Rubber support

Abstract

The invention provides a rubber support, relates to the field of rubber supports, and adopts the scheme that the rubber support comprises a top plate and a bottom plate, damping rubber is arranged between the top plate and the bottom plate, a plurality of layers of main inner plates are arranged in the damping rubber, and the rubber support is characterized in that a center hole is formed in the center of each main inner plate; the main inner plate is provided with an annular reinforcing groove and an annular reinforcing rib, the reinforcing rib and the reinforcing groove are formed in the two end faces of the main inner plate respectively and arranged oppositely, the reinforcing groove and the reinforcing rib are coaxial with the center hole, and the opening directions of every two adjacent circles of reinforcing grooves are opposite. The shear resistance of the rubber support can be enhanced, and the fatigue life of the rubber support can be prolonged.

Description

Technical Field

[0001] The invention relates to the field of rubber bearings, and in particular to a rubber bearing. Background Art

[0002] The heavy-duty vehicle leaf spring rubber bearing is located between the axle and the leaf spring. It is used to reduce vibration and noise when the heavy truck is on bumpy roads, and protect the leaf spring and other parts of the vehicle. Its reliability directly affects the vehicle's vibration and noise reduction performance and driving safety. The chassis leaf spring rubber bearing has a harsh working environment, often with long-term high temperature, heavy load and impact, so the reliability design of the chassis leaf spring rubber bearing is very important.

[0003] In the prior art, the rubber bearing adopts a laminated rubber joint. The basic structural form of the rubber bearing is an upper and lower end plate with a circular, nearly circular or rectangular rubber body in the middle. The rubber body is evenly distributed with multiple parallel and mutually spaced steel plates. There are holes at the four corners of the lower end plate, which are connected to the steel leaf spring guide seat welded on the bridge housing through bolts, so as to play the role of deformation energy absorption and shock reduction while providing effective support.

[0004] However, the road conditions of heavy-duty commercial vehicles, especially engineering vehicles, are relatively harsh. During the bumpy process, the laminated rubber bearings are subjected to compression-shear combined fatigue. Under the thermal-mechanical coupling, especially the shear action, the rubber layer undergoes extremely large deformation. When the energy required for the rubber to crack is exceeded, cracks appear in the rubber layer. Under the action of unbalanced force fatigue, the cracks gradually expand, eventually causing the bearings to lose their load-bearing and shock-absorbing functions. Summary of the invention

[0005] In order to solve the technical problem in the prior art that the rubber bearing is prone to crack fatigue failure, 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 bearing, comprising a top plate and a bottom plate, a shock-absorbing rubber is arranged between the top plate and the bottom plate, a plurality of main inner plates are arranged inside the shock-absorbing rubber, a center hole is arranged at the center of the main inner plate, an annular reinforcement groove and annular reinforcement ribs are arranged on the main inner plate, the reinforcement ribs and the reinforcement groove are respectively arranged on the two end surfaces of the main inner plate and are arranged opposite to each other, the reinforcement groove and the reinforcement ribs are both coaxially arranged with the center hole, and the opening directions of the reinforcement grooves of two adjacent circles are opposite.

[0007] The present invention arranges reinforcing grooves and reinforcing ribs relatively on the upper and lower parts of the main inner plate. The reinforcing ribs improve the local stiffness of the main inner plate, and the reinforcing grooves allow the rubber to be embedded in the grooves when deformed, forming an effect similar to "mechanical anchoring". The relative arrangement of the two enhances the interlayer bonding force and reduces the risk of peeling between the rubber and the steel plate under the action of shear force, thereby improving the shear resistance. In addition, the opening directions of adjacent reinforcing grooves are opposite, and a multi-level energy dissipation mechanism can be formed under dynamic loads. The grooves in different directions alternately absorb energy, reduce the accumulation of fatigue damage, improve the lateral shear stiffness and bending stiffness of the rubber bearing, reduce the instantaneous large deformation of the rubber layer under complex working conditions, and improve the fatigue life of the laminated rubber bearing. At the same time, due to the design of the reinforcing grooves and reinforcing ribs, the shear stiffness and bending stiffness are enhanced, so that the main inner plate can be designed to be thinned and the rubber bearing can be lightweight.

