Light-weight, low-gravity-center and stress-dispersed rubber suspension assembly

Abstract

The utility model relates to the technical field of automobile suspensions, in particular to a light-weight, low-gravity-center and stress-dispersed rubber suspension assembly which comprises a balance beam assembly, the middle of the balance beam assembly extends upwards to form a trapezoid protrusion, and a trapezoid installation lower plate is fixedly installed on the top face of the trapezoid protrusion. The rubber main springs are symmetrically installed on the upper surfaces of the two ends of the trapezoidal installation lower plate, the upper cover body is installed at the top connecting the two rubber main springs, the two rubber main springs support the upper cover body in an inverted V shape, the upper cover body is directly connected with a vehicle frame, the rubber auxiliary spring is fixedly installed in the center of the lower surface of the bottom of the upper cover body, and the height of the rubber auxiliary spring is smaller than that of the rubber main springs. A limiting device is mounted between the upper cover body and the equalizing beam assembly; the gravity center of the rubber main spring moves downwards, the rubber main spring moves towards the two sides, stress points of the balance beam assembly are dispersed from the center point to the two sides, the rubber main spring supports the upper cover body in an inverted V shape, the bearing requirement of the rubber suspension is met, the assembly structure is optimized, and the service life is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension technology, and in particular to a lightweight rubber suspension assembly with a low center of gravity and distributed stress. Background Technology

[0002] Commercial vehicle chassis suspensions are categorized into leaf spring suspensions, air suspensions, and rubber suspensions based on their structure and damping components. Currently, over 90% of commercial vehicle chassis suspensions in China use leaf spring suspensions. With the increasing emphasis on stricter regulations on overloading and lightweighting of vehicles, air suspensions are gradually being used and promoted in domestic commercial vehicle chassis. However, due to their higher cost, widespread adoption of air suspensions in China will take time. Rubber suspensions, combining lightweight and cost advantages, have seen increased adoption and use in domestic commercial vehicle chassis in recent years. Commonly available rubber suspensions mainly consist of a saddle support assembly, a balance beam assembly, and components such as rubber springs, shock absorbers, and auxiliary springs.

[0003] Utility model patent CN 218140925 U discloses a lightweight, high-strength rubber suspension system. While it optimizes the overall structure and reduces the weight of the suspension assembly, this system employs a V-shaped structure. The lower ends of the rubber main springs on both sides are inclined towards the center of the balance beam, resulting in a high center of gravity and concentrating the stress point at a single point on the balance beam. This single-point stress distribution can lead to excessive load on the center of the balance beam over long-term use. Furthermore, the internal structure of the rubber main springs often uses planar supports or single-sided supports. The disadvantage of this structure is that the external force cannot be evenly distributed within the internal supports, acting only at a specific point, increasing the risk of cracking between the rubber and the supports. Frequent compression and heavy loads also limit its service life. Therefore, there is still room for further structural optimization of the rubber suspension assembly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lightweight rubber suspension assembly with a lower V-shaped structure, long service life, low center of gravity, and distributed stress.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: It includes a balance beam assembly, the middle of which extends upward to form a trapezoidal protrusion. A trapezoidal mounting plate is fixedly installed on the top surface of the trapezoidal protrusion. Rubber main springs are symmetrically installed on the upper surfaces of both ends of the trapezoidal mounting plate. An upper cover is installed on the top connecting the two rubber main springs, and the two rubber main springs form an inverted V-shaped support for the upper cover. The upper cover is directly connected to the vehicle frame. A rubber auxiliary spring is fixedly installed at the center of the bottom lower surface of the upper cover, located between the two rubber main springs. The height of the rubber auxiliary spring is less than the height of the rubber main springs. A limiting device is installed between the upper cover and the balance beam assembly.

