Three-point type light-load independent suspension assembly

Abstract

The three-point type light-load independent suspension assembly comprises a supporting plate, a bearing supporting assembly, a suspension support, a damping system, a braking system and a hub assembly, the supporting plate provides a supporting and mounting foundation for the whole suspension assembly, and a fixing base is fixedly arranged at the bottom of the supporting plate; the bearing supporting assembly is fixedly installed above the fixing base, the outer end of an inner shaft rod in the bearing supporting assembly is connected to the front lower end of the suspension support through a shaft, and the hub assembly is rotationally installed at the rear lower end of the suspension support. The damping system is mounted between the suspension bracket and the supporting plate; the brake system is installed at the top end of the suspension support, and the brake end of the brake system acts on the hub assembly. The independent suspension assembly is simple in structure and capable of meeting the requirement for bearing capacity of a light-load trailer, and independent suspension supporting of a semitrailer stock bin is achieved; meanwhile, the wheel damping effect is remarkable, the braking effect is good, and flexible control over the trailer can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a three-point light-load independent suspension assembly. Background Art

[0002] With the development of the transportation industry, semi-trailers have become increasingly popular due to their high transport efficiency, energy savings, and wide applicability. The suspension system on a semi-trailer, like the engine and transmission, is one of the three major components of a vehicle. Common suspension systems can be categorized as independent or non-independent. Existing trailers are designed to carry more cargo or meet specific load requirements, such as lowering the load surface to increase the load height. However, due to the low load floor, traditional axle structures cannot be used, so independent suspension systems are often used. Existing independent suspension systems feature a pivotal connection to the vehicle's suspension support at the end of the support guide plate facing away from the single-side axle shaft. The other end is connected to the trailer frame via a hydraulic cylinder and shock-absorbing springs. These hydraulic cylinders and shock-absorbing springs work together to provide support and shock absorption. However, their load-bearing capacity is poor, and their compatibility with a limited number of trailer models is limited. Therefore, further improvements are needed to meet the independent suspension requirements of light-load trailers. Summary of the Invention

[0003] The purpose of the present invention is to meet the independent suspension load-bearing requirements of light-load trailers, solve the problem of poor independent suspension load-bearing capacity in the above-mentioned existing background technology, and provide a three-point light-load independent suspension assembly.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a three-point light-load independent suspension assembly, including a support plate, a bearing support assembly, a suspension bracket, a shock absorption system, a brake system and a wheel hub assembly, wherein the support plate provides support and installation basis for the entire suspension assembly, and a fixed seat is fixedly provided at the bottom thereof. The above-mentioned bearing support assembly is fixedly installed above the fixed seat, and the outer end of the inner shaft therein is axially connected to the front lower end of the suspension bracket, and the wheel hub assembly is rotatably installed at the rear lower end of the suspension bracket; the above-mentioned shock absorption system is installed between the suspension bracket and the support plate; the brake system is installed at the top end of the suspension bracket, and its braking end acts on the above-mentioned wheel hub assembly.

[0005] Furthermore, the support plate is arranged vertically, and its bottom fixing seat is integrally formed with it, extending horizontally backward, and is provided with a plurality of bolt holes; the lower part of the front side wall of the support plate is also provided with connecting screw holes.

[0006] Furthermore, the bearing support assembly includes an outer sleeve, an inner shaft rod, a bearing shell, a sealing end cover and a fastening bolt. The outer sleeve is provided with an inner shaft cavity that passes through transversely; the inner shaft rod is coaxially rotated and inserted into the inner shaft cavity through the bearing shell, and its outer end extending out of the outer sleeve is axially connected to the front lower end of the above-mentioned suspension bracket, and its other end is coaxially fixed to the sealing end cover by a fastening bolt.

