A rubber support

Abstract

The application provides a rubber support, and relates to the field of rubber supports.The rubber support comprises a top plate and a bottom plate, and a damping rubber is arranged between the top plate and the bottom plate, a plurality of main inner plates are arranged in the damping rubber, and the main inner plates are characterized in that a center hole is arranged in the center of the main inner plate, annular reinforcing grooves and annular reinforcing ribs are arranged on the main inner plate, the reinforcing ribs and the reinforcing grooves are arranged on the two end faces of the main inner plate and are oppositely arranged, the reinforcing grooves and the reinforcing ribs are coaxially arranged with the center hole, and the opening directions of the reinforcing grooves of adjacent two rings are opposite.The application can enhance the shearing capacity of the rubber support and prolong the fatigue life of the rubber support.

Description

Technical Field

[0001] This invention relates to the field of rubber bearings, and more particularly to a rubber bearing. Background Technology

[0002] Heavy-duty truck leaf spring rubber bearings are located between the axle and the leaf springs, used for vibration and noise reduction on bumpy roads, protecting the leaf springs and other vehicle components. Their reliability directly affects the vehicle's vibration and noise reduction performance and driving safety. Chassis leaf spring rubber bearings operate in harsh environments, often subjected to prolonged high temperatures, heavy loads, and impacts; therefore, the reliability design of chassis leaf spring rubber bearings is crucial.

[0003] In the existing technology, rubber bearings adopt a layered rubber joint. The basic structural form of the rubber bearing is two end plates, with a circular, near-circular or rectangular rubber body in the middle. Multiple parallel and spaced steel plates are evenly distributed in the rubber body. The lower end plate has holes at the four corners, which are connected to the steel plate spring guide seats welded to the bridge shell by bolts. Under the premise of providing effective support, it plays the role of deformation energy absorption and vibration reduction.

[0004] However, heavy commercial vehicles, especially engineering vehicles, are subject to relatively harsh road conditions. During the bumpy ride, the laminated rubber bearings are subjected to a combination of compression and shear fatigue. Under the combined action of heat and force, especially shear, the rubber layer undergoes excessive deformation. After exceeding the energy required for the rubber to crack, cracks appear in the rubber layer. Under the action of unbalanced fatigue, the cracks gradually expand, eventually causing the bearing to lose its load-bearing and shock-absorbing functions. Summary of the Invention

[0005] In order to solve the technical problem that rubber bearings are prone to cracking and fatigue failure in the prior art, the present invention provides a rubber bearing that can enhance the shear resistance of the rubber bearing and extend its fatigue life.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a rubber support, including a top plate and a bottom plate, wherein a shock-absorbing rubber is provided between the top plate and the bottom plate, and multiple layers of main inner plates are provided inside the shock-absorbing rubber. A central hole is provided in the center of the main inner plate, and annular reinforcing grooves and annular reinforcing ribs are provided on the main inner plate. The reinforcing ribs and the reinforcing grooves are respectively provided on the two end faces of the main inner plate and are arranged opposite to each other. The reinforcing grooves and the reinforcing ribs are both coaxially arranged with the central hole, and the opening directions of two adjacent reinforcing grooves are opposite.

[0007] This invention utilizes reinforcing grooves and ribs arranged opposite each other on the upper and lower surfaces of the main inner plate. The ribs increase the local stiffness of the main inner plate, while the reinforcing grooves allow the rubber to embed into the grooves during deformation, forming an effect similar to "mechanical anchoring." The relative arrangement of the two enhances the interlayer bonding force, reduces the risk of rubber peeling from the steel plate under shear force, and thus improves shear resistance. Furthermore, the opposite opening directions of adjacent reinforcing grooves can form a multi-stage energy dissipation mechanism under dynamic loads. The grooves in different directions alternately absorb energy, reducing the accumulation of fatigue damage, improving the lateral shear stiffness and bending stiffness of the rubber bearing, reducing the instantaneous large deformation of the rubber layer under complex working conditions, and improving the fatigue life of the laminated rubber bearing. At the same time, due to the design of the reinforcing grooves and ribs, the shear stiffness and bending stiffness are enhanced, thus enabling the main inner plate to be thinned, achieving a lightweight design for the rubber bearing.

