Rubber ring

Abstract

The invention belongs to the technical field of elastic couplings, and particularly relates to a rubber ring. The rubber ring comprises a plurality of rigid connecting parts and elastic buffering parts which are alternately arranged in the circumferential direction, each elastic buffering part is of a fan-shaped structure and comprises two cambered surfaces and two side planes, the part close to the axis of the rubber ring is a first cambered surface, and the part away from the axis of the rubber ring is a second cambered surface; the elastic buffer part is connected with the rigid connecting part adjacent to the first side through a first side plane, the elastic buffer part is connected with the rigid connecting part adjacent to the second side through a second side plane, and the extension surfaces of the first side plane and the second side plane in the radial direction of the rubber ring intersect at the axis of the rubber ring on the radial section containing the axis of the rubber ring. The elastic buffering part is designed into a radial equal-ratio thickening structure, the optimized pre-compression amount is matched, the asymmetric contour and the multiple layers of partition plates are adopted for reinforcement, and the fatigue life of the rubber ring under the high-frequency shearing and axial stretching combined load is remarkably prolonged.

Description

Technical Field

[0001] This application belongs to the field of flexible coupling technology, and particularly relates to a rubber ring. Background Technology

[0002] In the transmission systems of rail vehicles, especially modern trams, flexible couplings are commonly used to connect the gearbox and axle to transmit torque and compensate for various displacements and vibrations. The core elastic element of this type of coupling is usually a rubber ring. Under special operating conditions, such as considering the creep of the primary rubber springs and the height difference between empty and loaded vehicles, the OEM will intentionally set a certain height difference during installation. Based on this height difference, the rubber ring will bear the deflection force of the connecting shaft components, thus generating deflection displacement and undergoing continuous high-frequency shear deformation during high-speed rotation. Under the combined alternating loads of torque load, axial displacement, and high-frequency shear, traditional rubber rings are prone to fatigue cracks at stress concentration points (such as the rubber-metal bonding area and abrupt contour changes), and may even lead to complete separation of the rubber from the metal, seriously affecting driving safety and component life.

[0003] Existing rubber ring designs often focus on macroscopic torque transmission and displacement compensation functions, while paying insufficient attention to their microscopic mechanical behavior and fatigue failure mechanisms under specific harsh working conditions (high-frequency shear and tensile stress). The lack of targeted structural optimization design results in products whose durability cannot meet increasingly stringent usage requirements.

[0004] Therefore, there is an urgent need for a rubber ring that can overcome or reduce the effects of fatigue failure and meet the application requirements of harsh working conditions. Summary of the Invention

[0005] The present invention solves at least to some extent the above-mentioned technical problems and provides a rubber ring that significantly improves the fatigue life of the rubber ring under high-frequency shear and axial tensile combined loads by designing the elastic buffer part as a radially proportionally thickened configuration, matching and optimizing the pre-compression amount, and using an asymmetric profile and multi-layer septum reinforcement.

[0006] Embodiments of this disclosure provide a rubber ring applied to a gearbox coupling for transmitting torque and compensating for displacement. The ring includes multiple rigid connecting portions and elastic buffer portions arranged alternately along the circumference. Each elastic buffer portion comprises an elastic block of rubber material and has a fan-shaped structure. The two curved surfaces are as follows: the one closer to the axis of the rubber ring is the first curved surface, and the one farther away from the axis of the rubber ring is the second curved surface. Two side planes, the elastic buffer portion is connected to the rigid connection portion adjacent to the first side through the first side plane, the elastic buffer portion is connected to the rigid connection portion adjacent to the second side through the second side plane, and in the radial section containing the axis of the rubber ring, the extension surfaces of the first side plane and the second side plane in the radial direction of the rubber ring intersect the axis of the rubber ring.

[0007] The technical solution provided in this application has at least the following beneficial effects: by defining a proportionally thickened configuration for the elastic buffer part, it ensures that the force flow can be uniformly transmitted radially when transmitting torque or bearing radial shear, which significantly optimizes the stress distribution inside the rubber and avoids local stress concentration.