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

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

[0010] Furthermore, the cross-section of the reinforcement groove and the cross-section of the reinforcement rib are both isosceles trapezoidal structures.

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

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

[0013] The present invention provides a bowl-shaped mounting hole and a matching head and nut, so that when the rubber bearing undergoes torsional deformation, the top plate and the bottom plate can rotate relative to the center bolt and the nut, thereby reducing the resistance to torsional deformation of the bearing and better exerting the deformation energy absorption and shock reduction effect of the bearing.

[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] The present invention effectively reduces the friction between the central bolt and the top plate and the bottom plate by arranging the lubricating grease, and simultaneously avoids the central bolt from biting with the top plate and the bottom plate under instantaneous large load.

[0016] Furthermore, the portion of the bottom plate located at the edge of the mounting hole extends toward the head of the central bolt and has a thickness that decreases along the extending direction.

[0017] The present invention reduces the thickness of the material of the extended portion of the bottom plate, so that the bottom plate can be elastically deformed under the action of external force, absorb energy, and avoid the energy being transmitted to the center bolt without attenuation, causing deformation and fracture of the center bolt.

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

[0019] By increasing the diameter of the center hole of the sub-inner plate, the present invention can ensure that there is enough rubber between the center hole of the sub-inner plate and the material extending from the bottom plate and the top plate. Under the action of external force, more rubber can be deformed to absorb energy, further reducing the energy transmitted to the center bolt and extending the service life of the center bolt.

[0020] Furthermore, the shock-absorbing rubber wraps the main inner plate inside, and a plurality of deformation grooves are arranged on the outer circumference of the shock-absorbing rubber. The deformation grooves are arranged between two adjacent main inner plates and between the adjacent main inner plate and the auxiliary inner plate.

[0021] The present invention can guide the deformation direction of the shock-absorbing rubber by arranging the deformation groove, making it more uniform and avoiding local excessive 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.

[0022] Furthermore, the cross section of the deformation groove is a C-shaped structure, and the protrusion of the deformation groove leans against the end surface of the main inner plate.

[0023] The present invention sets the cross section of the deformation groove to be C-shaped, thereby generating less heat. Meanwhile, the protrusion is close to the main inner plate, which can enhance the interface adhesion and reduce the peeling force.

[0024] Furthermore, the multiple circles of deformation grooves are mirror-arranged about the horizontal center plane of the rubber support.

[0025] The present invention can make deformation more uniform and reduce local strain by arranging multiple circles of deformation grooves symmetrically, thereby delaying the occurrence of cracks. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradients, and reduce thermal stress. The mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, and reduce performance differences in different directions, thereby improving stability and durability.

[0026] It can be seen from the above technical solutions that the present invention has the following advantages: The present invention provides a rubber bearing. By relatively arranging reinforcing grooves and reinforcing ribs above and below the main inner plate, it is possible to improve the lateral shear stiffness and bending stiffness, reduce the instantaneous large deformation of the rubber layer under complex working conditions, and improve the fatigue life of the laminated rubber bearing under the premise of ensuring that the vertical stiffness remains unchanged. At the same time, due to the design of the reinforcing grooves and reinforcing ribs, the shear stiffness and bending stiffness are enhanced, so that the main inner plate can be designed to be thinned and the rubber bearing can be lightweight. The reinforcing grooves and reinforcing ribs are manufactured by the ring punching process, so that the integrity of the material is ensured, and at the same time, the material is hardened, stress concentration is avoided, and the strength of the main inner plate is improved. By adopting an isosceles trapezoidal cross-section The structure can further enhance the shear stiffness and bending stiffness of the main inner plate; by setting a bowl-shaped mounting hole and a matching head and nut, when the rubber bearing is torsionally deformed, the top plate and the bottom plate can rotate relative to the center bolt and the nut, thereby reducing the resistance to torsional deformation of the bearing and better exerting the deformation energy absorption and shock absorption function of the bearing; by setting grease, the friction between the center bolt and the top plate and the bottom plate can be effectively reduced, while avoiding the center bolt from biting with the top plate and the bottom plate under instantaneous large loads; by thinning the material of the extended part of the bottom plate, the bottom plate can be elastically deformed under the action of external force to absorb energy and avoid energy instability The attenuated energy is transmitted to the center bolt, causing the center bolt to deform and break; by increasing the diameter of the center hole of the sub-inner plate, there can be enough rubber between the center hole of the sub-inner plate and the material extending from the bottom plate and the top plate, so that under the action of external force, more rubber can deform to absorb energy, further reducing the energy transmitted to the center bolt and extending the service life of the center bolt; by setting the deformation groove, the deformation direction of the shock-absorbing rubber can be guided to make it more uniform, avoiding local excessive 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; by The surface is set to C-shape, which generates less heat. At the same time, the protrusion is close to the main inner plate to enhance interface bonding, reduce peeling force, and is beneficial to extending service life; by setting the cross-section of the deformation groove to C-shape, less heat is generated. At the same time, the protrusion is close to the main inner plate to enhance interface bonding and reduce peeling force; by arranging multiple circles of deformation grooves symmetrically, the deformation can be more uniform, reducing local strain and thus delaying the occurrence of cracks. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradients, and reduce thermal stress. Mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, and reduce performance differences in different directions, thereby improving stability and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a specific implementation mode 1 of the present invention.