[0006] As a preferred technical solution, the rubber main spring includes a top bowl-shaped bracket and a bottom bowl-shaped bracket, with two or more intermediate bowl-shaped brackets between the top and bottom bowl-shaped brackets. The top, bottom, and intermediate bowl-shaped brackets have the same curvature and equal spacing. A top rubber block is integrally vulcanized between the top bowl-shaped bracket and its adjacent intermediate bowl-shaped bracket. An intermediate rubber block is integrally vulcanized between two adjacent intermediate bowl-shaped brackets. A bottom rubber block is integrally vulcanized between the bottom bowl-shaped bracket and its adjacent intermediate bowl-shaped bracket.

[0007] As a preferred technical solution, the top bowl-shaped bracket includes a top square plate, the four corners of which are provided with mounting holes, the lower surface of the top square plate extends downward in an arc from the center to provide a bowl-shaped surrounding bracket, the bowl-shaped surrounding bracket has a top horizontal flange at the bowl opening, and multiple reinforcing ribs are provided between the top square plate and the top horizontal flange.

[0008] The bottom bowl-shaped support includes a bottom square plate, with mounting holes at the four corners of the bottom square plate, and a bowl-shaped surrounding bracket that is bent upwards and protrudes from the middle of the bottom square plate.

[0009] The intermediate bowl-shaped support includes a bowl-shaped spacer support, and the bowl-shaped spacer support has a middle horizontal flange at the rim, the middle horizontal flange being the same in shape and size as the top horizontal flange.

[0010] As a preferred technical solution, the top rubber block includes a top rubber body adapted to the bowl-shaped surrounding bracket, the lower part of the top rubber body is provided with a top rubber horizontal flange, the top rubber horizontal flange is inclined to one side by 10° to 30°; the middle rubber block includes a middle rubber body adapted to the bowl-shaped spacer bracket, the lower part of the middle rubber body is provided with a middle rubber horizontal flange, the middle rubber horizontal flange is inclined to one side by 10° to 30°; the bottom rubber block includes a bottom rubber body adapted to the bowl-shaped surrounding bracket, the lower part of the bottom rubber body is provided with a bottom rubber horizontal flange, the bottom rubber horizontal flange is inclined to one side by 10° to 30°, and the inclination directions of the top rubber horizontal flange, the middle rubber horizontal flange and the bottom rubber horizontal flange are consistent.

[0011] As a preferred technical solution, the top rubber horizontal flange is tilted to one side by 20°; the middle rubber horizontal flange is tilted to one side by 20°; and the bottom rubber horizontal flange is tilted to one side by 20°.

[0012] As a preferred technical solution, the rubber auxiliary spring includes an auxiliary spring mounting plate, the auxiliary spring mounting plate is provided with mounting holes, the bottom of the auxiliary spring mounting plate is vulcanized with multiple layers of rubber blocks, and a reinforcing partition is provided between two adjacent rubber blocks.

[0013] As a preferred technical solution, the equalizing beam assembly includes a crossbeam with a U-shaped cross-section. Joint bearings are installed at both ends of the crossbeam. A trapezoidal mounting plate is fixedly installed in the middle of the upper surface of the crossbeam. The trapezoidal mounting plate includes a lower central plate. Lower waist plates are integrally provided symmetrically on both sides of the lower central plate. The lower waist plates are provided with mounting holes for installing the bottom surface of the rubber main spring. The width of the trapezoidal mounting plate is greater than the width of the crossbeam.

[0014] As a preferred technical solution, the upper cover includes two parallel, spaced trapezoidal notch uprights. The two ends of the trapezoidal notch uprights are inclined, and inclined mounting plates are installed at the corresponding ends of the two trapezoidal notch uprights. The inclined mounting plates are used to connect the vehicle frame. A trapezoidal mounting upper plate is fixedly installed at the bottom trapezoidal notch of the trapezoidal notch upright. The shape of the trapezoidal mounting upper plate is the same as that of the trapezoidal mounting lower plate. The trapezoidal mounting upper plate includes an upper central plate. Upper waist plates are integrally provided symmetrically on both sides of the upper central plate. The upper waist plates are provided with mounting holes for installing the top surface of the rubber main spring, and the upper central plate is provided with mounting holes for installing the rubber secondary spring.