[0008] In other embodiments of this application, the rubber ring is provided with a minimum pre-compression. , Where R2 is the outer radius of the rubber ring after installation, M is the maximum torque that the rubber ring needs to withstand, T is the torsional stiffness of the rubber ring, a is the creep of the rubber material, and the pre-compression amount refers to the circumferential compression of the elastic buffer part after the rubber ring is installed relative to before installation.

[0009] The technical solution provided in this application has at least the following beneficial effects: by setting the minimum pre-compression of the rubber ring by the working torque, component stiffness and material creep, it is ensured that the designed pre-compression is sufficient to offset the tensile deformation of the rubber ring under the working torque, thereby ensuring that the rubber is always under compression stress during operation, and fundamentally avoiding the problem of cracks being aggravated by tension.

[0010] In other embodiments of this application, the actual pre-compression S after the rubber ring is installed satisfies: ; Wherein, the actual pre-compression amount R1 is the outer radius of the rubber ring before installation, and θ is the angle between the first side plane and the second side plane after installation.

[0011] The technical solution provided in this application brings at least the following beneficial effects: In other embodiments of this application, in the radial direction of the rubber ring, the outer contour surface of the elastic buffer portion is an inwardly concave arc-shaped recessed surface, and the axis of symmetry of the arc-shaped recessed surface is closer to the axis of the rubber ring than the radial center position of the elastic buffer portion.

[0012] The technical solution provided in this application has at least the following beneficial effects: by shifting the waist center inward, it effectively improves the outward bulging shape of the rubber side when it is subjected to pressure and shear deformation, making the bulging deformation along the length direction more uniform and consistent, and further alleviating the local stress concentration and frictional heat generation caused by uneven bulging.

[0013] In other embodiments of this application, at least two metal partitions are provided inside the elastic buffer portion, and the metal partitions are spaced apart from the rubber layer made of rubber material.

[0014] The technical solution provided in this application brings at least the following beneficial effects: by embedding multiple layers of metal partitions inside the rubber, the overall bending and torsional stiffness of the elastic buffer part is enhanced, making it deform less when subjected to torque, thereby further reducing the tensile stress level borne by the rubber under working conditions.

[0015] In other embodiments of this application, in the circumferential direction of the rubber ring, the outer contour surface of the rubber layer of the elastic buffer portion is a composite surface. The composite surface is recessed inward along the axis of the rubber ring and includes a first inclined surface connected to the first side plane, a second inclined surface connected to the adjacent metal partition, and an arc surface located between the first inclined surface and the second inclined surface and connected to the first inclined surface and the second inclined surface.

[0016] The technical solution provided in this application brings at least the following beneficial effects: by designing the width profile of the elastic buffer part as a composite surface that transitions from a slope to a circular arc, the bulging point of the rubber can be far away from the bonding interface between the rigid connection part and the rubber and the edge of the internal partition when the rubber is compressed and deformed, thereby avoiding the initial micro-cracks generated by direct friction between the bulging part and the interface of the rigid connection part, and improving the long-term fatigue life.

[0017] In other embodiments of this application, the first angle a1 between the first inclined surface and the first side plane is greater than the second angle a2 between the second inclined surface and the adjacent metal partition.

[0018] The technical solution provided in this application brings at least the following beneficial effects: by limiting the asymmetry of the composite surface, the degree of rubber deformation near the rigid connection is effectively restricted, ensuring that the bulging point is kept away from the dangerous interface in different areas of the rubber, making the surface design more adaptable.

[0019] In other embodiments of this application, the rigid connection portion is a wedge-shaped metal fixing element, and the elastic buffer portion is fixed between adjacent wedge-shaped metal fixing elements by vulcanization to form an integral ring structure.

[0020] The technical solution provided in this application brings at least the following benefits: by designing the rubber ring as an integral vulcanized structure, the reliability of the overall connection of the rubber ring and the balance of the preload are enhanced, and the adaptability to standard working conditions and space-unrestricted occasions is improved.