[0029] Figure 2 It is a schematic structural diagram of the main inner plate in the first specific implementation mode of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the auxiliary inner plate in the first specific implementation mode of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of comparative examples 1-5.

[0032] In the figure, 1, top plate; 2, bottom plate; 3, main inner plate; 301, reinforcing ribs; 302, reinforcing grooves; 4, shock-absorbing rubber; 5, center bolt; 6, nut; 7, auxiliary inner plate; 8, grease; 9, deformation groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent. Specific implementation method 1 like Figure 1As shown, 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, wherein the shock-absorbing rubber 4 is arranged between the top plate 1 and the bottom plate 2, and multiple layers of main inner plates 3 are arranged in the shock-absorbing rubber 4, wherein a central hole is arranged at the center of the main inner plate 3, and an annular reinforcement groove 302 and an annular reinforcement rib 301 are arranged on the main inner plate 3, wherein the reinforcement rib 301 and the reinforcement groove 302 are respectively arranged at the two end surfaces of the main inner plate 3 and are arranged opposite to each other, and the reinforcement groove 302 and the The reinforcing ribs 301 are all coaxially arranged with the center hole, and the opening directions of the reinforcing grooves 302 of two adjacent circles are opposite. The center bolt 5 passes through the top plate 1, the shock-absorbing rubber 4 and the bottom plate 2 in sequence. A nut 6 is arranged at the end of the center bolt 5. The top plate 1 and the bottom plate 2 are both provided with mounting holes, and the mounting holes are coaxially arranged with the center hole. In the present specific embodiment, the reinforcing ribs 301 are arranged at the position of the upper end face of the main inner plate 3 close to the center hole, the reinforcing grooves 302 are arranged at the position of the upper end face away from the center hole, and the lower end face is arranged opposite to the upper end face.

[0035] Existing heavy-duty vehicle leaf spring rubber bearings usually adopt a simple multi-layer steel plate and rubber laminated structure, lacking geometric optimization of the main inner plate, and its shear resistance mainly depends on the bonding strength between the rubber and the steel plate. Long-term use is prone to delamination due to bonding failure or rubber aging, and the shear resistance decreases. This specific implementation method arranges reinforcing grooves 302 and reinforcing ribs 301 relatively on the upper and lower sides of the main inner plate 3. The reinforcing ribs 301 increase the local stiffness of the main inner plate, and the reinforcing grooves 302 allow the rubber to be embedded in the grooves when deformed, forming an effect similar to "mechanical anchoring". The relative arrangement of the two enhances the interlayer bonding force. , reducing the risk of peeling between rubber and steel plate under shear force, thereby improving shear resistance, and the opening directions of adjacent reinforcement grooves 302 are opposite, which can form a multi-level energy dissipation mechanism under dynamic load. The grooves in different directions alternately absorb energy, reduce fatigue damage accumulation, improve the lateral shear stiffness and bending stiffness of the rubber bearing, reduce the instantaneous large deformation of the rubber layer under complex working conditions, and improve the fatigue life of the laminated rubber bearing. At the same time, due to the design of the reinforcement groove 302 and the reinforcement rib 301, the shear stiffness and bending stiffness are enhanced, so that the main inner plate can be designed to be thinned to achieve lightweight rubber bearings.

