Rubber suspension system with auxiliary spring protection layer assembly and disassembly and assembly method of protection layer assembly

Abstract

The invention relates to the technical field of rubber suspensions, in particular to a rubber suspension system with an auxiliary spring protection layer assembly and a dismounting and mounting method of the protection layer assembly.The rubber suspension system comprises an upper mounting base, a lower mounting base, a damping main spring and an auxiliary spring, the protection layer assembly is arranged at the lower end of the auxiliary spring, and the protection layer assembly comprises a protection layer body and a protection layer back plate; a first connecting groove, a second connecting groove and a third connecting groove are formed in the protective layer body, the protective layer back plate and a bottom plate of the auxiliary spring correspondingly and communicate with one another, and buckling units capable of clamping the protective layer body to the bottom plate of the auxiliary spring are arranged in the first connecting groove, the second connecting groove and the third connecting groove. The protective layer assembly is detachably connected to the bottom plate of the auxiliary spring through the buckle unit. According to the suspension system in the scheme, when the auxiliary spring is abraded, only the protective layer unit needs to be replaced, the main body structure of the auxiliary spring does not need to be replaced, and a user can be reminded to replace the protective layer assembly in time.

Description

Technical Field

[0001] This invention relates to the field of rubber suspension technology, and specifically provides a rubber suspension system with an auxiliary spring sheath assembly and a method for disassembling and assembling the sheath assembly. Background Technology

[0002] Rubber suspension is a suspension system that uses rubber as the elastic element. It mainly absorbs road impacts through the elastic deformation of rubber to support and dampen the vehicle. Rubber suspension is a suspension system with unique advantages, especially in terms of lightweight, comfort and low maintenance costs.

[0003] Currently, rubber suspension systems are widely used in heavy commercial vehicles and engineering vehicles. Rubber suspension systems are usually a combination of main springs and rubber auxiliary springs. They are often used to bear peak loads and buffer extreme loads. However, during long-term service, the bottom of the auxiliary spring, especially the bottom protective layer, is easily affected by road debris, mud and sand erosion, and the fatigue of the rubber itself, which can easily lead to problems such as edge wear, peeling and premature failure.

[0004] Existing literature includes the following patent designs for auxiliary springs in rubber suspensions: 1. The patent document with publication number "CN101328945B" and titled "An Auxiliary Rubber-Metal Laminated Spring for Heavy-Duty Trucks and Its Installation Method" adopts a laminated rubber-metal spring structure, which is a composite elastic rubber-metal body composed of multiple layers of elastic rubber and metal spacers. The multiple layers of elastic rubber and metal spacers are arranged in a conical structure. A nylon plate is attached to the top layer of the composite elastic rubber-metal body. The nylon plate must be at the top of the auxiliary rubber-metal laminated spring. When the heavy-duty truck is not carrying cargo, the auxiliary rubber-metal laminated spring does not come into contact with the axle. When the load increases, the nylon plate of the auxiliary rubber-metal laminated spring begins to contact the axle and begins to play a vibration damping role.

[0005] 2. The patent document with publication number "CN203267709U" and title "A Single-Sided Rubber Suspension Assembly and a Rubber Suspension" includes an auxiliary rubber spring, a saddle assembly, and a spring bracket. The saddle assembly is connected to the spring bracket through the auxiliary rubber spring. There are two auxiliary rubber springs, and the two auxiliary rubber springs are symmetrically arranged about the axis of symmetry of the single-sided rubber suspension assembly. Compared with the previous arrangement of a single auxiliary rubber spring, this solution not only increases the overall stiffness of the elastic element under heavy load.

[0006] In the existing structure described above, the protective layer at the bottom of the auxiliary spring is usually integrally formed with the main body of the auxiliary spring. When damage occurs, the following shortcomings exist: 1. In the aforementioned existing literature 1, when the nylon plate is damaged locally, it cannot be repaired quickly and the auxiliary spring must be replaced as a whole, which will increase production costs and reduce efficiency; 2. The existing literature 2 mentioned above only increases the number of auxiliary springs, increases stiffness, and improves the uniformity of load distribution. However, when the lower end of the auxiliary spring wears down, the entire auxiliary spring still needs to be replaced, which also increases costs and reduces efficiency. 3. In existing technologies, users often find it difficult to detect wear and tear failures in a timely manner, which reduces work efficiency and shortens the overall product lifespan. 4. Existing technologies use a single protective layer material, which has limited impact resistance and wear resistance.

