Suspension system of platform truck
By designing a flatbed truck suspension system including suspension swing arms and shock absorbers, the problem of insufficient adaptability in the prior art is solved, and better ride comfort and cargo transportation stability are achieved.
Patent Information
- Application Number
- CN202421650084.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing flatbed truck suspension system is insufficiently adaptable when the load is small, resulting in poor comfort, especially in scenarios where personnel transfer and cargo transportation are taken into account.
A suspension system including suspension swing arm assembly, pin shaft, flat washer, spring washer, bolt, oil cup, open pin, shock absorber assembly and rubber shock absorber pad is designed. The shock absorption and buffering effect of the entire vehicle is achieved through the swing of the suspension swing arm and the compression and rebound of the shock absorber.
The suspension system is simple and compact in structure, light in weight, easy to arrange and assemble, which can effectively reduce vehicle bumps, improve ride comfort and stability in cargo transportation.
Smart Images
Figure CN222959547U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of personnel transportation and material handling, and particularly relates to a suspension system of a flat-bed truck. Background Art
[0002] At present, most domestic fixed-platform flat-bed trucks adopt leaf spring structures. However, with the higher requirements of drivers and passengers for the riding comfort of the product and the reduction of cargo jolts, the optimization of the suspension system of the above flat-bed trucks is becoming increasingly important. To solve the above problems, a hybrid suspension device combining leaf springs and air suspensions has emerged. The above two suspension devices are both fixed-type, and the shock absorption effect is achieved through the deformation of leaf springs or air suspensions. However, they are not suitable for small load weights. Especially for flat-bed trucks mainly used for personnel transfer and cargo transportation, the comfort is poor.
[0003] The prior art solution is a suspension device for a flat-bed truck, including a suspension swing arm assembly, a shock pad, and a shock absorber assembly installed on the vehicle frame. One end of the suspension swing arm assembly is connected to the vehicle frame mounting seat through a pin assembly, and the other end is connected to the vehicle frame crossbeam mounting seat through the shock absorber assembly, forming a box-shaped frame structure as a whole. One end of the shock absorber is connected to the suspension swing arm assembly through a pin, and the other end is connected to the vehicle frame crossbeam mounting seat through a pin. Further, the suspension swing arm assembly can rotate around the vehicle frame mounting seat. At the same time, the shock absorber assembly can be compressed, thereby playing a role in shock absorption for the whole vehicle. A bushing or sleeve is installed in the bushing mounting hole of the suspension swing arm assembly, and a grease nipple or oil cup is installed on the pin assembly, and a through hole for injecting grease is reserved, which can lubricate the pin and the bushing and reduce the wear of the pin. A limit plate is welded on the suspension swing arm. When the suspension swing arm swings, it will contact the shock pad on the vehicle frame, playing a role in limiting and buffering. The shock absorber is made of a material synthesized by rubber and metal, which can reduce the wear with the suspension swing arm and reduce the impact on the suspension system. There are the following deficiencies: The self-weight of the leaf spring suspension is large, increasing the weight of the whole vehicle, and the space required for layout is large, which has an adverse effect on the structural compactness of the whole vehicle. Summary of the Utility Model
[0004] In view of the above defects or deficiencies in the prior art, it is desired to provide a suspension system for a flat-bed truck, which has a simple and compact structure, a light self-weight, and is convenient for layout and assembly.
[0005] According to the technical solution provided by the embodiment of the present application,
[0006] A suspension system for a flatbed transporter, where the suspension swing arm and the sleeve are assembled into a suspension swing arm assembly. The suspension swing arm assembly is connected to the corresponding mounting holes on the vehicle frame through pin A. The suspension swing arm can swing up and down relative to the vehicle frame through pin A. Pin A is fixed to the vehicle frame through flat washer A, spring washer, and bolt. An oil cup is installed on pin A. The sleeve is installed in the corresponding mounting hole on the suspension swing arm. The sleeve and the suspension swing arm are assembled into a suspension swing arm assembly. Pin A is in direct clearance contact with the sleeve. The shock absorber assembly is connected to the corresponding mounting hole on the suspension swing arm through pin B. The split pin is connected to the corresponding mounting hole on pin B, effectively preventing pin B from slipping out of the corresponding mounting hole of the shock absorber. Multiple flat washers B are installed on pin B. Flat washer B is located between the split pin and the suspension swing arm and between the split pin and the vehicle frame mounting seat ear plate. The other end of the shock absorber assembly is connected to the vehicle frame mounting seat through pin B. The split pin is connected to the corresponding mounting hole on pin B.