[0015] As a preferred technical solution, hinge shafts are symmetrically installed at both ends of one side of the equalization beam assembly, and the hinge shafts are used to install damping shock absorbers.

[0016] As a preferred technical solution, the center of each of the two sides of the equalizing beam assembly is provided with a lower ear seat, and the two sides of the upper cover are also provided with an upper ear seat that cooperates with the lower ear seat. The limiting device is a limiting chain connecting the upper ear seat and the lower ear seat on the same side.

[0017] Due to the adoption of the above technical solution, a lightweight rubber suspension assembly with a low center of gravity and distributed stress is achieved. This assembly includes a balance beam assembly. The balance beam assembly has a trapezoidal protrusion extending upwards from its center. A trapezoidal mounting plate is fixedly installed on the top surface of the trapezoidal protrusion. Rubber main springs are symmetrically installed on the upper surfaces of both ends of the trapezoidal mounting plate. A top cover is installed at the top connecting the two rubber main springs, forming an inverted V-shaped support for the top cover. The top cover is directly connected to the vehicle frame. A rubber auxiliary spring is fixedly installed at the center of the bottom lower surface of the top cover, located between the two rubber main springs. The height of the auxiliary spring is less than the height of the main springs. The top cover and the balance beam assembly... A limiting device is installed between the parts. The beneficial effects of this utility model are: the upper cover of this utility model is made of iron or stainless steel and is directly connected to the vehicle frame, replacing the saddle support assembly in the prior art. This causes the overall structure of the rubber main spring to shift downward, resulting in a lower center of gravity and a shift of the rubber main spring to both sides. The stress points of the balance beam assembly are distributed from the center point to both sides. The original upper V-shaped support of the rubber main spring on the upper cover is changed to an inverted V-shaped support of the rubber main spring on the upper cover. The rubber main spring is directly connected between the balance beam assembly and the upper cover, which greatly reduces the overall height of this utility model and lowers the center of gravity. This not only meets the load-bearing requirements of the rubber suspension but also optimizes the assembly structure, reduces the assembly weight, conforms to the trend of lightweighting, and significantly improves the service life. Attached Figure Description

[0018] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0019] Figure 1 This is a three-dimensional structural diagram of the lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly of this utility model.

[0020] Figure 2 yes Figure 1 View A in the middle;

[0021] Figure 3 yes Figure 1 View B in the middle;

[0022] Figure 4 yes Figure 1 The C-direction view in the middle;

[0023] Figure 5 This is a schematic diagram of the upper cover structure of the lightweight, low-center-of-gravity, and stress-dispersed rubber suspension assembly of this utility model.

[0024] Figure 6 yes Figure 5 The view in direction D;

[0025] Figure 7This is one of the schematic diagrams of the rubber main spring structure of the lightweight, low-center-of-gravity, and force-dispersed rubber suspension assembly of this utility model.

[0026] Figure 8 yes Figure 7 The E-direction view in the middle;

[0027] Figure 9 yes Figure 8 Sectional view along the FF direction;

[0028] Figure 10 yes Figure 7 G-direction view in the middle;

[0029] Figure 11 This is a schematic diagram of the top bowl-shaped bracket of the rubber main spring of this utility model;

[0030] Figure 12 This is a cross-sectional view of the top bowl-shaped bracket of the rubber main spring of this utility model;

[0031] Figure 13 This is a schematic diagram of the structure of the middle bowl-shaped support of the rubber main spring of this utility model;

[0032] Figure 14 This is a schematic diagram of the bottom bowl-shaped support of the rubber main spring of this utility model;

[0033] Figure 15 This is one of the schematic diagrams of the rubber auxiliary spring structure of the lightweight, low-center-of-gravity, and force-dispersed rubber suspension assembly of this utility model.

[0034] Figure 16 This is the second schematic diagram of the rubber auxiliary spring structure of the lightweight, low-center-of-gravity, and force-dispersed rubber suspension assembly of this utility model.

