connected by stabilizer bar;Suspension system is adjusted gradually with load change, and variable stiffness characteristics make vehicle have better comfort under different loads, reduce the impact of impact force on chassis when loading and unloading container, effectively protect goods, improve chassis reliability.

Description

Technical Field

[0001] This utility model relates to the field of vehicle suspension technology, and in particular to a multi-level load-bearing leaf rod type air suspension system. Background Technology

[0002] Port transport vehicles are characterized by low-speed heavy-load operation, frequent start-stop cycles, cyclical operation, and high-intensity operation. To ensure the continuous normal operation of these vehicles, the reliability requirements for chassis load-bearing components are more stringent. Currently, most port transport vehicles use rigid suspensions or leaf spring suspensions. These suspensions lack elastic elements or use leaf springs as the elastic element to achieve system vibration isolation, resulting in a linear variation in suspension system stiffness. Furthermore, due to the high stiffness of these suspensions, they cannot effectively buffer the impact load on the chassis when containers fall, causing high stress on critical chassis components, compromising cargo safety, and leading to frequent damage to chassis load-bearing components. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-level load-bearing leaf-type air suspension system.

[0004] This utility model is achieved using the following technical solution:

[0005] A multi-stage load-bearing leaf spring air suspension system includes an air spring assembly, a leaf spring assembly, and a vehicle frame. The lower end of the vehicle frame is provided with a drive axle. The air spring assembly and leaf spring assembly are divided into two groups, and the two groups of air spring assemblies and leaf spring assemblies are symmetrically arranged at the lower end of the vehicle frame.

[0006] The air spring assembly is located at the upper end of the airbag support, and the lower end of the vehicle frame is provided with a leaf rod bracket. The lower end of the airbag support is connected to the leaf rod bracket by connecting bolts. One end of the leaf rod assembly is hinged to the vehicle frame, and the other end of the leaf rod assembly is hinged to the leaf rod bracket. The symmetrically arranged leaf rod assemblies are connected by stabilizer bars.

[0007] Furthermore, it also includes two sets of thrust rods and shock absorbers. The two sets of thrust rods are arranged in a figure-eight shape on the upper end of the drive axle. One end of the thrust rod is connected to the tail beam of the frame, and the other end of the thrust rod is connected to the drive axle.

[0008] The two sets of shock absorbers are respectively located on the left and right sides of the drive axle. The upper end of the shock absorber is connected to the vehicle frame through a shock absorber bracket, and the lower end of the shock absorber is connected to the leaf rod bracket.

[0009] Furthermore, the air spring assembly includes an airbag skin, a rubber spring is provided inside the airbag skin, an upper airbag top plate is provided at the upper end of the airbag skin, and a lower airbag bottom plate is provided at the lower end of the airbag skin. The upper airbag top plate and the lower airbag bottom plate are both connected to the airbag skin by bolts, and the lower airbag bottom plate is connected to the airbag support.

[0010] Furthermore, the upper end of the top plate of the airbag is provided with an airbag inlet and an airbag fixing stud. The airbag inlet is connected to the airbag skin. The lower end of the frame is provided with a positioning hole, and the airbag fixing stud is located in the positioning hole.

[0011] Furthermore, the rod assembly includes a rod body, with ball joint bushings at both ends of the rod body, which are respectively hinged to the vehicle frame and the rod support; the rod body also has a mounting base and a fixing plate, and the stabilizer rod is disposed in the mounting base and fixed by the fixing plate.

[0012] Furthermore, the fixing plate includes an upper fixing plate and a lower fixing plate, both of which are provided with fixing holes. The fixing holes are provided with longitudinal locking bolts. The fixing plates are provided with threaded holes. The stabilizer is provided with mounting holes. The mounting holes are provided with transverse locking bolts. The stabilizer is disposed in the mounting base. The end of the stabilizer is disposed between the upper fixing plate and the lower fixing plate. The stabilizer is longitudinally fixed by the longitudinal locking bolts and transversely fixed by the transverse locking bolts.

[0013] Furthermore, the stabilizer bar has a U-shaped structure.

[0014] Furthermore, the ball joint bushing includes a tube body, and the tube body is provided with a rubber vulcanization structure.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The suspension system adjusts progressively with load changes, and its variable stiffness characteristic ensures good comfort under various loads. It also reduces the impact of container loading and unloading on the chassis, effectively protecting cargo and improving chassis reliability. The air spring assembly incorporates an integrated structure of rubber springs, adapting to various operating conditions including unloaded, partially loaded, and heavily loaded vehicles, demonstrating excellent adaptability. The leaf spring assembly and thrust rod together form the suspension system's guiding device, ensuring vehicle stability. The frame structure formed by the stabilizer bar and leaf spring assembly enhances the vehicle's torsional resistance and improves the chassis's impact resistance. The compact layout provides installation space for other chassis components, and the integrated component design reduces the number of parts and lowers costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the air spring assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the plate rod assembly of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the stabilizer bar of this utility model.