[0007] A fixed support and a connecting support are fixedly provided on the circumferential outer wall of the outer sleeve, which are positioned opposite to each other, wherein the fixed support includes a connecting plate and a fixed base plate, the connecting plate is fixedly connected between the outer sleeve and the fixed base plate, and the fixed base plate is provided with a plurality of mounting through holes corresponding to the bolt holes on the above-mentioned fixing support, which are fixed by bolt connection; the connecting support is arranged along the tangent length direction of the outer sleeve and is relatively perpendicular to it, and is provided with connecting through holes corresponding to the connecting screw holes on the above-mentioned support plate, which are fixed by bolt connection.

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

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

[0010] The auxiliary shock absorber includes a shock-absorbing hydraulic cylinder, one end of which 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; one end of the shock-absorbing hydraulic cylinder is installed on the support plate lower than the end installed on the suspension bracket.

[0011] Furthermore, the brake system includes a brake support seat, a brake air chamber, a brake rocker arm, a brake connecting rod, a brake adjustment arm and a brake shoe, wherein the brake support seat is fixedly installed at the rear of the above-mentioned top seat, and the brake air chamber is fixedly installed on the brake support seat; the above-mentioned brake rocker arm is an obtuse-angled rocker arm, and its middle corner is rotatably installed on the brake support seat through a support shaft, one end of which is hinged to the end of the piston rod of the above-mentioned brake air chamber, and the other end is hinged to one end of the brake connecting rod; the other end of the brake connecting rod is hinged to the brake adjustment arm, and the brake adjustment arm shaft is connected to a brake camshaft, and the brake camshaft extends into the wheel hub assembly, and the brake shoe is fixedly installed at its end, and the braking action acts on the wheel hub assembly.

[0012] Furthermore, the top end of the support plate is fixedly mounted on the vehicle frame; and an outer wheel guard plate is welded and fixed to the vertical edge of the support plate on the same side as the wheel hub assembly installation direction.

[0013] Furthermore, the shock absorption system includes a main shock absorption and a secondary shock absorption, wherein the main shock absorption includes a shock absorption airbag, one end of the shock absorption airbag is fixed to the upper rear side wall of the above-mentioned support plate, and the other end is fixedly connected to the top seat.

[0014] The auxiliary shock absorber is a secondary shock absorber, including a shock-absorbing hydraulic cylinder and a shock-absorbing sleeve. The lower end of the shock-absorbing sleeve is hinged to the connecting ear fixed on the rear side wall of the support plate, and the upper end is open and provided with an embedded docking cavity; the upper end of the shock-absorbing hydraulic cylinder is hinged to the connecting ear fixed on the front side of the suspension bracket, and the lower end extends into the docking cavity of the above-mentioned shock-absorbing sleeve, and a certain initial gap is left between it and the inner side wall of the docking cavity.

[0015] Furthermore, the support plate is a multi-section bent, integrally formed structure, and its top surface is parallel to the fixing seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the independent suspension assembly of the present invention has a simple structure, can meet the load-bearing capacity requirements of light-load trailers, and realize independent suspension support of semi-trailer silos; at the same time, the wheel shock absorption effect is significant, the braking effect is good, and can meet the flexible control of the trailer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the independent suspension assembly of the present invention;

[0018] Figure 2 is an isometric view of the independent suspension assembly of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the support plate in the present invention;

[0020] Figure 4 Schematic diagram of the structure of the suspension bracket in the present invention;

[0021] Figure 5 Schematic diagram of the structure of the bearing support assembly in the present invention;

[0022] Figure 6 A longitudinal center cross-sectional view of the bearing support assembly of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the brake system of the present invention;

[0024] Figure 8 A cross-sectional view of a second embodiment of the auxiliary shock absorber in the shock absorption system of the present invention;

[0025] In the figure: 1, support plate, 2, bearing support assembly, 3, suspension bracket, 4, damping system, 5, brake system, 6, hub assembly, 7, fixed seat, 8, top seat, 11, connecting lug, 12, connecting screw hole, 21, outer shaft sleeve, 22, inner shaft rod, 23, sealing end cover, 24, fastening bolt, 25, fixed support, 26, connecting support, 27, mounting hole, 28, connecting hole, 29, bearing, 31, first shaft hole, 32, second shaft hole, 41, damping air bag, 42, damping hydraulic cylinder, 43, damping sleeve, 44, butt joint cavity, 51, brake support seat, 52, brake chamber, 53, piston rod, 54, brake swing rod, 55, support shaft, 56, brake connecting rod, 57, brake adjusting arm, 61, wheel shaft. DETAILED DESCRIPTION

