A light-duty independent suspension

Abstract

This utility model discloses a light-load independent suspension, including a support plate, a bearing support assembly, a suspension bracket, a shock absorption system, a braking system, and a wheel hub assembly. The support plate is vertically arranged, with a fixed base at its bottom. The bearing support assembly is fixedly installed above the fixed base, with its inner shaft shaft connected to the lower front end of the suspension bracket. The wheel hub assembly is rotatably mounted on the lower rear end of the suspension bracket. The shock absorption system, including a main shock absorber and a secondary shock absorber, is installed between the suspension bracket and the support plate. The braking system is installed at the top of the suspension bracket, and its braking end acts on the wheel hub assembly. The independent suspension structure of this utility model is simple, can meet the load-bearing capacity requirements of light-load trailers, and achieves independent suspension support for the semi-trailer's cargo bin. Simultaneously, it provides significant wheel shock absorption and good braking performance, enabling flexible control of the trailer.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, specifically to a light-load independent suspension. Background Technology

[0002] With the development of the transportation industry, semi-trailers have been increasingly adopted due to their high transportation efficiency, energy saving, and strong applicability. The suspension system of a semi-trailer, like the engine and transmission, is one of the three major components of a vehicle; common suspensions can be divided into independent suspension systems and non-independent suspension systems. Some existing trailers are designed to carry more cargo or meet specific load requirements, such as lowering the load-bearing surface to increase cargo height. Because of the low cargo floor, traditional axle structures cannot be used, so independent suspension systems are often employed. Existing independent suspension systems have a support guide plate that is rotatably connected to the vehicle's suspension bracket at the end away from one half-shaft, and the other side connected to the trailer frame via hydraulic cylinders and shock absorbers. The hydraulic cylinders and shock absorbers work together to provide support and damping. However, their load-bearing capacity is poor, and the types of trailers they can adapt to are limited. Therefore, further improvements to independent suspension systems are needed to meet the independent suspension requirements of light-duty trailers. Utility Model Content

[0003] The purpose of this utility model is to meet the load-bearing requirements of independent suspension for light-load trailers, solve the problem of poor load-bearing capacity of independent suspension in the prior art, and provide a light-load independent suspension.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a light-load independent suspension, including a support plate, a bearing support assembly, a suspension bracket, a shock absorption system, a braking system, and a wheel hub assembly. The support plate is vertically arranged, and a fixed seat is fixedly provided at its bottom. The bearing support assembly is fixedly installed above the fixed seat, and the outer end of its inner shaft is axially connected to the lower front end of the suspension bracket. The wheel hub assembly is rotatably installed at the lower rear end of the suspension bracket. The shock absorption system is installed between the suspension bracket and the support plate, and includes a main shock absorber and a secondary shock absorber. The braking system is installed at the top of the suspension bracket, and its braking end acts on the wheel hub assembly.

[0005] Furthermore, the support plate adopts a multi-segment bending structure formed by sheet metal stamping, and its bottom fixing seat is integrally formed with it, extending horizontally backward. The fixing seat is provided with multiple bolt holes; the lower part of the support plate is also provided with multiple connecting screw holes.

[0006] Furthermore, the bearing support assembly includes an outer bushing, an inner shaft, a bearing bush, a sealing end cap, and fastening bolts. The outer bushing has a transversely penetrating inner shaft cavity. The inner shaft is coaxially rotatably inserted into the inner shaft cavity through the bearing bush, and its outer end extending out of the outer bushing is axially connected to the lower front end of the suspension bracket. Its other end is coaxially fixed to the sealing end cap through the fastening bolts.

[0007] The outer bushing has a fixed support and a connecting support fixedly positioned opposite each other on its circumferential outer wall. The fixed support includes a connecting plate and a fixed base plate. The connecting plate is fixedly connected between the outer bushing and the fixed base plate. The fixed base plate has multiple mounting through holes corresponding to the bolt holes on the fixed support, and is fixed by bolts. The connecting support is arranged along the tangent length direction of the outer bushing and is perpendicular to it. It has connecting through holes corresponding to the connecting screw holes on the support plate, and is fixed by bolts.