[0035] Figure 17 yes Figure 16 A cross-sectional view along the HH direction;

[0036] Figure 18 This is one of the structural schematic diagrams of the equalization beam assembly of the lightweight, low-center-of-gravity, and stress-dispersed rubber suspension assembly of this utility model;

[0037] Figure 19 This is the second structural schematic diagram of the equalization beam assembly of the lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly of this utility model.

[0038] In the diagram: 1-Equalizing beam assembly; 11-Trapezoidal mounting plate; 12-Crossbeam; 13-Spherical bearing; 14-Hinge shaft; 15-Damping shock absorber; 16-Lower ear seat; 2-Rubber main spring; 21-Top bowl-shaped bracket; 211-Top square plate; 212-Bowl-shaped surrounding bracket; 213-Top horizontal flange; 214-Reinforcing rib; 22-Bottom bowl-shaped bracket; 221-Bottom square plate; 222-Bowl-shaped surrounding bracket; 23-Middle bowl-shaped bracket; 231-Bowl-shaped spacer bracket; 232-Middle horizontal flange ; 24-Top rubber block; 241-Top rubber body; 242-Top rubber horizontal flange; 25-Middle rubber block; 251-Middle rubber body; 252-Middle rubber horizontal flange; 26-Bottom rubber block; 261-Bottom rubber body; 262-Bottom rubber horizontal flange; 3-Upper cover; 31-Upper ear seat; 32-Trapezoidal notch upright plate; 33-Inclined mounting plate; 34-Trapezoidal mounting plate; 4-Rubber auxiliary spring; 41-Auxiliary spring mounting plate; 42-Rubber block; 43-Reinforcing partition; 5-Limiting chain. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0040] like Figures 1 to 19As shown in the figure, a lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly includes a balance beam assembly 1. The balance beam assembly 1 extends upwards from its center to form a trapezoidal protrusion. A trapezoidal mounting plate 11 is fixedly mounted on the top surface of the trapezoidal protrusion. Rubber main springs 2 are symmetrically mounted on the upper surfaces of both ends of the trapezoidal mounting plate 11. An upper cover 3 is mounted on the top connecting the two rubber main springs 2, forming an inverted V-shaped support for the upper cover 3. The upper cover 3 is directly connected to the vehicle frame. A rubber auxiliary spring 4 is fixedly mounted at the center of the bottom lower surface of the upper cover 3, located between the two rubber main springs 2. The height of the rubber auxiliary spring 4 is less than the height of the rubber main springs 2. A limiting device is installed between the upper cover 3 and the balance beam assembly 1. The upper cover 3 of this type is made of iron, stainless steel, sheet metal welding, or cast steel and is directly connected to the vehicle frame, replacing the saddle bracket assembly in the prior art. This causes the overall structure of the rubber main spring 2 to shift downward, resulting in a lower center of gravity and a shift of the rubber main spring 2 to both sides. The stress points of the balance beam assembly 1 are distributed from the center point to both sides. The original upper V-shaped support of the rubber main spring 2 on the upper cover 3 is changed to an inverted V-shaped support of the rubber main spring 2 on the upper cover 3. The rubber main spring 2 is directly connected between the balance beam assembly 1 and the upper cover 3, which greatly reduces the overall height of this utility model and lowers the center of gravity. This not only meets the load-bearing requirements of the rubber suspension but also optimizes the assembly structure, reduces the assembly weight, conforms to the trend of lightweighting, and significantly improves the service life.