[0026] It should be noted that in the description of the present application, the terms such as "upper", "lower", "left", "right", "front", "back", "inner", "outer", "coaxial", "center", "opposite" and the like indicate the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the purpose of describing the structural relationship of the components in the present application, and does not specifically indicate that any component in the present application must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present application.

[0027] In addition, in the present application, descriptions such as "first", "second" and the like are only for descriptive purposes and are not intended to specifically indicate the order or sequence, nor to limit the present application, but merely to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features.

[0028] In the description of the present application, it should be noted that unless otherwise specifically specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, with the direction of vehicle travel as front:

[0030] Example 1,

[0031] As Figure 1 and Figure 2As shown, a three-point light-load independent suspension assembly includes a support plate 1, a bearing support assembly 2, a suspension bracket 3, a shock absorption system 4, a brake system 5 and a wheel hub assembly 6, wherein the support plate 1 is arranged vertically to provide support and installation foundation for the entire independent suspension assembly; Figure 3 As shown, the support plate 1 can be formed into a multi-section structure by stamping and bending a high-strength sheet metal plate, and its side projection is a "bow"-shaped multi-section bend to enhance the supporting strength of the entire support plate 1, and at the same time can adapt to the vehicle assembly requirements; the bottom of the support plate 1 is fixedly installed with a fixing seat 7, which is integrally formed with it. The fixing seat 7 extends horizontally backward and is provided with a plurality of bolt holes; the top end of the support plate 1 is bent and parallel to the above-mentioned fixing seat 7, and is mainly used for connecting and fixing to the bottom of the trailer frame. It can be welded or bolted. The direct connection between the support plate 1 and the frame can maintain the stability of the support plate 1.

[0032] The upper end surface of the fixed seat 7 is fixedly provided with a bearing support assembly 2. Figure 5 and Figure 6 As shown, the bearing support assembly 2 includes an outer sleeve 21, an inner shaft rod 22, a bearing shell 29, a sealing end cover 23 and a fastening bolt 24, wherein the outer sleeve 21 is provided with a coaxial inner shaft cavity which runs transversely through its length direction, and the inner shaft rod 22 is coaxially rotated and inserted into the inner shaft cavity through the bearing shell 29, and lubricating oil is applied between the two to ensure relatively smooth rotation and prevent wear; a coaxial sealing end cover 23 is added to the outer side of the left end of the inner shaft rod 22, and its diameter is larger than the diameter of the inner shaft cavity, and is directly fixed to the left end of the inner shaft rod 22 by a plurality of fastening bolts 24 to prevent the inner shaft rod 22 from being separated from the outer sleeve 21, and at the same time can seal the lubricating oil; the right end of the inner shaft rod 22 extends out of the outer sleeve 21, and its right end is arranged in a boss shape with an enlarged diameter.

[0033] A fixed support 25 and a connecting support 26 integrally formed therewith are fixedly arranged on the circumferential outer wall of the outer sleeve 21 in the bearing support assembly 2, and the two are arranged in relative positions. The fixed support 25 is located below the outer sleeve 21 and is composed of multiple connecting plates and a fixed base. The connecting plate is placed between the outer sleeve 21 and the fixed base, and is arranged in a trapezoidal shape. The top surface thereof is arc-shaped to fit the outer wall of the outer sleeve 21, and reinforcing ribs are provided between the multiple connecting plates; the fixed base is provided with multiple mounting through holes 27 corresponding to the bolt holes on the above-mentioned fixing seat 7. When the bearing support assembly 2 is installed on the fixing seat 7, it is connected and fixed by bolts passing through the corresponding bolt holes and the mounting through holes 27. The connecting support 26 is located above the outer sleeve 21 and is arranged along its tangential length direction and is relatively perpendicular to it. The connecting support 26 is provided with two horizontally penetrating connecting through holes 28. Correspondingly, the lower part of the above-mentioned support plate 1 is provided with two connecting screw holes 12. When the bearing support assembly 2 is fixed on the fixing seat 7, bolts are passed through the corresponding connecting through holes 28 and connecting screw holes 12 at the same time to connect the bearing support assembly 2 to the support plate 1 to improve the bearing capacity of the bearing support assembly 2.