[0008] Furthermore, the suspension bracket has a triangular frame bracket structure, with a first shaft hole at its lower front end, which is connected to the outer end of the inner shaft in the bearing support assembly; a second shaft hole at its lower rear end, which is connected to the wheel axle of the hub assembly; and a third shaft hole at the upper end of the suspension bracket, where a top seat is fixedly installed.

[0009] Furthermore, the main shock absorber in the shock absorption system includes a shock absorber airbag, one end of which is fixed to the upper rear side wall of the support plate, and the other end of which is fixedly connected to the top seat.

[0010] Furthermore, the secondary damping system in the shock absorption system includes a damping hydraulic cylinder. One end of the damping hydraulic cylinder is hinged to a connecting lug fixed on the rear side wall of the support plate, and the other end is hinged to a connecting lug fixed on the front side of the suspension bracket. The end of the damping hydraulic cylinder installed on the support plate is lower than the end installed on the suspension bracket.

[0011] Furthermore, the braking system includes a brake support seat, a brake chamber, a brake lever, a brake linkage, a brake adjusting arm, and brake shoes. The brake support seat is fixedly installed behind the aforementioned top seat. The brake chamber is fixedly installed on the brake support seat, with its piston rod extending rearward. The brake lever is an obtuse-angled lever, with its middle corner rotatably mounted on the brake support seat via a support shaft. One end of the lever is hinged to the end of the piston rod of the aforementioned brake chamber, and the other end is hinged to one end of the brake linkage. The other end of the brake linkage is hinged to the brake adjusting arm, which is shaft-connected to a brake camshaft. The brake camshaft extends into the wheel hub assembly, and its end is fixedly fitted with a brake shoe, which applies braking action to the wheel hub assembly.

[0012] Furthermore, the top of the support plate is fixedly installed to the bottom of the trailer frame; an outer wheel protection plate is welded and fixed to the vertical side of the support plate on the same side as the wheel hub assembly installation direction.

[0013] Compared with the prior art, the present invention has the following advantages: The independent suspension structure of the present invention is simple and can meet the load-bearing capacity requirements of light-load trailers, and realize independent suspension support for the semi-trailer hopper; at the same time, the wheel shock absorption effect is significant and the braking effect is good, which can meet the flexible control of the trailer. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the independent suspension of this utility model;

[0015] Figure 2 This is an isometric side view of the independent suspension of this utility model;

[0016] Figure 3 This is a schematic diagram of the support plate in this utility model;

[0017] Figure 4 This is a schematic diagram of the suspension bracket in this utility model;

[0018] Figure 5 This is a schematic diagram of the bearing support assembly in this utility model;

[0019] Figure 6 This is a longitudinal center sectional view of the bearing support assembly in this utility model;

[0020] Figure 7 This is a schematic diagram of the braking system in this utility model;

[0021] In the diagram: 1. Support plate, 2. Bearing support assembly, 3. Suspension bracket, 4. Shock absorption system, 5. Braking system, 6. Wheel hub assembly, 7. Fixed seat, 8. Top seat, 11. Connecting lug, 12. Connecting bolt hole, 21. Outer bushing, 22. Inner shaft, 23. Sealing end cap, 24. Fastening bolt, 25. Fixed support, 26. Connecting support, 27. Mounting through hole, 28. Connecting through hole, 29. Bearing shell, 31. First shaft hole, 32. Second shaft hole, 41. Shock absorber airbag, 42. Shock absorber hydraulic cylinder, 51. Brake support seat, 52. Brake chamber, 53. Piston rod, 54. Brake swing arm, 55. Support shaft, 56. Brake connecting rod, 57. Brake adjusting arm, 61. Wheel axle. Detailed Implementation

[0022] It should be noted that in the description of this utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "coaxial", "center", and "relative" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only used to facilitate the description of the structural relationship between the components in this utility model and do not specifically mean that any component in this utility model must have a specific orientation, be constructed and operated in a specific orientation, or be construed as a limitation on this utility model.