[0041] like Figures 7 to 14 As shown, the rubber main spring 2 includes a top bowl-shaped support 21 and a bottom bowl-shaped support 22. Two or more intermediate bowl-shaped supports 23 are provided between the top and bottom bowl-shaped supports 21 and 22. In this embodiment, two layers of intermediate bowl-shaped supports 23 are provided, but the number of layers can be adjusted according to actual conditions. The top, bottom, and intermediate bowl-shaped supports 23 have the same curvature and equal spacing. A top rubber block 24 is integrally vulcanized between the top bowl-shaped support 21 and its adjacent intermediate bowl-shaped supports 23. The top rubber block 24 is arc-shapedly connected to the top bowl-shaped support 21 and the intermediate bowl-shaped supports 23, greatly increasing the contact area and reducing the risk of cracking between the top rubber block 24 and the top bowl-shaped support 21. An intermediate rubber block 25 is integrally vulcanized between two adjacent intermediate bowl-shaped supports 23. The intermediate rubber block 25 is sandwiched between the two intermediate bowl-shaped supports 23, which also increases the contact area and reduces the risk of cracking between the intermediate rubber block 25 and the intermediate bowl-shaped supports 23. A bottom bowl-shaped support 22 and its adjacent intermediate bowl-shaped support 23 are integrally vulcanized with a bottom rubber block 26. The bottom rubber block 26 is arc-shapedly connected to the bottom bowl-shaped support 22 and the intermediate bowl-shaped support 23, which greatly increases the contact area and reduces the risk of cracking between the bottom rubber block 26 and the bottom bowl-shaped support 22. The top bowl-shaped support 21, the bottom bowl-shaped support 22, and the intermediate bowl-shaped support 23 are preferably cast steel parts, but can also be sheet metal parts.

[0042] like Figures 12 to 14 As shown, the top bowl-shaped support 21 includes a top square plate 211, with mounting holes at each of its four corners for fixed connection with the upper cover 3. A bowl-shaped surrounding support 212 extends downwards from the center of the lower surface of the top square plate 211 in an arc shape. The curvature of the bowl-shaped surrounding support 212 matches the curvature of the top rubber body 241. The upper surface of the top rubber body 241 is tightly fitted and vulcanized with the bowl-shaped surrounding support 212, and the lower surface of the top rubber body 241 is tightly fitted and vulcanized with the bowl-shaped spacer support 231. A top horizontal flange 213 is provided at the rim of the bowl-shaped surrounding support 212. In this embodiment, the top horizontal flange 213 is a regular octagon, but it can also be circular, elliptical, or other polygonal shapes. Multiple reinforcing ribs 214 are provided between the top square plate 211 and the top horizontal flange 213; the reinforcing ribs 214 provide more effective support for the bowl-shaped surrounding bracket 212. In this embodiment, four reinforcing ribs 214 are provided, but the number can be increased or decreased according to the actual situation.

[0043] The bottom bowl-shaped support 22 includes a bottom square plate 221. The four corners of the bottom square plate 221 are provided with mounting holes for fixed connection with the balance beam assembly 1. A bowl-shaped surrounding bracket 222 protrudes upwards from the center of the bottom square plate 221. The curvature of the bowl-shaped surrounding bracket 222 matches the curvature of the bottom rubber body 261. The lower surface of the bottom rubber body 261 is tightly fitted and vulcanized with the bowl-shaped surrounding bracket 222, and the upper surface of the bottom rubber body 261 is tightly fitted and vulcanized with the bowl-shaped spacer bracket 231. The middle bowl-shaped support 23 includes a bowl-shaped spacer bracket 231. The bowl-shaped spacer bracket 231 has a middle horizontal flange 232 at its rim. The middle horizontal flange 232 has the same shape and size as the top horizontal flange 213. The upper and lower surfaces of the middle rubber body 251 are both tightly fitted and vulcanized with the bowl-shaped spacer bracket 231.

[0044] In existing technologies, the internal structure of the rubber main spring 2 is mostly a planar bracket or a single-sided bracket. The disadvantage of this structure is that the external force borne by the internal bracket cannot be evenly released, acting only at a certain point or area, and there is a risk of cracking between the rubber and the bracket. Frequent compression and heavy loads also limit its service life. In this embodiment, the rubber main spring 2 changes the bracket shape to an arc-shaped bowl, increasing internal strength by more than 30%, improving shock absorption and cushioning, reducing the risk of cracking between the rubber and the bracket, and enhancing its performance under compression and heavy loads. The top bowl-shaped bracket 21, the bottom bowl-shaped bracket 22, and the middle bowl-shaped bracket 23 are all stamped, and the four brackets are vulcanized as a whole into a vulcanized part with a skeleton. The rubber main spring 2 in this embodiment has increased strength, better shock absorption and cushioning, and under heavy and uneven loads, the overall suspension force is evenly distributed, better adapting to different vehicle load conditions. It effectively solves the problem of sudden frequency shifts in the suspension when the vehicle is unloaded, medium-loaded, and fully loaded, making the vehicle ride smooth and comfortable. Under uneven loads, the structure between the rubber and the bracket is relatively stable, the bracket and rubber are less prone to cracking, and the service life is significantly improved.