[0007] Further, a limit plate is welded on the suspension swing arm.
[0008] Further, the shock absorber assembly, the suspension swing arm, and the vehicle frame assembly form a box-shaped frame structure.
[0009] Further, the shock pad is connected to the vehicle frame through nuts, and the shock pad and the vehicle frame are fixed.
[0010] Further, pin A is fixed relative to the vehicle frame.
[0011] Further, the sleeve is fixed relative to the suspension swing arm.
[0012] Further, the shock pad is made of a material composed of rubber and metal.
[0013] Further, the shock absorber assembly is theoretically vertically installed with the suspension swing arm. The shock absorber assembly is an elastic device composed of a spring and a damper.
[0014] In summary, the beneficial effects of the present application: The shock absorber assembly can be compressed, thus playing a role in damping the whole vehicle. A bushing or sleeve is installed in the bushing mounting hole of the suspension swing arm assembly. A grease nipple or oil cup is installed on the pin assembly, and a through hole for injecting grease is reserved, which can lubricate the pin and the bushing, reduce the wear of the pin, has a simple and compact structure, light self-weight, and is convenient for layout and assembly. Description of the Drawings
[0015] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present application will become more obvious:
[0016] Figure 1 It is a schematic structural diagram of the present utility model.
[0017] Reference numerals in the figure: 1, suspension swing arm; 2, pin shaft A; 3, flat washer A; 4, spring washer; 5, bolt; 6, oil cup; 7, split pin; 8, flat washer B; 9, shock absorber assembly; 10, pin shaft B; 11, shock pad; 12, nut; 13, sleeve. Specific embodiments
[0018] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.
[0019] As Figure 1 shown, the sleeve 13 and the suspension swing arm 1 are assembled into a suspension swing arm assembly, which is connected to the corresponding mounting hole on the vehicle frame through the pin shaft A 2. The suspension swing arm assembly can swing up and down relative to the vehicle frame through the pin shaft A 2, and the suspension swing arm assembly can rotate around the vehicle frame mounting seat. The pin shaft A 2 is fixed to the vehicle frame through the flat washer A 3, the spring washer 4 and the bolt 5. The oil cup 6 is installed on the pin shaft A 2, and the sleeve 13 can be lubricated by filling grease through the oil cup 6. The sleeve 13 is installed in the corresponding mounting hole of the suspension swing arm 1. The pin shaft A 2 is in clearance contact with the sleeve 13 directly. A layer of oil film is formed between the pin shaft A 2 and the sleeve 13 by the grease, reducing the friction between the pin shaft A 2 and the sleeve 13 when the suspension swing arm 1 swings. The shock absorber assembly 9 is connected to the corresponding mounting hole of the suspension swing arm through the pin shaft B 10. The split pin 7 is connected to the corresponding mounting hole of the pin shaft B 10 to prevent the pin shaft B 10 from coming out of the corresponding mounting hole of the shock absorber. The flat washer B 8 is installed on the pin shaft B 10, located between the split pin and the suspension swing arm connecting plate, preventing the split pin from wearing the suspension swing arm connecting plate. At the other end of the shock absorber assembly 9, it is connected to the vehicle frame mounting seat through the pin shaft B 10. The split pin 7 is connected to the corresponding mounting hole of the pin shaft B 10 to prevent the pin shaft B 10 from coming out of the corresponding mounting hole of the shock absorber. The flat washer B 8 is installed on the pin shaft B 10, located between the split pin and the vehicle frame mounting seat ear plate, preventing the split pin 7 from wearing the vehicle frame mounting seat ear plate. The shock absorber assembly 9, the suspension swing arm assembly and the vehicle frame form a box-shaped frame structure. The shock absorber assembly 9 is an elastic device composed of a spring and a damper. When the flatbed transporter passes through a bumpy road surface, the shock absorber assembly 9 can compress and rebound up and down, and the suspension swing arm 1 swings up and down around the pin shaft A 2 accordingly, thus playing a role in shock absorption and buffering for the vehicle. The shock pad 11 is connected to the vehicle frame through the nut 12, and the shock pad 11 and the vehicle frame are fixed. When the suspension swing arm 1 swings up and down, the limiting plate on the suspension swing arm 1 can contact the lower end surface of the shock pad 11, restricting the swing displacement of the suspension swing arm 1 within the deformation range of the shock absorber assembly 9, playing a safety protection role.
