Air suspension structure for commercial vehicle

Abstract

The invention discloses an air suspension structure for a commercial vehicle, and relates to the technical field of automobile suspensions. An air spring is arranged at the lower end of the frame, the axle is located below the frame, a limiting rod is arranged on the inner side of the fixing frame and sleeved with a partition lining, a guide arm is arranged between the fixing frame and the air spring and comprises a first connecting frame and a second connecting frame, and the left side end of the first connecting frame is fixedly connected with a first plate spring. The right side end of the second connecting frame is fixedly connected with a second plate spring, and the axle is located between the first connecting frame and the second connecting frame. The second plate spring is of a Z-shaped structural design, the right side end of the second plate spring is inclined backwards, and the right side end of the upper surface of the second plate spring is used for providing a mounting position for the air spring; a transverse plate assembly on a guide arm in a traditional suspension structure is removed, and the air suspension structure is simplified; the mass of the guide arm is reduced, so that the integration of the air suspension structure is reduced; and arrangement of transverse space and longitudinal space of the guide arm is reduced, and meanwhile later repair and maintenance of the guide arm are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile suspension, and in particular to an air suspension structure for commercial vehicles. Background Art

[0002] The components of a commercial vehicle air suspension structure need to be properly arranged and assembled. However, when the layout space is limited, the air suspension is difficult to arrange within the limited space, and the number of components has a direct impact on the quality of the suspension system.

[0003] Related technologies have proposed integrated air suspension structures, which integrate related functions into relevant components, reducing the number of parts and reducing the overall mass of the suspension structure. The air spring is bolted to the cross-plate assembly, defining a fixed mounting surface for the air spring. The lower end of the shock absorber is mounted to the right end of the upper leaf spring via a lower shock absorber bracket. Existing suspension structures suffer from relatively high mass, high manufacturing costs, and space consumption.

[0004] Therefore, the present application proposes an air suspension structure for commercial vehicles to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an air suspension structure for commercial vehicles, which solves the technical problems raised in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an air suspension structure for a commercial vehicle, comprising:

[0007] A vehicle frame, wherein an air spring is provided at the lower end of the vehicle frame;

[0008] an axle, the axle being located below the frame;

[0009] A fixed frame, wherein the rear end of the fixed frame is fixedly connected to a fixed plate, the fixed plate is provided with a mounting hole, the fixed plate is connected to the vehicle frame through the mounting hole, a limit rod is provided on the inner side of the fixed frame, the front and rear ends of the limit rod are rotatably connected to the front and rear inner walls of the fixed frame respectively, a partition bushing is sleeved on the limit rod, and a guide arm is provided between the fixed frame and the air spring;

[0010] The guide arm includes a connecting frame 1 and a connecting frame 2. The left end of the connecting frame 1 is fixedly connected to a leaf spring 1, and the right end of the connecting frame 2 is fixedly connected to a leaf spring 2. The axle is located between the connecting frame 1 and the connecting frame 2.

[0011] Preferably, the upper and lower sides of the right side end of the connecting frame 1 are fixedly connected with a connecting plate 1, and the upper and lower sides of the left side end of the connecting frame 2 are fixedly connected with a connecting plate 2. Two fixing bolts 1 are provided on the left side of the upper connecting frame 1. The right end of the fixing bolt 1 passes through the upper connecting frame 1 and the upper connecting frame 2 in sequence and is threadedly connected with a nut. The left and right ends of the axle respectively abut against the adjacent side walls of the connecting frame 1 and the connecting frame 2.

[0012] Preferably, the left end of the leaf spring 1 is provided with an upwardly bent ear, and the ear sleeve is provided on the partition bushing.

[0013] Preferably, the leaf spring 2 is in a Z-shaped structure as a whole, and the right end of the leaf spring 2 extends backward and is fixedly connected to the lower end of the air spring.

[0014] Preferably, a bottom connecting plate and two fixing bolts 2 are provided under the axle, and a limiting slot 1 and a limiting slot 2 are provided on the bottom connecting plate, and the limiting slot 1 and the limiting slot 2 are vertically staggered. The right end of the fixing bolt 2 sequentially passes through the left side wall of the limiting slot 2, the lower end connecting plate 1, the lower end connecting plate 2 and the right side wall of the limiting slot 2 and are threadedly connected with a nut, and the lower ends of the connecting frame 1 and the connecting frame 2 both extend into the limiting slot 1.