[0008] Furthermore, the reinforcing groove is manufactured using a ring punching process, and the reinforcing rib is produced by ring punching the reinforcing groove.

[0009] This invention manufactures reinforcing grooves and reinforcing ribs through a ring punching process, ensuring material integrity while achieving material hardening, avoiding stress concentration, and improving the strength of the main inner plate.

[0010] Furthermore, the cross-section of both the reinforcing groove and the reinforcing rib is an isosceles trapezoidal structure.

[0011] This invention further enhances the shear stiffness and bending stiffness of the main inner plate by adopting an isosceles trapezoidal cross-sectional structure.

[0012] Furthermore, it also includes a central bolt, which sequentially passes through the top plate, the shock-absorbing rubber, and the bottom plate. A nut is provided at the end of the central bolt. Both the top plate and the bottom plate are provided with mounting holes. The central bolt passes through the mounting holes. The mounting holes are cup-shaped structures. The head of the central bolt and the nut are both conical structures adapted to the corresponding mounting holes. The shock-absorbing rubber is provided with a through hole, and the central bolt passes through the through hole.

[0013] By setting a bowl-shaped mounting hole and matching head and nut, the top plate and bottom plate can rotate relative to the central bolt and nut when the rubber support undergoes torsional deformation, reducing the resistance to torsional deformation of the support and better exerting the deformation energy absorption and shock absorption function of the support.

[0014] Furthermore, the shock-absorbing rubber is provided with a through hole, the central bolt passes through the through hole, and grease is provided between the central bolt and the through hole.

[0015] This invention effectively reduces friction between the center bolt and the top and bottom plates by using lubricating grease, while also preventing the center bolt from seizing with the top and bottom plates under instantaneous high loads.

[0016] Furthermore, the portion of the base plate located at the edge of the mounting hole extends toward the head of the central bolt and decreases in thickness along the extension direction.

[0017] This invention thins the material of the extended portion of the base plate, enabling the base plate to undergo elastic deformation under external force, absorbing energy and preventing energy from being transmitted to the central bolt without attenuation, thus avoiding deformation and breakage of the central bolt.

[0018] Furthermore, it also includes two secondary inner plates, which are respectively close to the top plate and the bottom plate. The number of reinforcing grooves in the secondary inner plates is less than that in the main inner plate. The diameter of the center hole of the secondary inner plate is D1, and the diameter of the center hole of the main inner plate close to the secondary inner plate is D2, where D2 < D1.

[0019] By increasing the diameter of the central hole in the sub-inner plate, this invention allows for sufficient rubber between the central hole and the materials extending from the bottom and top plates. Under external force, more rubber deforms and absorbs energy, further reducing the energy transmitted to the central bolt and extending its service life.

[0020] Furthermore, the shock-absorbing rubber wraps around the main inner plate, and the outer circumference of the shock-absorbing rubber is provided with multiple deformation grooves, which are disposed between two adjacent main inner plates and between adjacent main inner plates and the secondary inner plate.

[0021] This invention, by setting deformation grooves, can guide the deformation direction of the shock-absorbing rubber, making it more uniform and avoiding excessive local deformation, thereby extending fatigue life. At the same time, deformation grooves can increase surface area, help dissipate heat, reduce temperature, and slow down the aging process.

[0022] Furthermore, the cross-section of the deformation groove is C-shaped, and the protrusion of the deformation groove approaches the end face of the main inner plate.

[0023] This invention reduces heat generation by setting the cross-section of the deformation groove to a C-shape. At the same time, the protrusion near the main inner plate enhances interface adhesion and reduces peeling force.