[0023] Furthermore, in utility models, descriptions such as "first" and "second" are for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, taking the vehicle's direction of travel as forward:

[0026] like Figure 1 and Figure 2 As shown, a light-load independent suspension includes a support plate 1, a bearing support assembly 2, a suspension bracket 3, a shock absorption system 4, a braking system 5, and a wheel hub assembly 6. The support plate 1 is vertically arranged, providing support and a mounting foundation for the entire independent suspension device. Figure 3 As shown, the support plate 1 is made of high-strength sheet metal, stamped and bent into a multi-segment structure. Its side projection is a "bow"-shaped multi-segment bend to enhance the overall support strength of the support plate 1 and adapt to vehicle assembly requirements. A fixing seat 7 is fixedly installed at the bottom of the support plate 1, integrally formed with it. The fixing seat 7 extends horizontally backward and has multiple bolt holes. The top bend of the support plate 1 is parallel to the fixing seat 7 and is mainly used to connect and fix it to the bottom of the trailer frame. It can be fixed by welding or bolting. The direct connection between the support plate 1 and the frame can maintain the stability of the support plate 1.

[0027] A bearing support assembly 2 is fixedly installed on the upper end face of the fixed base 7, combined with Figure 5 and Figure 6 As shown, the bearing support assembly 2 includes an outer bushing 21, an inner shaft 22, a bearing shell 29, a sealing end cap 23, and fastening bolts 24. The outer bushing 21 has a coaxial inner shaft cavity that extends transversely through its length. The inner shaft 22 is coaxially rotatably inserted into the inner shaft cavity through the bearing shell 29. Lubricating oil is applied between the two to ensure relatively smooth rotation and prevent wear. A coaxial sealing end cap 23 is added to the outer side of the left end of the inner shaft 22. Its diameter is larger than the diameter of the inner shaft cavity. It is directly fixed to the left end of the inner shaft 22 by multiple fastening bolts 24 to prevent the inner shaft 22 from detaching from the outer bushing 21 and to seal the lubricating oil. The right end of the inner shaft 22 extends out of the outer bushing 21 and is provided as a boss with a larger diameter.

[0028] The bearing support assembly 2 has an integrally formed fixed support 25 and a connecting support 26 fixed on the outer circumferential outer wall of the outer bushing 21. The two are positioned opposite each other. The fixed support 25 is located below the outer bushing 21 and consists of multiple connecting plates and a fixed base. The connecting plates are placed between the outer bushing 21 and the fixed base and are arranged in a trapezoidal shape with an arc-shaped top surface to fit the outer side wall of the outer bushing 21. Reinforcing ribs are provided between the multiple connecting plates. The fixed base has multiple mounting through holes 27 corresponding to the bolt holes on the fixed base 7. When the bearing support assembly 2 is installed on the fixed base 7, it is connected and fixed by bolts passing through the corresponding bolt holes and mounting through holes 27. The connecting support 26 is located above the outer bushing 21 and is set along its tangential length direction, perpendicular to it. The connecting support 26 has two transverse through holes 28. Correspondingly, the lower part of the support plate 1 has two connecting screw holes 12. When the bearing support assembly 2 is fixed on the fixed base 7, the bearing support assembly 2 is connected to the support plate 1 by bolts passing through the corresponding through holes 28 and connecting screw holes 12, so as to improve the bearing capacity of the bearing support assembly 2.

[0029] The suspension bracket 3 has a triangular frame bracket structure, as shown in the reference... Figure 4 As shown, a first shaft hole 31 is provided at the lower front end of the suspension bracket 3, a second shaft hole 32 is provided at the lower rear end of the suspension bracket 3, and a third shaft hole is provided at the upper end of the suspension bracket 3; the first shaft hole 31 is coaxially connected to the outer end of the inner shaft 22 in the bearing support assembly 2, and is fixedly connected to it; the second shaft hole 32 is connected to the wheel axle 61 of the hub assembly 6; and a columnar top seat 8 is fixedly installed in the third shaft hole.