[0015] Preferably, the rear end of the bottom connecting plate is fixedly connected to an auxiliary frame, a shock absorber is hinged on the auxiliary frame, an upper fixing frame is hinged on the upper end of the shock absorber, a mounting hole is opened on the upper fixing frame, and the upper fixing frame is fixedly connected to the frame through bolts and the mounting holes.

[0016] Compared with related technologies, the air suspension structure for commercial vehicles provided by the present invention has the following beneficial effects:

[0017] 1. The present invention provides an air suspension structure for commercial vehicles. The leaf spring has a Z-shaped structure, and the right end of the leaf spring is tilted backward. The right end of the upper surface of the leaf spring provides a mounting position for the air spring. The cross plate assembly on the guide arm in the traditional suspension structure is removed, simplifying the air suspension structure. At the same time, the vertical distance between the guide arms is also reduced, reducing the weight of the guide arms, thereby reducing the integrated weight of the air suspension structure.

[0018] 2. The present invention provides an air suspension structure for commercial vehicles. By designing the guide arm into two parts, leaf spring 1 and leaf spring 2, which are directly fixed on the vehicle axle, the guide arm installation components are reduced, the guide arm installation process is simplified, the lateral space and longitudinal space layout of the guide arm are reduced, and the later repair and maintenance of the guide arm are facilitated.

[0019] 3. The present invention provides an air suspension structure for commercial vehicles. By installing the bottom connecting plate on the axle, the installation of the air suspension structure body is made more stable, and the longitudinal layout space occupied by the air suspension is also reduced. By connecting the guide arm, the bottom connecting plate and the axle, the force on the guide arm during use is reduced, thereby improving the safety and service life of the guide arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the partition bushing position of the present invention;

[0023] Figure 4 It is a schematic diagram of a three-dimensional structure of a leaf spring of the present invention;

[0024] Figure 5 It is a schematic diagram of the second three-dimensional structure of the leaf spring of the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom connecting plate of the present invention.

[0026] In the figure: 1. Fixed plate; 2. Guide arm; 21. Connecting frame 1; 22. Leaf spring 1; 23. Connecting frame 2; 24. Leaf spring 2; 25. Connecting plate 1; 26. Connecting plate 2; 3. Axle; 4. Bottom connecting plate; 41. Limiting slot 1; 42. Limiting slot 2; 43. Auxiliary frame; 5. Upper fixing frame; 6. Shock absorber; 7. Air spring; 8. Limiting rod; 9. Partition bushing; 10. Frame; 11. Fixed frame; 12. Fixing bolt 1; 13. Fixing bolt 2. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] See also Figures 1-6 The present invention provides a technical solution: an air suspension structure for a commercial vehicle, comprising:

[0029] The frame 10 has an air spring 7 at its lower end;

[0030] Axle 3, which is located below the frame 10;

[0031] A fixing frame 11 is fixedly connected to a fixing plate 1 at its rear end. The fixing plate 1 is provided with a mounting hole. The fixing plate 1 is connected to the vehicle frame 10 through the mounting hole. A limit rod 8 is provided on the inner side of the fixing frame 11. The front and rear ends of the limit rod 8 are rotatably connected to the front and rear inner walls of the fixing frame 11 respectively. A partition bushing 9 is sleeved on the limit rod 8. A guide arm 2 is provided between the fixing frame 11 and the air spring 7. The provision of the partition bushing 9 reduces the wear between the lifting ear at the left end of the leaf spring 22 and the limit rod 8.

[0032] The guide arm 2 includes a connecting frame 1 21 and a connecting frame 23. The left end of the connecting frame 1 21 is fixedly connected to a leaf spring 1 22, and the right end of the connecting frame 2 23 is fixedly connected to a leaf spring 24. The axle 3 is located between the connecting frame 1 21 and the connecting frame 2 23.