[0007] In conclusion, designing a modular rubber suspension system with replaceable auxiliary spring sheath components and wear indication function is an urgent problem to be solved. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a rubber suspension system with an auxiliary spring sheath assembly and a method for disassembling and assembling the sheath assembly. This system features quick assembly and disassembly, enhanced wear resistance, and eliminates the need to replace the entire auxiliary spring structure when wear occurs, thus prompting users to replace the sheath assembly in a timely manner.

[0009] This invention provides a rubber suspension system with an auxiliary spring sheath assembly, comprising an upper mounting base and a lower mounting base. A damping main spring and an auxiliary spring located between the upper and lower mounting bases are included. A sheath assembly is disposed at the lower end of the auxiliary spring. The sheath assembly includes a sheath body and a sheath back plate, with the sheath back plate located between the sheath body and the bottom plate of the auxiliary spring. Connecting grooves one, two, and three are respectively provided on the sheath body, the sheath back plate, and the bottom plate of the auxiliary spring. Connecting grooves one, two, and three are interconnected, and each of the connecting grooves contains a snap-fit ​​unit capable of clamping the sheath body onto the bottom plate of the auxiliary spring. The sheath assembly is detachably connected to the bottom plate of the auxiliary spring via the snap-fit ​​units.

[0010] Furthermore, the protective layer body includes a wear indicator layer, which is located at the critical wear thickness and has a wear indicator piece embedded within it.

[0011] Furthermore, the snap-fit ​​unit includes a spring body disposed in the first connecting groove and a sliding platform connected to the spring body. The spring body is located at the inner end of the sliding platform, and a locking platform is provided on the sliding platform near the spring body. The locking platform can extend from the first connecting groove and the second connecting groove into the third connecting groove and be fastened in the third connecting groove.

[0012] Furthermore, the locking platform includes a vertical platform and an inverted platform, and the connecting groove three includes a connecting groove corresponding to and communicating with connecting groove two and connecting groove one, and a stepped groove arranged in a stepped manner with the connecting groove. When the protective layer assembly is fastened, the inverted platform abuts against and fastens to the bottom of the stepped groove.

[0013] Furthermore, the width of both the connecting groove 2 and the connecting groove is not less than the sum of the widths of the vertical platform and the inverted platform, and the height of the stepped groove is not less than the height of the inverted platform.

[0014] Furthermore, connecting groove one is connected to the outside of the protective layer body, and the width of the sliding platform is greater than the width of connecting sleeve one, that is, the sliding platform can extend to the outside of the protective layer body; connecting groove two is not connected to the outside of the protective layer back plate, and connecting groove three is not connected to the outside of the bottom plate of the auxiliary spring.

[0015] Furthermore, the backing plate of the protective layer is provided with multiple mounting holes, and mounting bolts are installed in the mounting holes to connect the backing plate of the protective layer to the protective layer body. Before the protective layer assembly is installed, the wear indicator is first injection molded and embedded in the protective layer body, and then the backing plate of the protective layer is connected to the protective layer body by mounting bolts, so that the protective layer body and the backing plate of the protective layer become a whole.

[0016] Furthermore, the backing plate of the protective layer is also provided with fastening holes, which are located on the outside of the protective layer body. Fastening bolts are installed in the fastening holes to connect the backing plate of the protective layer to the base plate of the auxiliary spring.

[0017] Furthermore, the fastening bolts lock the sheath backing plate onto the base plate of the auxiliary spring from bottom to top, and the inverted fastening platform is inverted onto the bottom of the stepped groove from top to bottom; that is, the tightening force of the fastening bolts and the fastening force of the inverted fastening platform are opposite in direction, and the sheath backing plate, along with the sheath body, is locked onto the auxiliary spring by the cooperation of the opposite tightening and fastening forces.

[0018] A method for disassembling and assembling the sheath assembly of a rubber suspension system with an auxiliary spring sheath assembly includes the following steps: During installation: S1a: Place the entire structure consisting of the sheath body and the sheath back plate under the auxiliary spring, push the sliding platform inward until the locking platform extends into the connecting groove three and the inverted platform is fastened to the bottom of the stepped groove, and then release the sliding platform. S2a: Tighten the fastening bolts in the fastening holes and connect the backing plate to the base plate of the auxiliary spring to achieve the installation of the backing plate assembly; During disassembly: S1b: First remove the fastening bolts; S2b: Push the sliding platform inward again so that the inverted platform leaves the stepped groove; S2c: Remove the entire protective cover assembly consisting of the protective cover body and the protective cover backing plate to disassemble the protective cover component.