[0024] Furthermore, the multiple deformation grooves are mirror images of the horizontal center plane of the rubber support.

[0025] By symmetrically arranging the multi-ring deformation grooves, this invention can make deformation more uniform, reduce local strain, and thus delay crack initiation. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradient, and reduce thermal stress. Mirror symmetry can make the stiffness distribution of the rubber support more uniform, improve isotropy, reduce performance differences in different directions, and thus improve stability and durability.

[0026] As can be seen from the above technical solutions, the present invention has the following advantages:

[0027] This invention provides a rubber bearing that, by setting reinforcing grooves and ribs on the upper and lower surfaces of the main inner plate, improves lateral shear stiffness and bending stiffness while maintaining vertical stiffness, reduces instantaneous large deformation of the rubber layer under complex working conditions, and enhances the fatigue life of the laminated rubber bearing. Simultaneously, the design of the reinforcing grooves and ribs enhances shear stiffness and bending stiffness, thus allowing for a thinner main inner plate design and achieving lightweighting of the rubber bearing. The reinforcing grooves and ribs are manufactured using a ring-punching process, ensuring material integrity and achieving material hardening, avoiding stress concentration, and improving the strength of the main inner plate. The use of an isosceles trapezoidal cross-section further enhances the bearing's strength. The structure further enhances the shear and bending stiffness of the main inner plate; by setting bowl-shaped mounting holes and matching heads and nuts, the top and bottom plates can rotate relative to the central bolts and nuts when the rubber support undergoes torsional deformation, reducing the resistance to torsional deformation and better utilizing the deformation energy absorption and vibration damping function of the support; the use of grease effectively reduces the friction between the central bolts and the top and bottom plates, while preventing the central bolts from seizing with the top and bottom plates under instantaneous large loads; by thinning the material of the extended part of the bottom plate, the bottom plate can undergo elastic deformation under external forces, absorbing energy and preventing energy leakage. The attenuated energy transmitted to the central bolt causes deformation and breakage. Increasing the diameter of the central hole in the inner sub-plate allows for sufficient rubber between the central hole and the extended materials of the bottom and top plates. This allows more rubber to deform and absorb energy under external force, further reducing the energy transmitted to the central bolt and extending its service life. Deformation grooves guide the deformation direction of the damping rubber, making it more uniform and preventing excessive local deformation, thus extending fatigue life. Simultaneously, the deformation grooves increase surface area, aiding heat dissipation, lowering temperature, and slowing the aging process. Furthermore, by increasing the cross-sectional area of ​​the deformation grooves… The C-shaped surface generates less heat, and the protrusion near the main inner plate enhances interfacial adhesion, reduces peeling force, and helps extend service life. The C-shaped cross-section of the deformation groove also reduces heat generation, and the proximity of the protrusion to the main inner plate further enhances interfacial adhesion and reduces peeling force. Furthermore, the symmetrical arrangement of multiple deformation grooves at their centers ensures more uniform deformation, reduces localized strain, and thus delays crack initiation. The symmetrical structure also improves heat dissipation, reduces temperature gradients, and decreases thermal stress. Mirror symmetry allows for a more uniform stiffness distribution in the rubber bearing, improving isotropy and reducing performance differences in different directions, thereby enhancing stability and durability. Attached Figure Description

[0028] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the main inner plate in a specific embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the sub-inner plate in a specific embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of Comparative Examples 1-5.