[0021] Figure Labels

[0022] 1. Air spring assembly; 101. Airbag skin; 102. Airbag top plate; 103. Airbag inlet; 104. Airbag fixing stud; 105. Rubber spring; 106. Fixing bolt; 107. Airbag bottom plate; 2. Shock absorber bracket; 3. Shock absorber; 4. Thrust rod; 5. Connecting bolt; 6. Leaf rod assembly; 601. Ball joint bushing; 602. Rod body; 603. Mounting seat; 604. Fixing plate; 605. Upper fixing plate; 606. Lower fixing plate; 7. Stabilizer bar; 8. Frame; 9. Leaf rod bracket; 10. Airbag support; 11. Drive axle; 12. Longitudinal locking bolt; 13. Lateral locking bolt. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0024] like Figure 1 As shown, a multi-stage load-bearing leaf spring air suspension system includes an air spring assembly 1, a leaf spring assembly 6, and a frame 8. A drive axle 11 is provided at the lower end of the frame 8. The air spring assembly 1 and the leaf spring assembly 6 are in two sets, and the two sets of air spring assemblies 1 and leaf spring assemblies 6 are symmetrically arranged at the lower end of the frame 8.

[0025] The air spring assembly 1 is located on the upper end of the airbag support 10. The lower end of the frame 8 is provided with a leaf rod bracket 9. The lower end of the airbag support 10 is connected to the leaf rod bracket 9 by connecting bolts 5. One end of the leaf rod assembly 6 is hinged to the frame 8, and the other end of the leaf rod assembly 6 is hinged to the leaf rod bracket 9. The symmetrically arranged leaf rod assemblies 6 are connected by stabilizer bars 7.

[0026] It also includes two sets of thrust rods 4 and a shock absorber 3. The two sets of thrust rods 4 are arranged in a figure-eight shape on the upper end of the drive axle 11. One end of the thrust rod 4 is connected to the tail beam of the frame 8, and the other end of the thrust rod 4 is connected to the drive axle 11.

[0027] Two sets of shock absorbers 3 are respectively located on the left and right sides of the drive axle 11. The upper end of the shock absorber 3 is connected to the frame 8 through the shock absorber bracket 2, and the lower end of the shock absorber 3 is connected to the leaf rod bracket 9.

[0028] Two leaf spring assemblies 6 are arranged on the left and right sides in front of the drive axle 11. The leaf spring assemblies 6 are parallel to the frame 8 and constitute the first guide device of the suspension system.

[0029] Two thrust rods 4 are arranged in a figure-eight shape above the rear of the drive axle 11, forming the second guide device of the suspension system.

[0030] The first and second guide devices are arranged in a Z-shape on the frame 8, which saves installation space and increases installation space for other parts of the frame chassis.

[0031] The stabilizer bar 7 has a U-shaped structure and is installed inside the left and right leaf rod assemblies 6. Together with the leaf rod assemblies 6, it forms a frame structure, increasing the roll stiffness of the chassis and improving the driving stability of the chassis.

[0032] like Figure 2 As shown, the air spring assembly 1 includes an airbag skin 101, a rubber spring 105 is provided inside the airbag skin 101, an upper airbag top plate 102 is provided at the upper end of the airbag skin 101, and a lower airbag bottom plate 107 is provided at the lower end of the airbag skin 101. The upper airbag top plate 102 and the lower airbag bottom plate 107 are both connected to the airbag skin 101 by fixing bolts 106, and the lower airbag bottom plate 107 is connected to the airbag support 10.

[0033] The upper end of the airbag top plate 102 is provided with an airbag inlet 103 and an airbag fixing stud 104. The airbag inlet 103 is connected to the airbag skin 101. The lower end of the frame 8 is provided with a positioning hole, and the airbag fixing stud 104 is located in the positioning hole.

[0034] The air spring assembly 1 is symmetrically arranged on the left and right sides of the frame 8, and is located vertically between the drive axle 11 and the frame 8, serving to support the weight of the cargo.

[0035] As the vehicle load changes, the air spring assembly 1 has three working states: when unloaded, it is supported by the airbag skin 101; when half-loaded, the airbag skin 101 and the rubber spring 105 jointly support it; and when heavily loaded, the upper airbag plate 102 and the lower airbag plate 107 contact each other to support it, and the suspension system is in a rigid state.

[0036] like Figure 3As shown, the rod assembly 6 includes a rod body 602, with ball joint bushings 601 at both ends of the rod body 602. The ball joint bushings 601 are respectively hinged to the frame 8 and the rod support 9. The rod body 602 is also provided with a mounting base 603 and a fixing plate 604. The stabilizer rod 7 is located in the mounting base 603 and is fixed by the fixing plate 604.

[0037] The rod body 602 of the plate rod assembly 6 is a large blade plate structure, which has high strength and rigidity; the ball joint bushing 601 is a metal tube and rubber vulcanization structure, which has vibration isolation and buffering function.

[0038] The fixing plate 604 includes an upper fixing plate 605 and a lower fixing plate 606. Both the upper fixing plate 605 and the lower fixing plate 606 are provided with fixing holes. The fixing holes are provided with longitudinal locking bolts 12. The fixing plate 604 is provided with threaded holes. The stabilizer 7 is provided with mounting holes. The mounting holes are provided with transverse locking bolts 13. The stabilizer 7 is located in the mounting base 603. The end of the stabilizer 7 is located between the upper fixing plate 605 and the lower fixing plate 606. The stabilizer 7 is longitudinally fixed by the longitudinal locking bolts 12 and transversely fixed by the transverse locking bolts 13.