[0036] like Figure 1As shown, in this specific embodiment, the main inner panel 3 is provided with five layers, and each layer of the main inner panel 3 is provided with two circles of reinforcing grooves 302 on the upper surface, and two circles of reinforcing ribs 301 on the lower surface. It can be understood that, according to the diameter of the rubber bearing, more than two circles of reinforcing grooves 302 and reinforcing ribs 301 can be provided; the reinforcing grooves 302 close to the center hole are opened upward, and the reinforcing grooves 302 away from the center hole are opened downward, and the groove width of the reinforcing grooves 302 is 4mm~6mm, the height of the reinforcing ribs 301 is 2mm~4mm, the outer circle of the reinforcing grooves 302 is 6mm~10mm away from the edge of the main inner panel 3, and the inner circle of the reinforcing grooves 302 is more than 10mm away from the edge of the center hole; and the reinforcing grooves 302 of the multiple layers of the main inner panel 3 are at the same radial position, the main inner panel 3 is vulcanized and connected to the shock-absorbing rubber 4, and the main inner panel 3 is provided with vulcanization holes.

[0037] The main inner panel 3 with the reinforcement groove 302 and the reinforcement rib 301 can be manufactured by a casting process. In this specific embodiment, the reinforcement groove 302 is manufactured by a ring punching process, and the reinforcement rib 301 is produced by ring punching of the reinforcement groove 302. The reinforcement groove 302 and the reinforcement rib 301 are manufactured by the ring punching process, which ensures the integrity of the material and realizes material hardening at the same time, avoids stress concentration, and improves the strength of the main inner panel 3. The cross-section of the reinforcement groove 302 and the cross-section of the reinforcement rib 301 can be semicircular, but in this specific embodiment, the cross-section of the reinforcement groove 302 and the cross-section of the reinforcement rib 301 are both isosceles trapezoidal structures. By adopting the isosceles trapezoidal cross-sectional structure, the shear stiffness and bending stiffness of the main inner panel 3 are further enhanced.

[0038] like Figure 1 As shown, since the rubber bearing will produce torsional deformation during its operation, in order to reduce the deformation resistance and better play the role of deformation energy absorption and shock absorption 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 center bolt 5 and the nut 6 are both conical structures adapted to the corresponding mounting holes; by providing a bowl-shaped mounting hole and a matching head and nut 6, when the rubber bearing undergoes torsional deformation, the top plate 1 and the bottom plate 2 can rotate relative to the center bolt 5 and the nut 6, and the friction resistance is small, thereby reducing the resistance to torsional deformation of the bearing and reducing the adverse effects of the center bolt 5 on the top plate 1 and the nut 6 on the bottom plate 2.

[0039] like Figure 1 As shown, preferably, the shock-absorbing rubber 4 is provided with a through hole, the center bolt 5 passes through the through hole, and grease 8 is provided between the center bolt 5 and the through hole; by providing the grease 8, the friction between the center bolt 5 and the top plate 1 and the bottom plate 2 is effectively reduced, and at the same time, the grease 8 can continuously enter the gap between the bottom plate 2 and the nut 6 and the top plate 1 and the head under instantaneous large load, thereby avoiding the occurrence of biting.

[0040] Furthermore, the nut 6 is welded to the center bolt 5 , which can achieve a better loosening effect and ensure the locking effect of the center bolt 5 on the multi-layer main inner panel 3 and the shock-absorbing rubber 4 .

[0041] like Figure 4 As shown, the inventors conducted simulation tests and fatigue strength tests on this specific embodiment and other comparative examples (changing the positions of the reinforcing rib 301 and the reinforcing groove 302, the opening direction of the reinforcing groove 302, and the cross-sectional shape), and obtained the following structure:

[0042] Note: Life ratio refers to the ratio of fatigue life of the corresponding model to that of the model in the background technology.