[0034] The suspension bracket 3 is a triangular frame bracket structure. Figure 4 As shown, a first axial hole 31 is provided at the front lower end of the suspension bracket 3, a second axial hole 32 is provided at the rear lower end of the suspension bracket 3, and a third axial hole is provided at the upper end of the suspension bracket 3; the first axial hole 31 is coaxially connected to the outer end of the inner shaft 22 in the above-mentioned bearing support assembly 2 and is fixedly connected relative to it; the second axial hole 32 is axially connected to the wheel axle 61 of the above-mentioned wheel hub assembly 6; and a columnar top seat 8 is fixedly installed in the third axial hole.

[0035] The shock absorption system 4 is installed between the suspension bracket 3 and the support plate 1 and includes a primary shock absorber and a secondary shock absorber. The primary shock absorber includes a shock-absorbing airbag 41, one end of which is fixedly mounted to 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 to the rear side wall of the support plate 1, and the other end is hinged to a connecting lug fixed to 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.

[0036] The brake system 5 includes a brake support seat 51, a brake air chamber 52, a brake swing arm 54, a brake connecting rod 56, a brake adjustment arm 57 and a brake shoe, wherein the brake support seat 51 includes two side plates fixed to each other and a vertical plate, the two side plates are fixed parallel to the two side plates of the vertical plate, and are arranged in a U-shaped structure. The entire brake support seat 51 is fixedly installed at the rear of the top seat 8 through a supporting connecting rod; the brake air chamber 52 is fixedly installed at the front side of the vertical plate in the brake support seat 51 by bolts, and its piston rod 53 extends backward; the brake swing arm 5 4 is an obtuse-angled rocker arm, pivotally mounted between the two side plates of the brake support base 51 at its center corner via a support shaft 55. Its upper end is hingedly connected to the end of the piston rod 53 of the brake chamber 52 via a rod-end connector. Its lower end is hingedly connected to the upper end of a brake connecting rod 56. The lower end of the brake connecting rod 56 is hingedly connected to a brake adjustment arm 57. The braking end of the brake adjustment arm 57 is axially connected to a brake camshaft. The brake camshaft extends perpendicularly to the brake adjustment arm 57 and extends into the interior of the wheel hub assembly 6. A brake shoe is fixedly mounted at its end, applying the braking force to the wheel hub assembly 6. During operation, the brake adjustment arm 57 converts the thrust from the brake chamber 52 into a torque that opens the brake shoe, thereby rotating the brake hub assembly 6. It also adjusts the gap between the brake shoe and the brake drum, ensuring that the brake system 5 is always in good working condition.

[0037] When the above-mentioned independent suspension assembly is assembled to a light-load trailer, the top end of the above-mentioned support plate 1 is bent and fixedly connected to the bottom of the frame body on both sides of the trailer frame; the vertical edge of the support plate 1 on the same side as the installation direction of the wheel hub assembly 6 is welded and fixed to the outer wheel guard plate to increase the installation stability of the entire suspension assembly.

[0038] After the above-mentioned independent suspension assembly is assembled to the trailer frame, when the trailer carries cargo, the weight of the cargo acts on the frame and is transmitted to the above-mentioned support plate 1, giving the support plate 1 a downward force, and the fixing seat 7 fixed thereto is also subjected to a downward force; at the same time, the wheel contacts the ground, acting on the wheel hub assembly 6 and the suspension bracket 3, and the suspension bracket 3 has an upward force, and the bearing support assembly 2 axially connected thereto is also subjected to an upward force, causing the bearing support assembly 2 and the above-mentioned fixing seat 7 to separate back to back, and the bolts used to connect and fix the two will also be subjected to a pulling force; at the same time, 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 the light-loaded trailer.