[0039] like Figure 4 As shown, the U-shaped open end of the stabilizer bar 7 passes through the mounting base 603 of the plate rod assembly 6. The U-shaped open end of the stabilizer bar 7 is connected to the fixing plate 604 by the transverse locking bolts 13 to achieve transverse fixation. The U-shaped open end of the stabilizer bar 7 is clamped by the longitudinal locking bolts 12 of the upper fixing plate 605 and the lower fixing plate 606, and then the nuts are tightened to achieve longitudinal fixation. This provides installation space for the drive axle 11 and other parts, and has the advantage of compact structure.

[0040] The stabilizer bar 7 has a U-shaped structure.

[0041] The ball joint bushing 601 includes a tube body, and a rubber vulcanized knot is provided outside the tube body.

Claims

1. A multi-stage load-bearing leaf-bar air suspension system, characterized in that, It includes an air spring assembly (1), a leaf spring assembly (6) and a frame (8). The lower end of the frame (8) is provided with a drive axle (11). The air spring assembly (1) and the leaf spring assembly (6) are in two sets, and the two sets of air spring assemblies (1) and leaf spring assemblies (6) are symmetrically arranged at the lower end of the frame (8). The air spring assembly (1) is located on the upper end of the airbag support (10). The lower end of the frame (8) is provided with a leaf rod bracket (9). The lower end of the airbag support (10) is connected to the leaf rod bracket (9) by a connecting bolt (5). One end of the leaf rod assembly (6) is hinged to the frame (8), and the other end of the leaf rod assembly (6) is hinged to the leaf rod bracket (9). The symmetrically arranged leaf rod assemblies (6) are connected by a stabilizer bar (7).

2. The multi-stage load-bearing leaf-bar air suspension system according to claim 1, characterized in that, It also includes two sets of thrust rods (4) and a shock absorber (3). The two sets of thrust rods (4) are arranged in a figure-eight shape on the upper end of the drive axle (11). One end of the thrust rod (4) is connected to the tail beam of the frame (8), and the other end of the thrust rod (4) is connected to the drive axle (11). The two sets of shock absorbers (3) are respectively located on the left and right sides of the drive axle (11). The upper end of the shock absorber (3) is connected to the vehicle frame (8) through the shock absorber bracket (2), and the lower end of the shock absorber (3) is connected to the leaf rod bracket (9).

3. The multi-stage load-bearing leaf-bar air suspension system according to claim 2, characterized in that, The air spring assembly (1) includes an airbag skin (101), a rubber spring (105) is provided inside the airbag skin (101), an airbag top plate (102) is provided at the upper end of the airbag skin (101), an airbag bottom plate (107) is provided at the lower end of the airbag skin (101), the airbag top plate (102) and the airbag bottom plate (107) are both connected to the airbag skin (101) by fixing bolts (106), and the airbag bottom plate (107) is connected to the airbag support (10).

4. The multi-stage load-bearing leaf-bar air suspension system according to claim 3, characterized in that, The upper end of the airbag top plate (102) is provided with an airbag inlet (103) and an airbag fixing stud (104). The airbag inlet (103) is connected to the airbag skin (101). The lower end of the vehicle frame (8) is provided with a positioning hole, and the airbag fixing stud (104) is located in the positioning hole.

5. The multi-stage load-bearing leaf-bar air suspension system according to claim 4, characterized in that, The plate rod assembly (6) includes a rod body (602), and both ends of the rod body (602) are provided with ball joint bushings (601). The ball joint bushings (601) are respectively hinged to the frame (8) and the plate rod bracket (9). The rod body (602) is also provided with a mounting base (603) and a fixing plate (604). The stabilizer rod (7) is located in the mounting base (603) and fixed by the fixing plate (604).

6. The multi-stage load-bearing leaf-bar air suspension system according to claim 5, characterized in that, The fixing plate (604) includes an upper fixing plate (605) and a lower fixing plate (606). Both the upper fixing plate (605) and the lower fixing plate (606) are provided with fixing holes. The fixing holes are provided with longitudinal locking bolts (12). The fixing plate (604) is provided with threaded holes. The stabilizer (7) is provided with mounting holes. The mounting holes are provided with transverse locking bolts (13). The stabilizer (7) is located in the mounting base (603). The end of the stabilizer (7) is located between the upper fixing plate (605) and the lower fixing plate (606). The stabilizer (7) is longitudinally fixed by the longitudinal locking bolts (12) and transversely fixed by the transverse locking bolts (13).

7. The multi-stage load-bearing leaf-type air suspension system according to claim 6, characterized in that, The stabilizer bar (7) has a U-shaped structure.

8. The multi-stage load-bearing leaf-type air suspension system according to claim 5, characterized in that, The ball joint bushing (601) includes a tube body, and the tube body is provided with a rubber vulcanization structure.

Images