[0033] The upper and lower sides of the right end of the connecting frame 1 21 are fixedly connected to the connecting plate 1 25, and the upper and lower sides of the left end of the connecting frame 2 23 are fixedly connected to the connecting plate 2 26. Two fixing bolts 12 are provided on the left side of the upper connecting frame 1 21. The right ends of the fixing bolts 12 pass through the upper connecting frame 1 21 and the upper connecting frame 2 23 in sequence and are threadedly connected with nuts. The left and right ends of the axle 3 are respectively in contact with the adjacent side walls of the connecting frame 1 21 and the connecting frame 2 23.

[0034] The left end of the leaf spring 1 22 is provided with an upwardly bent ear, which is sleeved on the partition bushing 9. The left end of the leaf spring 1 22 is connected to the ear and the partition bushing 9 to enable the right end of the leaf spring 1 22 to rotate around the central axis of the limit rod 8 as the rotation axis;

[0035] The leaf spring 24 is formed into a Z-shaped structure as a whole, and the leaf spring 24 is formed by torsion so that the right end of the leaf spring 24 extends backward, and the right end of the upper surface of the leaf spring 24 is fixedly connected to the lower end of the air spring 7. The leaf spring 24 is formed by torsion and has a Z-shaped structure to reduce the layout of the horizontal space and longitudinal space of the guide arm 2.

[0036] A bottom connecting plate 4 and two fixing bolts 2 13 are provided below the axle 3. A limiting groove 1 41 and a limiting groove 2 42 are provided on the bottom connecting plate 4. The limiting groove 1 41 and the limiting groove 2 42 are vertically staggered. The right end of the fixing bolt 2 13 sequentially passes through the left side wall of the limiting groove 2 42 and the lower end connecting plate 1 25. The lower end connecting plate 2 26 and the right side wall of the limiting groove 2 42 are threadedly connected with a nut. The lower ends of the connecting frame 1 21 and the connecting frame 2 23 both extend into the limiting groove 1 41. The leaf spring 1 22 and the leaf spring 2 24 are connected to the axle 3 through the connecting frame 1 21 and the connecting frame 2 23. The firm connection between the axle 3 and the guide arm 2 is ensured by the cooperation of the fixing bolt 12, the fixing bolt 2 13, the connecting plate 1 25 and the connecting plate 2 26.

[0037] The rear end of the bottom connecting plate 4 is fixedly connected to an auxiliary frame 43, a shock absorber 6 is hinged on the auxiliary frame 43, an upper fixing frame 5 is hinged on the upper end of the shock absorber 6, and a mounting hole is opened on the upper fixing frame 5. The upper fixing frame 5 is fixedly connected to the frame 10 through bolts and the mounting holes, and the connection between the upper fixing frame 5 and the frame 10 is realized through the bottom connecting plate 4, the auxiliary frame 43 and the shock absorber 6.