[0045] like Figure 9 As shown, the top rubber block 24 includes a top rubber body 241 adapted to the bowl-shaped surrounding bracket 212, and a top rubber horizontal flange 242 is provided at the lower part of the top rubber body 241. The top rubber horizontal flange 242 is inclined to one side at 10° to 30°. The middle rubber block 25 includes a middle rubber body 251 adapted to the bowl-shaped spacer bracket 231, and a middle rubber horizontal flange 252 is provided at the lower part of the middle rubber body 251. The middle rubber horizontal flange 252 is inclined to one side at 10° to 30°. The bottom rubber block 26 includes a bottom rubber body 261 adapted to the bowl-shaped surrounding bracket 222, and a bottom rubber horizontal flange 262 is provided at the lower part of the bottom rubber body 261. The bottom rubber horizontal flange 262 is inclined to one side at 10° to 30°. The inclination directions of the top rubber horizontal flange 242, the middle rubber horizontal flange 252 and the bottom rubber horizontal flange 262 are consistent. The top rubber horizontal flange 242, the middle rubber horizontal flange 252 and the bottom rubber horizontal flange 262 have the same tilt angle, so their outer surfaces are on the same plane. The left and right rubber main springs 2 are symmetrically installed and form an inverted V shape. According to the stability of a triangle, it can be seen that the two rubber main springs 2 together support the frame more stably.

[0046] like Figure 9 As shown, in this embodiment, the top rubber horizontal flange 242 is tilted to one side with ∠a=20°; the middle rubber horizontal flange 252 is tilted to one side with ∠a=20°; and the bottom rubber horizontal flange 262 is tilted to one side with ∠a=20°. The tilt angle can be adjusted appropriately according to actual use, all of which are within the protection scope of this utility model.

[0047] like Figures 15 to 17As shown, the rubber auxiliary spring 4 includes an auxiliary spring mounting plate 41 with mounting holes. Multiple layers of rubber blocks 42 are vulcanized at the bottom of the auxiliary spring mounting plate 41, and a reinforcing partition 43 is provided between adjacent rubber blocks 42. The thickness of each layer of rubber blocks 42 is preferably consistent, but can also be different thicknesses. The rubber blocks 42 are approximately rectangular discs. The shape of the reinforcing partition 43 is consistent with the shape of the rubber blocks 42, and the outer periphery of the reinforcing partition 43 extends beyond the outer periphery of the rubber blocks 42. The reinforcing partition 43 and the rubber blocks 42 are arranged alternately and then vulcanized together. The reinforcing partition 43 is located on the top of the auxiliary spring mounting plate 41 for fixed connection with the upper cover 3. The rubber auxiliary spring 4 assists the rubber main spring 2 in buffering and shock absorption.

[0048] like Figure 18 and Figure 19 As shown, the equalizing beam assembly 1 includes a U-shaped cross beam 12, with joint bearings 13 installed at both ends of the cross beam 12. A trapezoidal mounting plate 11 is fixedly installed in the middle of the upper surface of the cross beam 12. The trapezoidal mounting plate 11 includes a lower central plate, and lower waist plates are integrally provided on both sides of the lower central plate. The lower waist plates are provided with mounting holes for installing the bottom surface of the rubber main spring 2. The width of the trapezoidal mounting plate 11 is greater than the width of the cross beam 12. The upper cover 3 includes two parallel, spaced trapezoidal notch uprights 32. The ends of the trapezoidal notch uprights 32 are inclined. Inclined mounting plates 33 are installed at the corresponding ends connecting the two trapezoidal notch uprights 32. A top plate is installed at the top connecting the two trapezoidal notch uprights 32. The inclined mounting plates 33 are used to connect the frame. The inclined mounting plates 33 on both sides are V-shaped. A trapezoidal mounting upper plate 34 is fixedly installed at the bottom trapezoidal notch of the trapezoidal notch uprights 32. The shape and dimensions of the trapezoidal mounting upper plate 34 are consistent with those of the trapezoidal mounting lower plate 11. The trapezoidal mounting upper plate 34 includes an upper central plate. Symmetrical upper waist plates are integrally provided on both sides of the upper central plate. The upper waist plates have mounting holes for installing the top surface of the rubber main spring 2, and the upper central plate has mounting holes for installing the rubber auxiliary spring 4. The trapezoidal notch uprights 32 have weight-reducing perforations to further reduce their weight while ensuring support strength.