[0030] The aforementioned shock absorption system 4 is installed between the suspension bracket 3 and the support plate 1, and includes a main shock absorber and a secondary shock absorber. The main shock absorber includes a shock-absorbing airbag 41, one end of which is fixedly installed on the upper rear side wall of the support plate 1, and the other end is fixedly connected to the top seat 8. The secondary shock absorber includes a shock-absorbing hydraulic cylinder 42, the lower end of which is hinged to a connecting lug 11 fixed on the rear side wall of the support plate 1, and the other end is hinged to a connecting lug fixed on the front side of the suspension bracket 3. The end of the shock-absorbing hydraulic cylinder 42 installed on the support plate 1 is lower than the end installed on the suspension bracket 3.

[0031] The aforementioned braking system 5 includes a brake support 51, a brake chamber 52, a brake lever 54, a brake linkage 56, a brake adjusting arm 57, and brake shoes. The brake support 51 comprises two side plates fixed to each other and a vertical plate. The two side plates are parallel to and fixed to the two side plates of the vertical plate, forming a U-shaped structure. The entire brake support 51 is fixedly installed behind the aforementioned top seat 8 via a support linkage. The brake chamber 52 is bolted to the front side of the vertical plate of the aforementioned brake support 51, and its piston rod 53 extends rearward. The aforementioned brake lever 54... 4 is an obtuse-angled rocker arm, with its central corner rotatably mounted between two side plates in the brake support seat 51 via a support shaft 55. Its upper end is hinged to the end of the piston rod 53 of the brake chamber 52 via a rod end connector, and its lower end is hinged to the upper end of the brake link 56. The lower end of the brake link 56 is hinged to the brake adjusting arm 57. The brake camshaft is axially connected to the brake adjusting arm 57, which is perpendicular to the brake adjusting arm 57 and extends into the interior of the wheel hub assembly 6. A brake shoe is fixedly mounted at its end, and the braking action is applied to the wheel hub assembly 6. During operation, the brake adjusting arm 57 converts the thrust of the brake chamber 52 into a torque that opens the brake shoe, thereby achieving the rotation of the brake wheel hub assembly 6. Furthermore, it also has the function of adjusting the clearance between the brake shoe and the brake drum, ensuring that the brake system 5 is always in good working condition.

[0032] When the aforementioned independent suspension is assembled onto a light-load trailer, the top of the aforementioned support plate 1 is bent and fixedly connected to the bottom of the main frame body on both sides of the trailer frame; the vertical side of the support plate 1 that is on the same side as the installation direction of the wheel hub assembly 6 is welded and fixed to the outer wheel protection plate to increase the installation stability of the entire suspension device.

[0033] After the aforementioned independent suspension is assembled to the trailer frame, when the trailer is carrying cargo, the weight of the cargo acts on the frame and is transmitted to the aforementioned support plate 1, giving the support plate 1 a downward force. The fixing seat 7, which is fixed to it, also experiences a downward force. At the same time, the wheels contact the ground, acting on the wheel hub assembly 6 and the suspension bracket 3. The suspension bracket 3 experiences an upward force, and the bearing support assembly 2, which is axled to it, also experiences an upward force, causing the bearing support assembly 2 and the aforementioned fixing seat 7 to separate in opposite directions. The bolts used to connect and fix the two will also experience a tensile force. Meanwhile, the bearing support assembly 2 is also fixed to the support plate 1 by bolts, providing a lateral fixing force that can adapt to the load capacity of light-load trailers.

[0034] The relevant technical features not described or mentioned in detail in the above embodiments can be achieved by adopting or referencing relevant technical solutions in the existing technology.