[0021] In other embodiments of this application, a metal mounting base is provided on each side of the rigid connection portion; the elastic buffer portion includes a metal base plate provided on both sides, a rubber body vulcanized and fixed on the metal base plate, and at least one metal partition plate provided inside the rubber body; the elastic buffer portion is detachably connected to the metal mounting base of the adjacent rigid connection portion through the metal base plate.

[0022] The technical solution provided in this application brings at least the following benefits: by designing the rubber ring as a split modular structure, the maintenance cost and time of the equipment are greatly reduced.

[0023] In other embodiments of this application, a mounting reference surface is provided on the metal mounting base, and a mounting mating surface corresponding to the mounting reference surface is provided on the metal base plate. When the rubber ring is in a free state before installation, the normal direction of the mounting mating surface and the normal direction of the mounting reference surface have a preset deflection angle β, so that the mounting reference surface and the mounting mating surface coincide after installation.

[0024] The technical solution provided in this application has at least the following beneficial effects: by presetting the deflection angle β, the mating surface is forced to fit against the reference surface by tightening the bolts during installation, ensuring that the elastic buffer part is pre-compressed proportionally, thereby ensuring that the rubber is uniformly stressed.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1) By making the radial extensions of the two main force-bearing side planes of the elastic buffer intersect the axis of the rubber ring, a core structure with radially proportional thickening is formed. This is consistent with the deformation ratio at each position when the rubber ring bears torque, thus achieving uniform load transfer and optimized stress distribution along the radial direction, and greatly reducing the risk of stress concentration.

[0026] 2) By designing the pre-compression amount, the rubber ring is kept under compression stress under working torque, effectively overcoming the problem of rubber cracking due to material creep and working tension.

[0027] 3) By using the radial asymmetric concave surface design and the circumferential composite surface design, the deformation shape and contact stress are controlled, thereby improving the fatigue life of the rubber ring under high-frequency shear conditions.

[0028] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0030] Figure 1 This is a schematic diagram of the overall structure of the rubber ring according to an embodiment of this application; Figure 2 This is a schematic diagram of the appearance of the rubber ring in an embodiment of this application; Figure 3 This is a schematic cross-sectional view of the elastic buffer portion of the rubber ring in an embodiment of this application. Figure 1 ; Figure 4 This is a schematic diagram of the appearance of the elastic buffer part of the rubber ring in an embodiment of this application. Figure 1 ; Figure 5 This is a schematic cross-sectional view of the rubber ring in an embodiment of this application. Figure 2 ; Figure 6 This is a schematic diagram comparing the rubber ring before and after installation in an embodiment of this application. Figure 1 ; Figure 7 This is a schematic diagram of the appearance of the elastic buffer part of the rubber ring in an embodiment of this application. Figure 2 ; Figure 8 This is a schematic diagram of the appearance of the elastic buffer part of the rubber ring in an embodiment of this application. Figure 3 ; Figure 9 This is a schematic diagram of the appearance of the rigid connection part of the modular rubber ring structure in an embodiment of this application; Figure 10 This is a schematic diagram of the appearance of the modular rubber ring structure according to an embodiment of this application; Figure 11 This is a schematic diagram comparing the modular rubber ring structure of this application before and after installation. Figure 2 ; In the above figures, 1. Rigid connection part; 2. Elastic buffer part; 201. First side plane; 202. Second side plane; 203. Arc-shaped concave surface; 204. First arc surface; 205. Second arc surface; 206. Metal partition; 207. Rubber layer; 208. Composite surface; 209. First inclined surface; 210. Second inclined surface; 211. Circular arc surface; 212. Metal base plate; 213. Assembly connection structure. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not constitute unnecessary restrictions due to the use of such prefixes. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0033] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0034] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Typical rubber couplings are primarily used to withstand torsional loads and transmit torque, with minimal axial, radial, and torsional loads, which are often avoided during installation. However, in modern low-floor trams, to accommodate the compact space, there is often a pre-defined height difference between the gearbox output shaft and the wheel axle. The rubber rings in these couplings are subjected to continuous high-frequency shear deformation and torsional displacement during vehicle operation. This harsh combined condition of tensile stress from high-frequency shear and torsional displacement exacerbates the shear deformation of the rubber blocks within the rubber rings, leading to cracks that gradually worsen during use. Furthermore, high-frequency shear easily causes high temperatures in the rubber, and since the rubber rings themselves operate in high-temperature environments, this further exacerbates fatigue cracking.