[0038] Working principle: The left end of the leaf spring 1 22 in the guide arm 2 of the device is connected to the fixed plate 1 by the cooperation of the upwardly bent ear and the partition bushing 9, and when the guide arm 2 is subjected to force, the right end of the leaf spring 1 22 can realize the rotation of the right end of the leaf spring 1 22 around the central axis of the limit rod 8 as the rotation axis; the leaf spring 1 22 and the leaf spring 2 24 are connected to the axle 3 through the connection frame 1 21 and the connection frame 2 23, and the connection between the leaf spring 1 22 and the fixed plate 1 26 is realized by the cooperation of the fixing bolt 12, the fixing bolt 2 13, the connecting plate 1 25 and the connecting plate 2 Ensure a firm connection between the axle 3 and the guide arm 2, and realize the connection with the frame 10 through the bottom connecting plate 4, the auxiliary frame 43 and the shock absorber 6; wherein, the Z-shaped structure design of the leaf spring 24 is adopted, and the right end of the leaf spring 24 is tilted backward, and the right end of the upper surface of the leaf spring 24 is used to provide an installation position for the air spring 7; remove the cross plate assembly on the guide arm 2 in the traditional suspension structure, and simplify the air suspension structure; at the same time, the guide arm 2 is also reduced in the upper and lower distances, which reduces the mass of the guide arm 2 and thereby reduces the integrated mass of the air suspension structure. By designing the guide arm 2 into two parts, leaf spring 1 22 and leaf spring 2 24, which are directly fixed on the axle 3, the number of installation components of the guide arm 2 is reduced, the installation process of the guide arm 2 is simplified, and the later repair and maintenance of the guide arm 2 is facilitated; the bottom connecting plate 4 is installed on the axle 3, so that the installation of the air suspension structure body is more stable, and the longitudinal layout space of the air suspension is also reduced. By connecting the guide arm 2, the bottom connecting plate 4 and the axle 3, the force on the guide arm 2 during use is reduced, thereby improving the safety and service life of the guide arm 2.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An air suspension structure for a commercial vehicle, characterized in that: include: A vehicle frame (10), wherein an air spring (7) is provided at the lower end of the vehicle frame (10); A vehicle axle (3), the vehicle axle (3) being located below the vehicle frame (10); A fixed frame (11), wherein the rear end of the fixed frame (11) is fixedly connected to a fixed plate (1), a mounting hole is provided on the fixed plate (1), and the fixed plate (1) is connected to the vehicle frame (10) through the mounting hole. A limiting rod (8) is provided on the inner side of the fixed frame (11), and the front and rear ends of the limiting rod (8) are respectively rotatably connected to the front and rear inner walls of the fixed frame (11). A partition bushing (9) is sleeved on the limiting rod (8), and a guide arm (2) is provided between the fixed frame (11) and the air spring (7); The guide arm (2) comprises a connecting frame 1 (21) and a connecting frame 2 (23); the left end of the connecting frame 1 (21) is fixedly connected to a leaf spring 1 (22); the right end of the connecting frame 2 (23) is fixedly connected to a leaf spring 2 (24); and the axle (3) is located between the connecting frame 1 (21) and the connecting frame 2 (23).

2. The air suspension structure for a commercial vehicle according to claim 1, characterized in that: The upper and lower sides of the right side end of the connecting frame 1 (21) are fixedly connected with a connecting plate 1 (25), and the upper and lower sides of the left side end of the connecting frame 2 (23) are fixedly connected with a connecting plate 2 (26). Two fixing bolts 1 (12) are provided on the left side of the upper connecting frame 1 (21). The right side ends of the fixing bolts 1 (12) pass through the upper connecting frame 1 (21) and the upper connecting frame 2 (23) in sequence and are threadedly connected with nuts. The left and right ends of the axle (3) are respectively in contact with the adjacent side walls of the connecting frame 1 (21) and the connecting frame 2 (23).

3. The air suspension structure for a commercial vehicle according to claim 1, characterized in that: The left end of the leaf spring 1 (22) is provided with an upwardly bent hanging ear, and the hanging ear sleeve is provided on the partition bushing (9).

4. The air suspension structure for a commercial vehicle according to claim 1, characterized in that: The leaf spring 2 (24) is in a Z-shaped structure as a whole, and the right side end of the leaf spring 2 (24) extends backward and is fixedly connected to the lower end of the air spring (7).

5. The air suspension structure for a commercial vehicle according to claim 2, characterized in that: A bottom connecting plate (4) and two fixing bolts (13) are provided below the axle (3). A limiting groove (41) and a limiting groove (42) are provided on the bottom connecting plate (4). The limiting groove (41) and the limiting groove (42) are vertically staggered. The right side end of the fixing bolt (13) sequentially passes through the left side wall of the limiting groove (42), the lower end connecting plate (25), the lower end connecting plate (26) and the right side wall of the limiting groove (42) and is threadedly connected with a nut. The lower ends of the connecting frame (21) and the connecting frame (23) both extend into the limiting groove (41).

6. The air suspension structure for a commercial vehicle according to claim 5, characterized in that: The rear end of the bottom connecting plate (4) is fixedly connected to an auxiliary frame (43), a shock absorber (6) is hinged on the auxiliary frame (43), an upper end of the shock absorber (6) is hinged to an upper fixing frame (5), a mounting hole is provided on the upper fixing frame (5), and the upper fixing frame (5) is fixedly connected to the vehicle frame (10) through bolts and the mounting hole.

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