[0049] like Figures 1 to 3 As shown, hinge shafts 14 are symmetrically mounted at both ends of one side of the equalization beam assembly 1. The hinge shafts 14 are used to mount the damping shock absorbers 15.

[0050] like Figures 1 to 4 As shown, the center of each of the two sides of the equalizing beam assembly 1 is provided with a lower ear seat 16, and the two sides of the upper cover 3 are also provided with an upper ear seat 31 that cooperates with the lower ear seat 16. The limiting device is a limiting chain 5 connecting the upper ear seat 31 and the lower ear seat 16 on the same side. The limiting chain 5 is used to limit the distance between the equalizing beam assembly 1 and the upper cover 3.

[0051] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightweight rubber suspension assembly with a low center of gravity and distributed stress, including a balance beam assembly (1), characterized in that: The middle part of the equalizing beam assembly (1) extends upward to form a trapezoidal protrusion. A trapezoidal mounting plate (11) is fixedly installed on the top surface of the trapezoidal protrusion. Rubber main springs (2) are symmetrically installed on the upper surfaces of both ends of the trapezoidal mounting plate (11). An upper cover (3) is installed on the top connecting the two rubber main springs (2). The two rubber main springs (2) form an inverted V-shaped support for the upper cover (3). The upper cover (3) is directly connected to the frame. A rubber auxiliary spring (4) is fixedly installed at the center of the bottom lower surface of the upper cover (3). The rubber auxiliary spring (4) is located between the two rubber main springs (2). The height of the rubber auxiliary spring (4) is less than the height of the rubber main springs (2). A limiting device is installed between the upper cover (3) and the equalizing beam assembly (1).

2. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 1, characterized in that: The rubber main spring (2) includes a top bowl-shaped bracket (21) and a bottom bowl-shaped bracket (22). There are two or more intermediate bowl-shaped brackets (23) between the top bowl-shaped bracket (21) and the bottom bowl-shaped bracket (22). The top bowl-shaped bracket (21), the bottom bowl-shaped bracket (22) and the intermediate bowl-shaped brackets (23) have the same curvature and equal spacing. A top rubber block (24) is integrally vulcanized between the top bowl-shaped bracket (21) and its adjacent intermediate bowl-shaped bracket (23). An intermediate rubber block (25) is integrally vulcanized between two adjacent intermediate bowl-shaped brackets (23). A bottom rubber block (26) is integrally vulcanized between the bottom bowl-shaped bracket (22) and its adjacent intermediate bowl-shaped bracket (23).

3. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 2, characterized in that: The top bowl-shaped support (21) includes a top square plate (211), with mounting holes at the four corners of the top square plate (211). The lower surface of the top square plate (211) extends downward in an arc from the center and is provided with a bowl-shaped surrounding support (212). The bowl-shaped surrounding support (212) is provided with a top horizontal flange (213) at the bowl opening. Multiple reinforcing ribs (214) are provided between the top square plate (211) and the top horizontal flange (213). The bottom bowl-shaped support (22) includes a bottom square plate (221), with mounting holes at the four corners of the bottom square plate (221), and a bowl-shaped surrounding bracket (222) is provided in the middle of the bottom square plate (221) which is bent upward. The intermediate bowl-shaped support (23) includes a bowl-shaped spacer support (231), and the bowl-shaped spacer support (231) has a middle horizontal flange (232) at the rim, and the middle horizontal flange (232) has the same shape and size as the top horizontal flange (213).

4. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 3, characterized in that: The top rubber block (24) includes a top rubber body (241) adapted to the bowl-shaped surrounding bracket (212), and the lower part of the top rubber body (241) is provided with a top rubber horizontal flange (242), which is inclined to one side at 10° to 30°; the middle rubber block (25) includes a middle rubber body (251) adapted to the bowl-shaped spacer bracket (231), and the lower part of the middle rubber body (251) is provided with a middle rubber horizontal flange (252), which is inclined to one side at 10° to 30°; the middle rubber block (25) includes a middle rubber body (251) adapted to the bowl-shaped spacer bracket (231), and the lower part of the middle rubber body (251) is provided with a middle rubber horizontal flange (252), which is inclined to one side at 10° to 30°; The rubber horizontal flange (252) is tilted to one side at 10° to 30°; the bottom rubber block (26) includes a bottom rubber body (261) adapted to the bowl-shaped surrounding bracket (222), the bottom rubber body (261) is provided with a bottom rubber horizontal flange (262) at the lower part, the bottom rubber horizontal flange (262) is tilted to one side at 10° to 30°, and the tilting direction of the top rubber horizontal flange (242), the middle rubber horizontal flange (252) and the bottom rubber horizontal flange (262) is consistent.

5. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 4, characterized in that: The top rubber horizontal flange (242) is tilted to one side by 20°; the middle rubber horizontal flange (252) is tilted to one side by 20°; and the bottom rubber horizontal flange (262) is tilted to one side by 20°.

6. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 1, characterized in that: The rubber auxiliary spring (4) includes an auxiliary spring mounting plate (41), which has mounting holes. The bottom of the auxiliary spring mounting plate (41) is vulcanized with multiple layers of rubber blocks (42), and a reinforcing partition (43) is provided between two adjacent rubber blocks (42).

7. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 1, characterized in that: The equalizing beam assembly (1) includes a crossbeam (12) with a U-shaped cross section. Joint bearings (13) are installed at both ends of the crossbeam (12). The trapezoidal mounting plate (11) is fixedly installed in the middle of the upper surface of the crossbeam (12). The trapezoidal mounting plate (11) includes a lower central plate. The lower central plate has symmetrically integrated lower waist plates on both sides. The lower waist plates have mounting holes for installing the bottom surface of the rubber main spring (2). The width of the trapezoidal mounting plate (11) is greater than the width of the crossbeam (12).

8. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 7, characterized in that: The upper cover (3) includes two parallel trapezoidal notch uprights (32), the two ends of the trapezoidal notch uprights (32) are inclined, and inclined mounting plates (33) are installed at the corresponding ends of the two trapezoidal notch uprights (32). The inclined mounting plates (33) are used to connect the frame. A trapezoidal mounting upper plate (34) is fixedly installed at the bottom trapezoidal notch of the trapezoidal notch uprights (32). The shape of the trapezoidal mounting upper plate (34) is consistent with the shape and size of the trapezoidal mounting lower plate (11). The trapezoidal mounting upper plate (34) includes an upper central plate. The upper central plate has symmetrical upper waist plates on both sides. The upper waist plates have mounting holes for installing the top surface of the rubber main spring (2). The upper central plate has mounting holes for installing the rubber secondary spring (4).

9. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 1, characterized in that: The equalizing beam assembly (1) has hinge shafts (14) symmetrically installed at both ends on one side, and the hinge shafts (14) are used to install damping shock absorbers (15).

10. The lightweight, low-center-of-gravity, and stress-distributed rubber suspension assembly as described in claim 1, characterized in that: The equalizing beam assembly (1) has a lower ear seat (16) at the center of each side. The upper cover (3) also has an upper ear seat (31) on each side that works with the lower ear seat (16). The limiting device is a limiting chain (5) connecting the upper ear seat (31) and the lower ear seat (16) on the same side.

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