[0037] Existing rubber ring structures suffer from severe rubber cracking during use, with some products even experiencing complete detachment of the metal from the rubber, affecting driving safety. Analysis of the product structure and operating conditions reveals that the cause of these failures is that the product structure and rubber profile were not designed to match the rubber deformation caused by the load conditions of special application scenarios such as modern low-floor trams. Furthermore, the pre-compression amount was not designed to match the load conditions and product stiffness.

[0038] To address the above problems, embodiments of this disclosure provide a rubber ring with improved design of its surface structure and pre-compression, thereby adapting the rubber ring structure to special application scenarios such as modern low-floor trams. The specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0039] Embodiments of this disclosure provide a rubber ring applied to a gearbox coupling for transmitting torque and compensating for displacement, such as... Figure 1As shown, the rubber ring includes a rigid connecting part 1 that provides connection and support, and an elastic buffer part 2 that provides buffering and deformation. Multiple rigid connecting parts 1 and elastic buffer parts 2 are arranged sequentially at intervals along the circumference of the rubber ring to form a complete ring.

[0040] like Figure 2 As shown, each elastic buffer part 2 is a fan-shaped structure, the main body of which is made of rubber material. The fan-shaped structure includes two arc surfaces and two side planes. Among them, the arc surface 204 is closer to the axis of the rubber ring, and the arc surface 205 is farther away from the axis of the rubber ring.

[0041] The two side planes are the main force transmission interfaces of the rubber ring. The elastic buffer part 2 is connected to the rigid connection part 1 adjacent to the first side through the first side plane 201, and the elastic buffer part 2 is connected to the rigid connection part 1 adjacent to the second side through the second side plane 202. In the radial section containing the axis of the rubber ring, the extension surfaces of the first side plane 201 and the second side plane 202 in the radial direction of the rubber ring intersect the axis of the rubber ring.

[0042] The technical solution of this application defines the configuration of the elastic buffer part 2, which is necessarily a wedge-shaped block in the radial direction, and its thickness increases proportionally and uniformly from the first arc surface 204 to the second arc surface 205. When torque is transmitted to the elastic buffer part 2 through the rigid connection part 1, the force is input through these two side planes. Since the extension lines of the side planes intersect at the axis, the force flow can be uniformly distributed radially across the entire cross-section of the elastic buffer part 2, forming an ideal force flow transmission path. This avoids the force flow from concentrating in certain areas, resulting in excessive local stress, and improves the rubber ring's ability to withstand high-frequency shear loads.

[0043] In a specific illustrative embodiment, such as Figure 6 As shown, to prevent cracks in the rubber due to tension, the rubber ring is provided with a pre-compression amount. The pre-compression amount refers to the circumferential compression of the elastic buffer part 2 after the rubber ring is installed and tightened, relative to its completely free and unrestrained state before installation. The rubber ring of this application is provided with a minimum pre-compression amount. Minimum precompression The design takes into account the maximum torque M that the rubber ring needs to withstand during operation, the torsional stiffness T of the rubber ring itself as a component, and the creep α of the rubber material. Where R2 is the outer radius of the rubber ring after installation, the torsional stiffness T reflects the rubber ring's ability to resist torsional deformation, and the creep a is the amount of permanent deformation of the rubber material after long-term pressure.

[0044] Specifically, the ratio of the maximum torque M that the rubber ring needs to withstand during operation to the torsional stiffness T of the rubber ring itself as a component. , where is the angle of torsional deformation of the rubber ring under maximum working torque. This is the amount of displacement in the tangential direction of the outer edge of the rubber ring due to this torsional deformation. To ensure that no part of the elastic block of the rubber ring is pulled back to its original length or enters a stretched state, even when the rubber ring is subjected to maximum working torque, the pre-compression of the rubber ring must be greater than that caused by… The calculated displacement. The additional creep variable 'a' is compensation for the long-term relaxation of the rubber material.