[0033] In the diagram, 1 is the top plate; 2 is the bottom plate; 3 is the main inner plate; 301 is the reinforcing rib; 302 is the reinforcing groove; 4 is the shock-absorbing rubber; 5 is the center bolt; 6 is the nut; 7 is the secondary inner plate; 8 is the lubricating grease; and 9 is the deformation groove. Detailed Implementation

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Specific Implementation Method 1

[0036] like Figure 1As shown in the figure, this specific embodiment provides a rubber bearing, including a top plate 1, a bottom plate 2, a shock-absorbing rubber 4, a central bolt 5, and a main inner plate 3. The shock-absorbing rubber 4 is disposed between the top plate 1 and the bottom plate 2. Multiple layers of main inner plates 3 are disposed within the shock-absorbing rubber 4. A central hole is provided in the center of the main inner plate 3. Annular reinforcing grooves 302 and annular reinforcing ribs 301 are provided on the main inner plate 3. The reinforcing ribs 301 and the reinforcing grooves 302 are respectively disposed on the two end faces of the main inner plate 3 and are arranged opposite to each other. All reinforcing ribs 301 are coaxially arranged with the central hole, and the opening directions of the reinforcing grooves 302 in two adjacent rings are opposite. The central bolt 5 passes through the top plate 1, the shock-absorbing rubber 4 and the bottom plate 2 in sequence. The end of the central bolt 5 is provided with a nut 6. Both the top plate 1 and the bottom plate 2 are provided with mounting holes, which are coaxially arranged with the central hole. In this specific embodiment, the reinforcing ribs 301 are provided on the upper end surface of the main inner plate 3 near the central hole, and the reinforcing grooves 302 are provided on the upper end surface away from the central hole. The lower end surface is arranged opposite to the upper end surface.

[0037] Existing heavy-duty vehicle leaf spring rubber bearings typically employ a simple multi-layer steel plate and rubber composite structure, lacking geometric optimization of the main inner plate. Their shear resistance primarily relies on the bond strength between the rubber and the steel plate. Long-term use can lead to delamination due to bond failure or rubber aging, resulting in decreased shear resistance. This specific embodiment addresses this by providing reinforcing grooves 302 and reinforcing ribs 301 on the upper and lower sides of the main inner plate 3. The reinforcing ribs 301 improve the local stiffness of the main inner plate, while the reinforcing grooves 302 allow the rubber to embed within the grooves during deformation, creating a "mechanical anchoring" effect. The relative arrangement of these two elements enhances the interlayer bonding force. This design reduces the risk of rubber peeling from the steel plate under shear force, thereby improving shear resistance. Furthermore, the opposite opening directions of adjacent reinforcing grooves 302 can form a multi-stage energy dissipation mechanism under dynamic loads. The grooves in different directions alternately absorb energy, reducing fatigue damage accumulation, improving the lateral shear stiffness and bending stiffness of the rubber bearing, reducing the instantaneous large deformation of the rubber layer under complex working conditions, and improving the fatigue life of the laminated rubber bearing. At the same time, the design of the reinforcing grooves 302 and reinforcing ribs 301 enhances the shear stiffness and bending stiffness, thus enabling the thinning design of the main inner plate and achieving lightweighting of the rubber bearing.

[0038] like Figure 1As shown, in this specific embodiment, the main inner plate 3 is provided with five layers. Each layer of the main inner plate 3 has two rings of reinforcing grooves 302 on its upper surface and two rings of reinforcing ribs 301 on its lower surface. It can be understood that, depending on the diameter of the rubber support, more than two rings of reinforcing grooves 302 and reinforcing ribs 301 can be provided. The reinforcing grooves 302 near the center hole open upwards, and the reinforcing grooves 302 away from the center hole open downwards. Furthermore, the groove width of the reinforcing grooves 302 is 4mm~6mm, and the height of the reinforcing ribs 301 is 2mm~4mm. The outer ring of reinforcing grooves 302 is 6mm~10mm away from the edge of the main inner plate 3, and the inner ring of reinforcing grooves 302 is more than 10mm away from the edge of the center hole. Moreover, the reinforcing grooves 302 of the multiple layers of the main inner plate 3 are in the same radial position. The main inner plate 3 is vulcanized and connected to the shock-absorbing rubber 4. Vulcanization holes are provided on the main inner plate 3.