[0019] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. This invention introduces a set of independent, detachable, and easily replaceable protective layer units at the bottom of the auxiliary spring. The protective layer unit bears the wear and impact of the bottom rubber layer. The protective layer material is a high-strength wear-resistant composite layer, which is fixed to the bottom of the metal pad by means of buckles and screws. When a certain degree of wear is reached, the protective layer unit can be replaced independently without replacing the entire auxiliary spring structure, which can greatly reduce costs and improve work efficiency.

[0020] 2. This invention features a bright indicator layer. When the protective layer wears down to the marked area, it displays a striking color, prompting the user to replace the protective layer in a timely manner. This design allows for quick installation and removal while improving wear resistance, thus enhancing the product's reliability and maintainability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the rubber suspension system provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the auxiliary spring provided according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the wear indicator provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of the protective layer body provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the backing plate provided in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the sliding stage, locking stage, and spring body provided in Embodiment 1 of the present invention; Figure 7 This is a partial structural schematic diagram of the auxiliary spring provided according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the auxiliary spring provided according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the structure of the base plate of the auxiliary spring according to Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the structure of the base plate of the auxiliary spring according to Embodiment 1 of the present invention; Figure 11 It is provided according to Embodiment 1 of the present invention. Figure 10 A cross-sectional view along the CC direction; Figure 12 This is a structural schematic diagram of the protective layer body and the protective layer backing plate provided in Embodiment 1 of the present invention; Figure 13 This is a schematic diagram of the overall structure of the rubber suspension system provided in Embodiment 2 of the present invention; Figure 14 This is a partial structural schematic diagram of the rubber suspension system provided in Embodiment 2 of the present invention; Figure 15 This is a partial structural schematic diagram of the rubber suspension system provided in Embodiment 2 of the present invention; Figure 16 This is a partial structural schematic diagram of the rubber suspension system provided in Embodiment 2 of the present invention; Figure 17 This is a partial structural schematic diagram of the damper provided according to Embodiment 2 of the present invention.

[0022] The reference numerals in the accompanying drawings include: upper mounting base 1, lower mounting base 2, main damping spring 3, auxiliary spring 4, protective layer body 5, protective layer back plate 6, connecting groove one 7, connecting groove two 8, connecting groove three 9, wear indicator 10, spring body 11, sliding platform 12, locking platform 13, vertical platform 14, inverted platform 15, connecting groove 16, stepped groove 17, mounting hole 18, fastening hole 19, fastening bolt 20, base plate 25, spring hole 26. 27. Lower support assembly 28. Upper support assembly 29. Limiting plate 20. Damper 30. Upper support frame 31. Upper support platform 32. Upper connecting block 33. Upper horizontal frame 34. Upper side frame 35. Connecting ear plate 36. Side block 37. Inclined block 38. Connecting tie rod 39. Sealing cover 40. Lower support frame 41. Lower horizontal frame 42. Lower side frame 43. Enclosing frame 44. Lower connecting block 45. Upper connecting ball joint 46. Sealing ring 47. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-16 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof. Example 1

[0024] This implementation example Figure 1-12As shown, a rubber suspension system with an auxiliary spring sheath assembly includes an upper mounting base 1 and a lower mounting base 2. Between the upper mounting base 1 and the lower mounting base 2, there is a damping main spring 3 and an auxiliary spring 4 located between the damping main spring 3. A sheath assembly is provided at the lower end of the auxiliary spring 4. The sheath assembly includes a sheath body 5 and a sheath back plate 6. The sheath back plate 6 is located between the sheath body 5 and the bottom plate 25 of the auxiliary spring 4. The sheath body 5 includes a wear indicator layer located at the critical wear thickness. A wear indicator piece 10 is embedded in the wear indicator layer. Before installing the sheath assembly, the wear indicator piece 10 is first injection molded and embedded in the sheath body 5. Then, the sheath back plate 6 is connected to the sheath body 5 by mounting bolts, so that the sheath body 5 and the sheath back plate 6 become a whole. In this embodiment, a damper 30 is included, which is located outside the damping main spring 3.