[0043] The conditions of the simulation test are room temperature, vertical preload of 26 tons, and 1.5 Hz; the conditions of the fatigue test are vertical preload of 26 tons, 1.5 Hz, and the outer surface of the sample does not exceed 80°C.

[0044] Among them, in comparative example 1, the two reinforcement grooves 302 are oriented in the same direction and both face upward, in comparative example 2, the two reinforcement grooves 302 are oriented in opposite directions, with the outer circle upward and the inner circle downward, in comparative example 3, the two reinforcement grooves 302 are oriented in the same direction and both face downward, the cross-sections of the reinforcement grooves 302 and the reinforcement ribs 301 of comparative examples 1-3 are all isosceles trapezoidal, in comparative example 4, the two reinforcement grooves 302 are oriented in the same direction and both face downward, and the cross-section of the reinforcement grooves 302 is semicircular, in comparative example 5, the two reinforcement grooves 302 are oriented in opposite directions, with the outer circle downward and the inner circle upward, and the cross-section of the reinforcement grooves 302 is semicircular, and the position, height, and slot width of the reinforcement grooves 302 of comparative examples 1-5 are the same as those in the present specific implementation.

[0045] Through experiments, it can be concluded that the strength and fatigue life of this specific embodiment are significantly improved. Specific implementation method 2 like Figure 1 As shown, this specific embodiment provides a rubber bearing, which is basically the same as the structure of the specific embodiment one, except that: the portion on the base plate 2 and 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. By thinning the material of the extended portion of the base plate 2, the base plate 2 can be more easily elastically deformed under the action of external force, absorbing energy and preventing the energy from being transmitted to the center bolt 5 without attenuation, which would cause deformation and breakage of the center bolt 5 after long-term use.

[0047] In this specific embodiment, the material of the top plate 1 around the mounting hole extends toward the inside of the shock-absorbing rubber 4. When the upper part of the support is subjected to shearing, the protruding part of the top plate 1 toward the inside can deform and absorb energy, thereby avoiding fatigue fracture of the head of the center bolt 5.

[0048] like Figure 1 and Figure 3 As shown, further, in order to avoid excessive extrusion of the inner plate on the protruding parts of the top plate 1 and the bottom plate 2 to the inside, causing plastic deformation of the device, in this specific embodiment, two auxiliary inner plates 7 are also included, and the two auxiliary inner plates 7 are respectively close to the top plate 1 and the bottom plate 2, and the five-layer main inner plate 3 is arranged between the auxiliary inner plates 7 on both sides, and the number of reinforcing grooves 302 of the auxiliary inner plate 7 is less than that of the main inner plate 3; in this specific embodiment, only one circle of reinforcing grooves 302 is arranged on the upper end surface of the auxiliary inner plate 7, the diameter of the center hole of the auxiliary inner plate 7 is D1, and the diameter of the center hole of the main inner plate 3 close to the auxiliary inner plate 7 is D2, D2<D1, by increasing the diameter of the center hole of the auxiliary inner plate 7, it is possible to have enough rubber between the center hole of the auxiliary inner plate 7 and the material extending from the bottom plate 2 and the top plate 1, so that under the action of external force, more rubber can deform and absorb energy, and deform and absorb energy together with the top plate 1 and the bottom plate 2, thereby further reducing the energy transmitted to the center bolt 5 and extending the service life of the center bolt 5.

[0049] In this specific embodiment, the groove width of the reinforcement groove 302 of the secondary inner panel 7 is 4mm~6mm, the height of the reinforcement rib 301 is 2mm~4mm, the reinforcement groove 302 is 6mm~10mm away from the edge of the secondary inner panel 7, the reinforcement groove 302 is aligned with the reinforcement groove 302 of the main inner panel 3, and a vulcanization hole is provided on the secondary inner panel 7. Specific implementation method three like Figure 1 As shown, this specific embodiment provides a rubber bearing, which is basically the same in structure as the second specific embodiment, except that: the shock-absorbing rubber 4 wraps the main inner panel 3 inside, and the outer circumference of the shock-absorbing rubber 4 is provided with multiple circles of deformation grooves 9, and the number of circles of the deformation grooves 9 is the same as the sum of the number of the main inner panel 3 and the secondary inner panel 7.