[0039] Example 2,

[0040] A three-point light-load independent suspension assembly 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. Its overall structural composition is substantially the same as the technical solution described in the above-mentioned embodiment 1. The difference between the two is that the shock absorption system 4 includes a main shock absorption and a secondary shock absorption, wherein the main shock absorption includes a shock-absorbing airbag 41, one end of the shock-absorbing airbag 41 is fixedly mounted on the upper rear side wall of the above-mentioned support plate 1, and the other end thereof is fixedly connected to the above-mentioned top seat 8.

[0041] The auxiliary shock absorption is a secondary shock absorption, such as Figure 8 As shown, it includes a shock-absorbing hydraulic cylinder 42 and a shock-absorbing sleeve 43. The lower end of the shock-absorbing sleeve 43 is hinged to the connecting ear 11 fixed on the rear side wall of the above-mentioned support plate 1, and the upper end thereof is open and provided with an embedded docking cavity 44 along its length direction; the upper end of the shock-absorbing hydraulic cylinder 42 is hinged to the connecting ear fixed on the front side of the suspension bracket 3, and the lower end thereof extends into the docking cavity 44 of the above-mentioned shock-absorbing sleeve 43, and a certain initial gap is left between the inner end side of the docking cavity 44.

[0042] During the operation of the trailer, the first thing that works in the shock-absorbing system 4 is the shock-absorbing airbag 41 in the main shock-absorbing body. At this time, the lower end of the shock-absorbing hydraulic cylinder 42 in the auxiliary shock-absorbing body does not contact the inner wall of the docking cavity 44 of the shock-absorbing sleeve 43; when the shock-absorbing pressure carried by the shock-absorbing airbag 41 reaches the preset value, the shock-absorbing hydraulic cylinder 42 in the auxiliary shock-absorbing body is squeezed, and its lower end contacts the inner end surface of the docking cavity 44, and the shock-absorbing hydraulic cylinder 42 performs the shock-absorbing effect synchronously, thereby jointly achieving the shock-absorbing effect.

[0043] The relevant technical features that have not been described in detail in the above embodiments can be achieved by adopting or drawing on relevant technical solutions in the existing technology.

[0044] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A three-point light-load independent suspension assembly, characterized by: It includes a support plate, a bearing support assembly, a suspension bracket, a shock absorbing system, a brake system and a wheel hub assembly, wherein the support plate provides support and installation basis for the entire suspension assembly, and a fixed seat is fixedly provided at the bottom thereof. The above-mentioned bearing support assembly is fixedly installed above the fixed seat, and the outer end of the inner shaft therein is axially connected to the front lower end of the suspension bracket, and the wheel hub assembly is rotatably installed on the rear lower end of the suspension bracket; the above-mentioned shock absorbing system is installed between the suspension bracket and the support plate; the brake system is installed at the top end of the suspension bracket, and its braking end acts on the above-mentioned wheel hub assembly.

2. The three-point light-load independent suspension assembly according to claim 1, characterized in that: The support plate is arranged vertically, and its bottom fixing seat is integrally formed with it, extending horizontally backward, and is provided with a plurality of bolt holes; the lower part of the front side wall of the support plate is also provided with connecting screw holes.