[0025] The protective cover body 5, the protective cover back plate 6, and the base plate 25 of the auxiliary spring 4 are respectively provided with connecting groove 1 7, connecting groove 2 8, and connecting groove 3 9. Connecting groove 1 7, connecting groove 2 8, and connecting groove 3 9 are connected to each other. The connecting groove 1 7, connecting groove 2 8, and connecting groove 3 9 are provided with a snap-fit ​​unit that can fasten the protective cover body 5 to the base plate 25 of the auxiliary spring 4. The protective cover assembly is detachably connected to the base plate 25 of the auxiliary spring 4 through the snap-fit ​​unit. Therefore, when the protective cover assembly is worn and needs to be replaced, it is only necessary to remove the protective cover assembly through the snap-fit ​​unit and replace it with a new protective cover assembly. It is not necessary to replace the entire auxiliary spring 4.

[0026] The snap-fit ​​unit includes a spring body 11 disposed in the first connecting groove 7 and a sliding platform 12 connected to the spring body 11. The bottom of the first connecting groove 7 is provided with a spring hole 26, and the spring body 11 is connected to the spring hole 26. The spring body 11 is located at the inner end of the sliding platform 12. A locking platform 13 is provided on the sliding platform 12 near the spring body 11. The locking platform 13 can extend from the first connecting groove 7 and the second connecting groove 8 into the third connecting groove 9 and be fastened in the third connecting groove 9. The locking platform 13 includes a vertical platform 14 and an inverted platform 15. The third connecting groove 9 includes a connecting groove 16 corresponding to and communicating with the second connecting groove 8 and the first connecting groove 7, and a stepped groove 17 arranged in a stepped manner with the connecting groove 16. When the protective layer assembly is fastened, the inverted platform 15 abuts against and fastens to the bottom of the stepped groove 17.

[0027] The widths of connecting groove 2 8 and connecting groove 16 are not less than the sum of the widths of the vertical platform 14 and the inverted platform 15, so that the locking platform 13 can extend into connecting groove 2 8 and connecting groove 16. The height of stepped groove 17 is not less than the height of inverted platform 15, so that inverted platform 15 can extend into and be inverted in stepped groove 17. Connecting groove 1 7 is connected to the outside of the protective layer body 5. The width of sliding platform 12 is greater than the width of connecting sleeve 1, that is, sliding platform 12 can extend to the outside of the protective layer body 5, so as to facilitate the operation of sliding platform 12 and pushing sliding platform 12 in. Connecting groove 2 8 is not connected to the outside of the protective layer back plate 6. Connecting groove 3 9 is not connected to the outside of the bottom plate 25 of auxiliary spring 4. The protective layer back plate 6 is provided with multiple mounting holes 18. Mounting bolts are installed in the mounting holes 18 to connect the protective layer back plate 6 to the protective layer body 5.

[0028] The backing plate 6 is also provided with fastening holes 19, which are located on the outside of the backing plate 5. Fastening bolts 20 are installed in the fastening holes 19 to connect the backing plate 6 to the base plate 25 of the auxiliary spring 4. Figure 6 As shown at point K, the backing plate 6 is connected to the body 5. The fastening bolts 20 lock the backing plate 6 to the base plate 25 of the auxiliary spring 4 from bottom to top. The inverted platform 15 is inverted on the bottom of the stepped groove 17 from top to bottom. That is, the tightening force of the fastening bolts 20 and the fastening force of the inverted platform 15 are opposite in direction. The backing plate 6, along with the body 5, is locked to the auxiliary spring 4 by the cooperation of the opposite tightening and fastening forces.

[0029] A method for disassembling and assembling the sheath assembly of a rubber suspension system with an auxiliary spring 4 sheath assembly includes the following steps: During installation: S1a: Place the whole consisting of the protective body 5 and the protective back plate 6 under the auxiliary spring 4, push the sliding platform 12 inward until the locking platform 13 extends into the connecting groove 9 and the inverted platform 15 is fastened to the bottom of the stepped groove 17, and release the sliding platform 12.

[0030] S2a: Tighten the fastening bolt 20 in the fastening hole 19 and connect the backing plate 6 to the base plate 25 of the auxiliary spring 4 to achieve the installation of the backing plate assembly.

[0031] During disassembly: S1b: First remove the fastening bolt 20.

[0032] S2b: Push the sliding stage 12 inward again, so that the inverted stage 15 leaves the stepped groove 17.