[0051] When the rubber support begins to be subjected to force, the main and auxiliary inner panels 7 do not deform, but the rubber located in the sandwich bracket deforms greatly after being compressed and extruded. If the edge of the shock-absorbing rubber 4 is flush with the main and auxiliary inner panels 7, when the rubber is extruded, the contact position between the rubber and the inner panel at the edge is relatively stretched, which is easy to exceed the limit strain and crack. In this specific embodiment, the deformation groove 9 is set. By setting the deformation groove 9, the deformation direction of the shock-absorbing rubber 4 can be guided to make it more uniform, avoid local excessive deformation, and thus extend the fatigue life. At the same time, the deformation groove can increase the surface area, help dissipate heat, reduce the temperature, and slow down the aging process.

[0052] like Figure 1As shown, in this specific embodiment, the cross-section of the deformation groove 9 is a C-shaped structure, and the protrusion of the deformation groove 9 is close to the end face of the main inner plate; this specific embodiment generates less heat by setting the deformation groove 9 with a C-shaped structure. At the same time, the protrusion is close to the main inner plate to enhance the interface adhesion and reduce the peeling force.

[0053] Furthermore, the multiple circles of deformation grooves 9 are centrally symmetrically arranged about the horizontal center plane of the rubber bearing; by centrally symmetrically arranging the multiple circles of deformation grooves 9, the deformation can be made more uniform, and the local strain can be reduced, thereby delaying the occurrence of cracks. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradients, and reduce thermal stress. The mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, and reduce performance differences in different directions, thereby improving stability and durability.

[0054] The manufacturing process of this rubber bearing is: S01: placing the preheated metal main and auxiliary inner plates 7 (70°C-80°C) in the mold; S02: After closing the mold, inject a certain amount of natural rubber material and then lock the mold; S03: Vulcanize at set temperature for set time; S04: Open the mold, take out the parts, and remove the glue edge; S06: Pre-press 4mm~6mm, insert the center bolt 5 coated with grease 8; S07: After the nut 6 and the center bolt 5 are tightened, they are locked by circumferential ring welding.

[0055] From the above specific implementations, it can be seen that the present invention has the following beneficial effects: 1. By relatively arranging the reinforcing groove 302 and the reinforcing rib 301 on the upper and lower sides of the main inner plate 3, it is possible to improve the transverse shear stiffness and bending stiffness, reduce the instantaneous large deformation of the rubber layer under complex working conditions, and improve the fatigue life of the laminated rubber bearing while ensuring that the vertical stiffness remains unchanged. At the same time, because the design of the reinforcing groove 302 and the reinforcing rib 301 enhances the shear stiffness and bending stiffness, the main inner plate 3 can be designed to be thinner, thereby realizing the lightweight of the rubber bearing; 2. The reinforcing groove 302 and the reinforcing rib 301 are manufactured by the ring punching process, which ensures the integrity of the material and realizes the hardening of the material, avoids stress concentration, and improves the strength of the main inner plate 3; 3. By adopting an isosceles trapezoidal cross-sectional structure, the shear stiffness and bending stiffness of the main inner plate 3 are further enhanced; 4. By providing a bowl-shaped mounting hole and a matching head and nut 6, when the rubber bearing is torsionally deformed, the top plate 1 and the bottom plate 2 can rotate relative to the central bolt 5 and the nut 6, thereby reducing the resistance to torsion deformation of the bearing and better exerting the deformation energy absorption and shock reduction effect of the bearing; 5. The friction between the center bolt 5 and the top plate 1 and the bottom plate 2 is effectively reduced by providing the lubricating grease 8, and at the same time, the center bolt 5 is prevented from biting with the top plate 1 and the bottom plate 2 under instantaneous large load; 6. By thinning the material of the extended portion of the bottom plate 2, the bottom plate 2 can be elastically deformed under the action of external force to absorb energy, thereby preventing the energy from being transmitted to the center bolt 5 without attenuation, causing the center bolt 5 to deform and break; 7. 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 can be deformed to absorb energy, further reducing the energy transmitted to the center bolt 5 and extending the service life of the center bolt 5. 8. By setting the deformation groove 9, the deformation direction of the shock-absorbing rubber can be guided to make it more uniform, avoid local excessive deformation, and thus extend 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. The elongation of the rubber material at the edge of the pressure extrusion process and the contact position between the main and auxiliary inner plates 7 is low, and the probability of cracking of the edge rubber layer is low, which is not easy to induce the problem of edge cracking of the shock-absorbing rubber 4; 9. By setting the cross section of the deformation groove 9 to be C-shaped, less heat is generated. At the same time, the protrusion is close to the main inner plate to enhance the interface adhesion and reduce the peeling force; 10. By arranging the multiple circles of deformation grooves 9 symmetrically, the deformation can be made more uniform, the local strain can be reduced, and the generation of cracks can be delayed. At the same time, the symmetrical structure may improve heat dissipation, reduce temperature gradients, and reduce thermal stress. The mirror symmetry can make the stiffness distribution of the rubber bearing more uniform, improve isotropy, and reduce performance differences in different directions, thereby improving stability and durability.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to 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 shock absorbing rubber (4) is arranged between the top plate (1) and the bottom plate (2), and a plurality of main inner plates (3) are arranged inside the shock absorbing rubber (4), characterized in that: A center hole is provided at the center of the main inner plate (3), and an annular reinforcement groove (302) and an annular reinforcement rib (301) are provided on the main inner plate (3). The reinforcement rib (301) and the reinforcement groove (302) are respectively arranged at the two end surfaces of the main inner plate (3) and are arranged opposite to each other. The reinforcement groove (302) and the reinforcement rib (301) are both arranged coaxially with the center hole, and the opening directions of the reinforcement grooves (302) of two adjacent circles are opposite.