[0039] The main inner plate 3 with reinforcing groove 302 and reinforcing rib 301 can be manufactured using a casting process. In this specific embodiment, the reinforcing groove 302 is manufactured using a ring punching process, and the reinforcing rib 301 is generated by ring punching the reinforcing groove 302. Manufacturing the reinforcing groove 302 and reinforcing rib 301 using the ring punching process ensures material integrity, achieves material hardening, avoids stress concentration, and improves the strength of the main inner plate 3. The cross-section of the reinforcing groove 302 and the cross-section of the reinforcing rib 301 can be semi-circular, but in this specific embodiment, the cross-section of the reinforcing groove 302 and the cross-section of the reinforcing rib 301 are both isosceles trapezoidal structures. By adopting the isosceles trapezoidal cross-section structure, the shear stiffness and bending stiffness of the main inner plate 3 are further enhanced.

[0040] like Figure 1 As shown, since the rubber bearing will undergo torsional deformation during operation, in order to reduce deformation resistance and better utilize the deformation energy absorption and vibration damping function of the rubber bearing, in this specific embodiment, the mounting holes of the top plate 1 and the bottom plate 2 are bowl-shaped structures, and the head of the central bolt 5 and the nut 6 are both conical structures adapted to the corresponding mounting holes. By setting the bowl-shaped mounting holes and the adapted heads and nuts 6, the top plate 1 and the bottom plate 2 can rotate relative to the central bolt 5 and the nut 6 when the rubber bearing undergoes torsional deformation, and the frictional resistance is small, which reduces the resistance of the torsional deformation of this bearing and reduces the adverse effects of the central bolt 5 on the top plate 1 and the nut 6 on the bottom plate 2.

[0041] like Figure 1 As shown, preferably, the shock-absorbing rubber 4 is provided with a through hole, the central bolt 5 passes through the through hole, and grease 8 is provided between the central bolt 5 and the through hole; by providing grease 8, the friction between the central bolt 5 and the top plate 1 and the bottom plate 2 is effectively reduced, and at the same time, under instantaneous large load, the grease 8 can continuously enter the gap between the bottom plate 2 and the nut 6 and between the top plate 1 and the head, thus avoiding the occurrence of seizing phenomenon.

[0042] Furthermore, the nut 6 is welded to the center bolt 5, which enables a better loosening effect and ensures the locking effect of the center bolt 5 on the multi-layer main inner plate 3 and the shock-absorbing rubber 4.

[0043] like Figure 4 As shown, the inventors conducted simulation tests and fatigue strength tests on this specific embodiment and other comparative examples (changing the position of the reinforcing rib 301 and the reinforcing groove 302, the opening orientation of the reinforcing groove 302, and the cross-sectional shape), and obtained the following structure:

[0044]

[0045] Note: The lifespan ratio refers to the ratio of the fatigue life of the corresponding model to that of the model in the background technology.

[0046] The simulation test conditions were room temperature, vertical preload of 26 tons, and 1.5 Hz; the fatigue test conditions were vertical preload of 26 tons, 1.5 Hz, and the outer surface temperature of the sample did not exceed 80°C.

[0047] In Comparative Example 1, the two reinforcing grooves 302 are oriented upwards; in Comparative Example 2, the two reinforcing grooves 302 are oriented in opposite directions, with the outer ring facing upwards and the inner ring facing downwards; in Comparative Example 3, the two reinforcing grooves 302 are oriented downwards; the cross-sections of the reinforcing grooves 302 and reinforcing ribs 301 in Comparative Examples 1-3 are all isosceles trapezoids; in Comparative Example 4, the two reinforcing grooves 302 are oriented downwards and the cross-section of the reinforcing grooves 302 is semi-circular; in Comparative Example 5, the two reinforcing grooves 302 are oriented in opposite directions, with the outer ring facing downwards and the inner ring facing upwards, and the cross-section of the reinforcing grooves 302 is semi-circular; the position, height, and groove width of the reinforcing grooves 302 in Comparative Examples 1-5 are the same as those in this specific embodiment.