[0020] Embodiment 1:
[0021] As Figure 1As shown in the figure, there is a gap between the pin shaft A2 and the sleeve 13. The grease forms an oil film between the pin shaft A2 and the sleeve 13, reducing the friction between the pin shaft A2 and the sleeve 13 when the suspension swing arm swings up and down, ensuring that the suspension swing arm can swing freely relative to the vehicle frame. The pin shaft A2 is fixed relative to the vehicle frame. The flat washer A3, the spring washer 4 and the bolt 5 play a role in fixing the pin shaft A2. The sleeve 13 is embedded in the corresponding installation hole of the suspension swing arm 1 and is fixed relative to the suspension swing arm 1. The strength of the pin shaft A2 is sufficient to bear the weight of the cargo load transmitted to the vehicle frame through the suspension system. The shock absorption function of the shock absorber assembly 9 is achieved through the deformation and damping of its own spring, which has been verified by theoretical calculation and test. Moreover, the deformation characteristic curve of the spring is linear, which can meet the requirements of different load weights. The shock pad 11 is made of a material composed of rubber and metal. The shock pad 11 can be compressed and deformed, and has a certain strength and toughness, and can bear the impact of the weight within the rated vehicle load. The shock absorber assembly 9 is theoretically vertically installed with the suspension swing arm 1. The shock absorber assembly 9 can bear the vertical force of the load on the vehicle frame on the suspension system and can also bear a certain offload. The load on the vehicle frame is transmitted to the suspension swing arm 1 through the shock absorber assembly 9, and the suspension swing arm 1 transmits the load on the vehicle frame to the corresponding installation hole on the vehicle frame through the pin shaft A2.
[0022] Embodiment 2:
[0023] As Figure 1 shown in the figure, the suspension swing arm assembly can swing up and down relative to the vehicle frame through the pin shaft A2. The shock absorber assembly 9 can be compressed and rebound up and down. The shock absorber assembly 9 is connected between the suspension swing arm 1 and the vehicle frame through the pin shaft B10. The distance between the installation holes at both ends of the shock absorber assembly 9 can be shortened, driving the suspension swing arm to swing up and down relative to the vehicle frame.
[0024] The above description is only the preferred embodiment of the present application and the description of the technical principle and other solutions. At the same time, the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.
Claims
1. A suspension system for a flatbed truck, comprising a suspension swing arm (1), a pin shaft A (2), a flat washer A (3), a spring washer (4), a bolt (5), an oil cup (6), a cotter pin (7), a flat washer B (8), a shock absorber assembly (9), a pin shaft B (10), a shock absorbing pad (11), a nut (12) and a sleeve (13), wherein: The suspension swing arm (1) and the sleeve (13) are assembled into a suspension swing arm assembly, the suspension swing arm assembly is connected to a corresponding mounting hole on the vehicle frame via a pin shaft A (2), the pin shaft A (2) is fixed to the vehicle frame via a flat washer A (3), a spring washer (4) and a bolt (5), an oil cup (6) is installed on the pin shaft A (2), and the pin shaft A (2) is in direct contact with the sleeve (13) with a gap; The cotter pin (7) is connected to the corresponding mounting hole on the pin shaft B (10), and a plurality of flat washers B (8) are mounted on the pin shaft B (10). The flat washers B (8) are located between the cotter pin (7) and the suspension swing arm (1) and between the cotter pin (7) and the frame mounting seat ear plate. The cotter pin (7) is connected to the corresponding mounting hole on the pin shaft B (10); The shock absorber assembly (9) is connected to the corresponding mounting hole on the suspension swing arm (1) via a pin shaft B (10), and the other end of the shock absorber assembly (9) is connected to the frame mounting seat via a pin shaft B (10); The sleeve (13) is mounted on a corresponding mounting hole on the suspension swing arm (1), and the shock absorbing pad (11) is connected to the vehicle frame via a nut (12).
2. A suspension system for a flatbed truck according to claim 1, characterized in that: The shock absorber assembly (9), the suspension arm (1) and the vehicle frame form a box-type frame structure, and a limit plate is welded on the suspension arm (1).
3. The suspension system of a flatbed truck according to claim 1, characterized in that: The shock-absorbing pad (11) and the vehicle frame are fixed.
4. The suspension system of a flatbed truck according to claim 1, characterized in that: The pin A (2) is fixed relative to the frame.
5. The suspension system of a flatbed truck according to claim 1, characterized in that: The sleeve (13) is fixed relative to the suspension arm (1).
6. The suspension system of a flatbed truck according to claim 1, characterized in that: The shock-absorbing pad (11) is made of a combination of rubber and metal materials.
7. The suspension system of a flatbed truck according to claim 1, characterized in that: The shock absorber assembly (9) and the suspension swing arm (1) are theoretically installed vertically.