2. The rubber bearing according to claim 1, characterized in that: The reinforcement groove (302) is manufactured by a ring punching process, and the reinforcement rib (301) is produced by ring punching of the reinforcement groove (302).

3. The rubber bearing according to claim 2, characterized in that: The cross-section of the reinforcement groove (302) and the cross-section of the reinforcement rib (301) both present an isosceles trapezoidal structure.

4. The rubber bearing according to any one of claims 1 to 3, characterized in that: The invention also comprises a central bolt (5), wherein the central bolt (5) passes through the top plate (1), the shock-absorbing rubber (4) and the bottom plate (2) in sequence, and a nut (6) is arranged at the end of the central bolt (5). The top plate (1) and the bottom plate (2) are both provided with mounting holes, and the central bolt (5) passes through the mounting holes. The mounting holes are bowl-shaped structures, and the heads of the central bolt (5) and the nut (6) are both conical structures adapted to the corresponding mounting holes. The shock-absorbing rubber (4) is provided with a through hole, and the central bolt (5) passes through the through hole.

5. The rubber bearing according to claim 4, characterized in that: Lubricating grease (8) is provided between the central bolt (5) and the through hole.

6. The rubber bearing according to claim 4, characterized in that: The portion of the bottom plate (2) located at the edge of the mounting hole extends towards the head of the central bolt (5) and has a thickness that decreases along the extending direction.

7. The rubber bearing according to claim 6, characterized in that: It also includes two auxiliary inner plates (7), the two auxiliary inner plates (7) are respectively close to the top plate (1) and the bottom plate (2), the number of circles of the reinforcement groove (302) of the auxiliary inner plate (7) is less than that of the main inner plate (3), the diameter of the central hole of the auxiliary inner plate (7) is D1, and the diameter of the central hole of the main inner plate (3) close to the auxiliary inner plate (7) is D2, and D2<D1.

8. The rubber bearing according to claim 7, characterized in 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 a plurality of circles of deformation grooves (9), and 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).

9. The rubber bearing according to claim 8, characterized in that: The cross section of the deformation groove (9) is a C-shaped structure, and the protruding portion of the deformation groove (9) is close to the end surface of the main inner plate (3).

10. The rubber bearing according to claim 9, characterized in that: The multiple circles of deformation grooves (9) are arranged in a mirror image with respect to the horizontal center plane of the rubber support.

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