[0048] Through experiments, it can be concluded that the strength and fatigue life of this specific embodiment are significantly improved. Specific Implementation Method Two

[0050] like Figure 1 As shown, this specific embodiment provides a rubber support, which is basically the same in structure as the first specific embodiment. The difference is that the part of the base plate 2 located at the edge of the mounting hole extends towards the head of the central bolt 5 and the thickness decreases along the extension direction. By thinning the material of the extended part of the base plate 2, the base plate 2 can more easily undergo elastic deformation under external force, absorb energy, and avoid the energy being transferred to the central bolt 5 without attenuation. After long-term use, this will cause the central bolt 5 to deform and break.

[0051] In this specific embodiment, the material of the top plate 1 extends inward to the damping rubber 4 around the mounting hole. When the upper part of the support is subjected to shearing action, the protruding part of the top plate 1 deforms and absorbs energy, thus preventing fatigue fracture of the head of the central bolt 5.

[0052] like Figure 1 and Figure 3 As shown, furthermore, to avoid excessive compression of the inner plate on the inward protruding parts of the top plate 1 and bottom plate 2, causing plastic deformation, this specific embodiment also includes two secondary inner plates 7. The two secondary inner plates 7 are respectively close to the top plate 1 and the bottom plate 2. Five layers of main inner plates 3 are arranged between the two secondary inner plates 7. The reinforcing grooves 302 of the secondary inner plates 7 have fewer turns than those of the main inner plates 3. In this specific embodiment, only one reinforcing groove 302 is provided on the upper end surface of the secondary inner plate 7. The diameter of the center hole of the secondary inner plate 7 is D1, and the diameter of the center hole of the main inner plate 3 close to the secondary inner plate 7 is D2, where D2 < D1. By increasing the diameter of the center hole of the secondary inner plate 7, there can be enough rubber between the center hole of the secondary inner plate 7 and the material extending from the bottom plate 2 and the top plate 1. Under the action of external force, more rubber will deform and absorb energy, deforming and absorbing energy together with the top plate 1 and the bottom plate 2, further reducing the energy transmitted to the central bolt 5 and extending the service life of the central bolt 5.

[0053] In this specific embodiment, the width of the reinforcing groove 302 of the sub-inner plate 7 is 4mm~6mm, the height of the reinforcing rib 301 is 2mm~4mm, the distance between the reinforcing groove 302 and the edge of the sub-inner plate 7 is 6mm~10mm, the reinforcing groove 302 is aligned with the reinforcing groove 302 of the main inner plate 3, and vulcanization holes are provided on the sub-inner plate 7. Specific Implementation Method 3

[0055] like Figure 1 As shown, this specific embodiment provides a rubber support, which is basically the same in structure as the second specific embodiment, except that: the shock-absorbing rubber 4 wraps the main inner plate 3 inside, and the outer circumference of the shock-absorbing rubber 4 is provided with multiple deformation grooves 9, the number of deformation grooves 9 being the same as the number of the main inner plate 3 and the secondary inner plate 7.

[0056] When the rubber support begins to bear force, the main and auxiliary inner plates 7 do not deform. The rubber in the sandwich support deforms significantly after being squeezed out. If the edge of the damping rubber 4 is flush with the main and auxiliary inner plates 7, the rubber material at the edge is stretched more when it is squeezed out, which is prone to exceeding the limit strain and cracking. In this specific embodiment, by setting the deformation groove 9, the deformation direction of the damping rubber 4 can be guided to make it more uniform and avoid excessive local deformation, thereby extending the fatigue life. At the same time, the deformation groove can increase the surface area, help dissipate heat, reduce temperature, and slow down the aging process.