[0035] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A light-duty independent suspension characterized by: The system includes a support plate, a bearing support assembly, a suspension bracket, a shock absorption system, a braking system, and a wheel hub assembly. The support plate is vertically oriented and has a fixed base at its bottom. The bearing support assembly is fixedly installed above the fixed base, and its inner shaft is axially connected to the lower front end of the suspension bracket. The wheel hub assembly is rotatably mounted on the lower rear end of the suspension bracket. The shock absorption system is installed between the suspension bracket and the support plate and includes a main shock absorber and a secondary shock absorber. The braking system is installed at the top of the suspension bracket, and its braking end acts on the wheel hub assembly.

2. A light-duty independent suspension as claimed in claim 1 wherein: The support plate adopts a multi-segment bending structure formed by sheet metal stamping, and its bottom fixing seat is integrally formed with it, extending horizontally backward. The fixing seat is provided with multiple bolt holes; the lower part of the support plate is also provided with multiple connecting screw holes.

3. A low-load independent suspension according to claim 2, wherein: The bearing support assembly includes an outer bushing, an inner shaft, a bearing bush, a sealing end cap, and fastening bolts. The outer bushing has a transversely penetrating inner shaft cavity. The inner shaft is coaxially rotatably inserted into the inner shaft cavity through the bearing bush. Its outer end extending out of the outer bushing is axially connected to the lower front end of the suspension bracket, and its other end is coaxially fixed to the sealing end cap through fastening bolts. The outer bushing has a fixed support and a connecting support fixedly positioned opposite each other on its circumferential outer wall. The fixed support includes a connecting plate and a fixed base plate. The connecting plate is fixedly connected between the outer bushing and the fixed base plate. The fixed base plate has multiple mounting through holes corresponding to the bolt holes on the fixed support, and is fixed by bolts. The connecting support is arranged along the tangent length direction of the outer bushing and is perpendicular to it. It has connecting through holes corresponding to the connecting screw holes on the support plate, and is fixed by bolts.

4. A low-load independent suspension according to claim 1, wherein: The suspension bracket has a triangular frame structure, with a first shaft hole at its lower front end, which is connected to the outer end of the inner shaft of the bearing support assembly; a second shaft hole at its lower rear end, which is connected to the wheel axle of the hub assembly; and a third shaft hole at the upper end of the suspension bracket, where a top seat is fixedly installed.

5. A low-load independent suspension according to claim 4, wherein: The main shock absorber in the shock absorption system includes a shock absorber airbag. One end of the shock absorber airbag is fixed to the upper rear side wall of the support plate, and the other end is fixedly connected to the top seat.

6. A low-load independent suspension according to claim 4, wherein: The damping system includes a damping hydraulic cylinder. One end of the damping hydraulic cylinder is hinged to a connecting lug fixed on the rear side wall of the support plate, and the other end is hinged to a connecting lug fixed on the front side of the suspension bracket. The end of the damping hydraulic cylinder installed on the support plate is lower than the end installed on the suspension bracket.

7. A low rate independent suspension as in claim 4, wherein: The braking system includes a brake support seat, a brake chamber, a brake lever, a brake linkage, a brake adjusting arm, and brake shoes. The brake support seat is fixedly installed behind the aforementioned top seat. The brake chamber is fixedly installed on the brake support seat, with its piston rod extending rearward. The brake lever is an obtuse-angled lever, with its middle corner rotatably mounted on the brake support seat via a support shaft. One end of the lever is hinged to the end of the piston rod of the aforementioned brake chamber, and the other end is hinged to one end of the brake linkage. The other end of the brake linkage is hinged to the brake adjusting arm, which is shaft-connected to a brake camshaft. The brake camshaft extends into the wheel hub assembly, and its end is fixedly fitted with a brake shoe, which applies braking action to the wheel hub assembly.

8. A low-load independent suspension according to claim 1 wherein: The top of the support plate is fixedly installed to the bottom of the trailer frame; an outer wheel protection plate is welded and fixed to the vertical side of the support plate on the same side as the wheel hub assembly installation direction.

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