[0033] S2c: Remove the entire protective layer assembly consisting of the protective layer body 5 and the protective layer back plate 6 to disassemble the protective layer component. Example 2

[0034] like Figure 13-16As shown, the difference between this embodiment and Embodiment 1 is that the damper 30 in this embodiment is set inside the main damping spring 3. The lower mounting base 2 has a lower support group 27 in the middle, and the upper mounting base 1 has an upper support group 28 at the lower ends on both sides. The main damping spring 3 is located between the side end of the lower support group 27 and the upper support group 28. The auxiliary spring 4 is located between the upper end of the middle of the lower support group 27 and the upper support group 28. The damper 30, which is coaxial with the main damping spring 3, is embedded inside the main damping spring 3. The two ends of the damper 30 are respectively connected to the upper support group 28 and the lower support group 27, thereby integrating the damper 30 with the main damping spring 3. The upper part and the middle part of the damper 30 are respectively provided with an upper sealing unit and a middle sealing unit.

[0035] The upper support assembly 28 includes an upper support frame 31 and an upper support platform 32 connected to the lower end of the upper mounting base 1. The upper support platform 32 is located on both sides of the upper support frame 31. The upper end of the damper 30 is connected to the upper support platform 32, and the damping main spring 3 is locked to the upper support frame 31 by the upper connecting block 33. The upper support frame 31 includes an upper horizontal frame 34 parallel to and connected to the upper mounting base 1 and an upper side frame 35 obliquely placed at both ends of the upper horizontal frame 34. The upper side frame 35 includes a central through hole. The upper connecting block 33 is locked to the upper side frame 35. The upper cylinder of the damper 30 passes through the central through hole and is connected to the upper support platform 32 inside the upper support platform 32, specifically through the upper connecting ball joint 46.

[0036] The upper support platform 32 includes a side block 37 and an inclined block 38 that abut against the upper connecting block 33. The inclined block 38 is located between the side blocks 37 and is inclined outward from the central through hole toward the upper mounting seat 1. The upper end of the damper 30 is connected between the side blocks 37. A connecting rod 39 is also provided between the inclined block 38 and the lower mounting seat 2. The upper sealing unit is located in the middle of the upper connecting block 33 and between the upper connecting block 33 and the damper 30. The upper sealing unit is a sealing ring 47.

[0037] The central sealing unit is located between the upper and lower piston rods of the damper 30. Specifically, it is a sealing cover 40 sleeved on the outside of the connection between the upper and lower piston rods. The sealing cover 40 forms a sealed cavity with the upper and lower piston rods. The lower support assembly 27 includes a lower support frame 41 located in the middle of the lower mounting base 2. The lower support frame 41 includes a lower horizontal frame 42 parallel to the upper horizontal frame 34 and a lower side frame 43 obliquely placed at both ends of the lower horizontal frame 42. The damping main spring 3 is connected between the lower side frame 43 and the upper side frame 35. An enclosing frame 44 is connected between the lower side frames 43. The lower side frame 43 and the enclosing frame 44 together form a connecting cavity. The lower end of the damper 30 passes through the lower side frame 43 and is connected to the enclosing frame 44 in the connecting cavity. Specifically, the connection is made through a lower connecting ball joint.

[0038] The damping main spring 3 and the lower support frame 41 are locked together by the lower connecting block 45. The upper connecting block 33 is locked to the lower frame 43 on the outside of the enclosure frame 44. The lower end of the enclosure frame 44 includes a connecting ear plate 36 connected to the lower mounting base 2. The lower end of the connecting ear plate 36 is located below the lower frame 43. A limiting plate 29 is provided on the lower horizontal frame 42. The auxiliary spring 4 is connected to the upper horizontal frame 34 and located above the limiting plate 29.

[0039] In this embodiment, the damper 30 is placed inside the main shock-absorbing spring 3, which can reduce the overall volume of the suspension system, optimize space utilization, greatly improve the dynamic consistency and system stability of the main shock-absorbing spring 3 and the damper 30, reduce maintenance difficulty, support modular quick replacement, and at the same time, the embedded damper 30 has natural dustproof and water-resistant capabilities, which can improve the system life.

[0040] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0041] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rubber suspension system with an auxiliary spring shield assembly, comprising an upper mount (1) and a lower mount (2), between which there are a main shock absorbing spring (3) and an auxiliary spring (4) located between the main shock absorbing spring (3), characterized in that, The protective layer assembly is arranged at the lower end of the auxiliary spring (4), and comprises a protective layer body (5) and a protective layer back plate (6), the protective layer back plate (6) being arranged between the protective layer body (5) and the bottom plate (25) of the auxiliary spring (4); the protective layer body (5), the protective layer back plate (6) and the bottom plate (25) of the auxiliary spring (4) are respectively provided with a connecting groove one (7), a connecting groove two (8) and a connecting groove three (9), the connecting groove one (7), the connecting groove two (8) and the connecting groove three (9) are communicated, and the connecting groove one (7), the connecting groove two (8) and the connecting groove three (9) are provided with a buckle unit capable of clamping the protective layer body (5) on the bottom plate (25) of the auxiliary spring (4), and the protective layer assembly is detachably connected to the bottom plate (25) of the auxiliary spring (4) through the buckle unit.

2. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 1, characterized in that, The protective layer body (5) comprises a wear indicating layer, and the wear indicating layer is arranged at a wear critical thickness, and the wear indicating layer is embedded with a wear indicating sheet (10).

3. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 2, characterized in that, The buckle unit comprises a spring body (11) arranged in the connecting groove one (7) and a sliding table (12) connected to the spring body (11), the spring body (11) is arranged in the inner end of the sliding table (12), the sliding table (12) is provided with a clamping table (13) near the spring body (11), the clamping table (13) can extend into the connecting groove three (9) from the connecting groove one (7) and the connecting groove two (8) and be buckled in the connecting groove three (9).

4. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 3, characterized in that, The clamping table (13) comprises a vertical table (14) and an inverted buckle table (15), the connecting groove three (9) comprises a communication groove (16) corresponding to the connecting groove two (8) and the connecting groove one (7) and a stepped groove (17) arranged in a stepped manner with the communication groove (16), and when the protective layer assembly is buckled, the inverted buckle table (15) is buckled on the groove bottom of the stepped groove (17).

5. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 4, characterized in that, The width of the connecting groove two (8) and the communication groove (16) is not less than the sum of the width of the vertical table (14) and the inverted buckle table (15), and the height of the stepped groove (17) is not less than the height of the inverted buckle table (15).

6. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 5, characterized in that, The connecting groove one (7) is communicated with the outside of the protective layer body (5), the width of the sliding table (12) is greater than the width of the connecting sleeve one, that is, the sliding table (12) can extend to the outside of the protective layer body (5); the connecting groove two (8) is not communicated with the outside of the protective layer back plate (6), and the connecting groove three (9) is not communicated with the outside of the bottom plate (25) of the auxiliary spring (4).

7. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 6, characterized in that, The protective layer back plate (6) is provided with a plurality of mounting holes (18), mounting bolts are arranged in the mounting holes (18) to connect the protective layer back plate (6) and the protective layer body (5); before the protective layer assembly is installed, the wear indicating sheet (10) is injection molded and embedded in the protective layer body (5), and then the protective layer back plate (6) is connected to the protective layer body (5) through the mounting bolts, so that the protective layer body (5) and the protective layer back plate (6) become a whole.

8. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 7, characterized in that, The protective layer back plate (6) is further provided with a fastening hole (19) located outside the protective layer body (5), and a fastening bolt (20) is arranged in the fastening hole (19) to connect the protective layer back plate (6) to the bottom plate (25) of the auxiliary spring (4).

9. The rubber suspension system with an auxiliary spring shield layer assembly according to claim 8, characterized in that, The fastening bolt (20) locks the back plate (6) on the bottom plate (25) of the auxiliary spring (4) from bottom to top, and the reverse buckling table (15) is buckled on the groove bottom of the stepped groove (17) from top to bottom; that is, the locking force of the fastening bolt (20) and the buckling force of the reverse buckling table (15) are opposite in direction, and the back plate (6) with the back plate body (5) is locked on the auxiliary spring (4) by the opposite locking force and buckling force.

10. A method of disassembling a fender assembly of a rubber suspension system with an auxiliary fender cover assembly, characterized in that, The method comprises the following steps: During installation: S1a: Place the whole of the back plate body (5) and the back plate (6) at the lower end of the auxiliary spring (4), and push the sliding table (12) inward until the clamping table (13) extends into the connecting groove three (9) and the reverse buckling table (15) is buckled on the groove bottom of the stepped groove (17), and then release the sliding table (12); S2a: Lock the fastening bolt (20) in the fastening hole (19), and connect the back plate (6) to the bottom plate (25) of the auxiliary spring (4), so as to realize the installation of the back plate assembly; During disassembly: S1b: First, remove the fastening bolt (20); S2b: Then, push the sliding table (12) inward so that the reverse buckling table (15) is separated from the stepped groove (17); S2c: Take out the whole of the back plate body (5) and the back plate (6), so as to realize the disassembly of the back plate assembly.

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