[0057] like Figure 1 As shown, in this specific embodiment, the cross-section of the deformation groove 9 is C-shaped, and the protrusion of the deformation groove 9 is close to the end face of the main inner plate. In this specific embodiment, by setting the deformation groove 9 with a C-shaped structure, less heat is generated. At the same time, the protrusion being close to the main inner plate can enhance the interface adhesion and reduce the peeling force.

[0058] Furthermore, the multiple deformation grooves 9 are arranged symmetrically about the horizontal center plane of the rubber bearing. By symmetrically arranging the multiple deformation grooves 9, the deformation can be more uniform, local strain can be reduced, thereby delaying the occurrence of cracks. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradient, and reduce thermal stress. Mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, reduce performance differences in different directions, thereby improving stability and durability.

[0059] The manufacturing process of this rubber bearing is as follows:

[0060] S01: Place the preheated metal main and auxiliary inner plates 7 (70℃~80℃) into the mold;

[0061] S02: After mold closing, inject a fixed amount of natural rubber material and then lock the mold;

[0062] S03: Vulcanize at a set temperature for a set time;

[0063] S04: Open the mold and remove the parts, clean the glue edges;

[0064] S06: Preload 4mm~6mm, insert the center bolt 5 with lubricated grease 8;

[0065] S07: After the nut 6 is tightened with the center bolt 5, the circumference is welded to lock it in place.

[0066] As can be seen from the above specific embodiments, the present invention has the following beneficial effects:

[0067] 1. By setting reinforcing grooves 302 and reinforcing ribs 301 on the upper and lower sides of the main inner plate 3, the transverse shear stiffness and bending stiffness can be improved while ensuring that the vertical stiffness remains unchanged, the instantaneous large deformation of the rubber layer under complex working conditions can be reduced, and the fatigue life of the laminated rubber bearing can be improved. At the same time, due to the design of reinforcing grooves 302 and reinforcing ribs 301, the shear stiffness and bending stiffness are enhanced, thus enabling the main inner plate 3 to be thinned and the rubber bearing to be lightweight.

[0068] 2. The reinforcing groove 302 and reinforcing rib 301 are manufactured by ring punching, which ensures the integrity of the material, hardens the material, avoids stress concentration, and improves the strength of the main inner plate 3.

[0069] 3. By adopting an isosceles trapezoidal cross-sectional structure, the shear stiffness and bending stiffness of the main inner plate 3 are further enhanced;

[0070] 4. By setting bowl-shaped mounting holes and matching heads and nuts 6, the top plate 1 and bottom plate 2 can rotate relative to the central bolts 5 and nuts 6 when the rubber bearing undergoes torsional deformation, reducing the resistance to torsional deformation of the bearing and better exerting the deformation energy absorption and shock absorption function of the bearing.

[0071] 5. By setting grease 8, the friction between the center bolt 5 and the top plate 1 and the bottom plate 2 is effectively reduced, and the center bolt 5 is prevented from seizing with the top plate 1 and the bottom plate 2 under instantaneous large loads.

[0072] 6. By thinning the material of the extended portion of the base plate 2, the base plate 2 can undergo elastic deformation under external force, absorb energy, and prevent energy from being transferred to the central bolt 5 without attenuation, thus preventing the central bolt 5 from deforming and breaking.

[0073] 7. By increasing the diameter of the central hole of the sub-inner plate 7, there can be enough rubber between the central hole of the sub-inner plate 7 and the material extending from the bottom plate 2 and the top plate 1. Under the action of external force, more rubber will deform and absorb energy, further reducing the energy transmitted to the central bolt 5 and extending the service life of the central bolt 5.