3. The three-point light-load independent suspension assembly according to claim 2, characterized in that: The bearing support assembly includes an outer sleeve, an inner shaft, a bearing bush, a sealing end cover, and a fastening bolt. The outer sleeve is provided with an inner shaft cavity extending transversely therethrough. The inner shaft is coaxially rotatably inserted into the inner shaft cavity via the bearing bush. The outer end of the inner shaft extending out of the outer sleeve is axially connected to the front lower end of the suspension bracket, and the other end is coaxially fixed to the sealing end cover via the fastening bolt. A fixed support and a connecting support are fixedly provided on the circumferential outer wall of the outer sleeve, which are positioned opposite to each other, wherein the fixed support includes a connecting plate and a fixed base plate, the connecting plate is fixedly connected between the outer sleeve and the fixed base plate, and the fixed base plate is provided with a plurality of mounting through holes corresponding to the bolt holes on the above-mentioned fixing support, which are fixed by bolt connection; the connecting support is arranged along the tangent length direction of the outer sleeve and is relatively perpendicular to it, and is provided with connecting through holes corresponding to the connecting screw holes on the above-mentioned support plate, which are fixed by bolt connection.

4. The three-point light-load independent suspension assembly according to claim 1, characterized in that: The suspension bracket is a triangular frame bracket structure, and a first axial hole is provided at its front lower end, which is axially connected to the outer end of the inner shaft in the above-mentioned bearing support assembly; a second axial hole is provided at its rear lower end, which is axially connected to the wheel axle of the above-mentioned wheel hub assembly; a third axial hole is provided at the upper end of the suspension bracket, on which a top seat is fixedly installed.

5. The three-point light-load independent suspension assembly according to claim 4, characterized in that: The shock absorption system includes a main shock absorption and an auxiliary shock absorption, wherein the main shock absorption includes a shock absorption airbag, one end of the shock absorption airbag is fixed to the upper rear side wall of the above-mentioned support plate, and the other end thereof is fixedly connected to the top seat; The auxiliary shock absorber includes a shock-absorbing hydraulic cylinder, one end of which 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; one end of the shock-absorbing hydraulic cylinder is installed on the support plate lower than the end installed on the suspension bracket.

6. The three-point light-load independent suspension assembly according to claim 4, characterized in that: The brake system includes a brake support seat, a brake air chamber, a brake rocker arm, a brake connecting rod, a brake adjustment arm and a brake shoe, wherein the brake support seat is fixedly installed at the rear of the above-mentioned top seat, and the brake air chamber is fixedly installed on the brake support seat; the above-mentioned brake rocker arm is an obtuse-angled rocker arm, and its middle corner is rotatably installed on the brake support seat through a support shaft, one end of which is hinged to the end of the piston rod of the above-mentioned brake air chamber, and the other end is hinged to one end of the brake connecting rod; the other end of the brake connecting rod is hinged to the brake adjustment arm, and the brake adjustment arm shaft is connected to the brake camshaft, the brake camshaft extends into the wheel hub assembly, and the brake shoe is fixedly installed at its end, and the braking action acts on the wheel hub assembly.

7. The three-point light-load independent suspension assembly according to claim 1, characterized in that: The top end of the support plate is fixedly mounted on the vehicle frame; an outer wheel protection plate is welded and fixed to the vertical edge of the support plate on the same side as the wheel hub assembly installation direction.

8. The three-point light-load independent suspension assembly according to claim 4, characterized in that: The shock absorption system includes a main shock absorption and an auxiliary shock absorption, wherein the main shock absorption includes a shock absorption airbag, one end of the shock absorption airbag is fixed to the upper rear side wall of the above-mentioned support plate, and the other end thereof is fixedly connected to the top seat; The auxiliary shock absorber is a secondary shock absorber, including a shock-absorbing hydraulic cylinder and a shock-absorbing sleeve. The lower end of the shock-absorbing sleeve is hinged to the connecting ear fixed on the rear side wall of the support plate, and the upper end is open and provided with an embedded docking cavity; the upper end of the shock-absorbing hydraulic cylinder is hinged to the connecting ear fixed on the front side of the suspension bracket, and the lower end extends into the docking cavity of the above-mentioned shock-absorbing sleeve, and a certain initial gap is left between it and the inner side wall of the docking cavity.

9. The three-point light-load independent suspension assembly according to claim 1, characterized in that: The support plate is a multi-section bent, integrally formed structure, and its top surface is parallel to the fixing seat.

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