[0074] 8. By setting the deformation groove 9, the deformation direction of the shock-absorbing rubber can be guided, making it more uniform and avoiding excessive local deformation, thereby extending fatigue life. At the same time, the deformation groove can increase the surface area, help dissipate heat, reduce temperature, and slow down the aging process. The elongation rate of the rubber material at the edge of the pressure extrusion process is low at the contact position between the rubber material and the main and auxiliary inner plates 7, and the probability of edge rubber layer cracking is low, which is less likely to induce edge cracking of the shock-absorbing rubber 4.

[0075] 9. By setting the cross-section of the deformation groove 9 to C-shape, less heat is generated. At the same time, the protrusion is close to the main inner plate, which can enhance the interface adhesion and reduce the peeling force.

[0076] 10. By setting the multi-ring deformation groove 9 in a centrally symmetrical manner, the deformation can be made more uniform, reducing local strain and thus delaying crack initiation. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradient, and reduce thermal stress. Mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, reduce performance differences in different directions, and thus improve stability and durability.

[0077] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rubber bearing, comprising a top plate (1) and a bottom plate (2), wherein a damping rubber (4) is disposed between the top plate (1) and the bottom plate (2), and multiple layers of main inner plates (3) are disposed within the damping rubber (4), characterized in that, The main inner plate (3) has a central hole, and the main inner plate (3) has an annular reinforcing groove (302) and an annular reinforcing rib (301). The reinforcing rib (301) and the reinforcing groove (302) are respectively located on the two end faces of the main inner plate (3) and are arranged opposite to each other. The reinforcing groove (302) and the reinforcing rib (301) are both coaxial with the central hole, and the opening directions of two adjacent reinforcing grooves (302) are opposite. The main inner plate (302) also includes a central bolt (5), which passes through the top plate (1), the shock-absorbing rubber (4) and the bottom plate (2) in sequence. The center bolt (5) is provided with a nut (6) at its end. The top plate (1) and the bottom plate (2) are provided with mounting holes. The shock-absorbing rubber (4) is provided with a through hole. The center bolt (5) passes through the through hole. It also includes two secondary inner plates (7). The two secondary inner plates (7) are close to the top plate (1) and the bottom plate (2) respectively. The reinforcing groove (302) of the secondary inner plate (7) has fewer turns than that of the main inner plate (3). The diameter of the center hole of the secondary inner plate (7) is D1. The diameter of the center hole of the main inner plate (3) close to the secondary inner plate (7) is D2. D2 < D1.

2. The rubber bearing as described in claim 1, characterized in that, The reinforcing groove (302) is manufactured using a ring punching process, and the reinforcing rib (301) is generated by ring punching the reinforcing groove (302).

3. The rubber bearing as described in claim 2, characterized in that, The cross-sections of the reinforcing groove (302) and the reinforcing rib (301) are both isosceles trapezoidal structures.

4. The rubber bearing as described in any one of claims 1-3, characterized in that, The central bolt (5) passes through the mounting hole, which is a bowl-shaped structure. The head of the central bolt (5) and the nut (6) are both conical structures adapted to the corresponding mounting hole.

5. The rubber bearing as described in claim 4, characterized in that, Lubricating grease (8) is provided between the center bolt (5) and the through hole.

6. The rubber bearing as described in claim 4, characterized in that, The portion of the base plate (2) located at the edge of the mounting hole extends toward the head of the center bolt (5) and decreases in thickness along the extension direction.

7. The rubber bearing as described in claim 6, characterized in that, The shock-absorbing rubber (4) wraps the main inner plate (3) inside. The outer circumference of the shock-absorbing rubber (4) is provided with multiple deformation grooves (9). The deformation grooves (9) are provided between two adjacent main inner plates (3) and between the adjacent main inner plate (3) and the secondary inner plate (7).

8. The rubber bearing as described in claim 7, characterized in that, The cross-section of the deformation groove (9) is C-shaped, and the protrusion of the deformation groove (9) approaches the end face of the main inner plate (3).

9. The rubber bearing as described in claim 8, characterized in that, The deformation groove (9) is mirrored about the horizontal center plane of the rubber support.

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