[0045] The technical solution of this application is... The defined pre-compression amount defines a safety threshold for the rubber ring, ensuring that the elastic block of the rubber ring is always in a beneficial compressive stress state throughout its working life. This is the core prerequisite for preventing the elastic block from cracking due to tension.

[0046] When designing and manufacturing rubber ring products, due to production and assembly process issues, there is a difference between the actual pre-compression S after installation and the ideal pre-compression target. To control this difference and ensure that the pre-compression after installation reaches the target pre-compression, i.e., to ensure the actual pre-compression of the rubber ring after installation... Therefore, the design, installation process, and installation status of the rubber ring must be matched.

[0047] In a specific illustrative embodiment, to ensure that the actual pre-compression S after the rubber ring is installed meets the requirements... The rubber ring elastic buffer 2 has a specific wedge angle θ, that is, the included angle between the first side plane 201 and the second side plane 202 is designed to be a specific angle θ. This angle, along with the initial dimension R1 of the rubber ring blank (i.e., the outer radius of the rubber ring before installation), determines the actual pre-compression S of the rubber ring after installation. And the actual pre-compression amount S satisfies This allows for precise control of the pre-compression S generated after installation during the rubber ring design process.

[0048] The technical solution of this application quantifies the actual pre-compression amount S after the rubber ring is installed, so that the abstract goal of ensuring that the rubber is not stretched is transformed into a specific production requirement that can be strictly controlled by engineering drawings and process parameters, thus ensuring the reliability and repeatability of the design.

[0049] In a specific illustrative embodiment, such as Figure 3 , Figure 4 As shown, in the radial direction of the rubber ring, the outer contour surface of the elastic buffer part 2 is not simply flat or convex. Instead, the outer contour surface of the elastic buffer part 2 is an inwardly concave arc-shaped recessed surface 203. The axis of symmetry of the arc-shaped recessed surface 203 is closer to the axis of the rubber ring than the center position of the elastic buffer part 2 in the radial direction.

[0050] Specific examples Figure 3 As shown, in the axial section of the elastic block of the elastic buffer part 2, its outer contour surface is designed as an arc-shaped concave surface 203. The radial distance between the first arc surface 204 and the second arc surface 205 is (W1+W2). The boundary between W1 and W2 is the center point of the arc-shaped concave surface 203, where W1 is greater than W2. That is, the outer contour surface of the elastic buffer part 2 is an asymmetrical concave waist-tight design.

[0051] Under pre-compression and shear loads, the elastic block of the rubber ring is prone to outward bulging deformation on its sides. Traditional symmetrical or straight contours tend to lead to uneven bulging deformation, often forming abnormal protrusions in the middle, which become new stress concentration sources. The technical solution of this application actively manages the deformation of the rubber ring by designing the outer contour surface of the elastic buffer part 2 as an asymmetrical concave waist-shaped surface. By shifting the center of the waist inward, the amount of bulging at each point along the length of the elastic buffer part 2 can be guided and adjusted during deformation, making it more uniform. This smooths the strain field distribution inside the elastic block, further eliminating local high-strain areas caused by uneven deformation, and also helps to reduce internal frictional heat generation.

[0052] To significantly improve the overall stiffness and load-bearing capacity of the rubber ring, a reinforcing structure needs to be introduced inside the elastic buffer section.

[0053] In a specific illustrative embodiment, such as Figure 2 As shown, within the elastic buffer section 2 made of rubber material, at least two layers of metal partitions 206 are embedded at intervals along a direction parallel to its first side plane 201. These metal partitions 206 are typically made of steel plates and are firmly bonded to the surrounding rubber material. The metal partitions 206 separate the originally continuous rubber body, thereby forming a multi-layered composite structure in which the metal partitions 206 and rubber layers 207 are arranged alternately.

[0054] The technical solution of this application significantly enhances the bending and torsional stiffness of the elastic buffer section 2 by embedding a metal partition 206. Rubber material itself is relatively soft, and its stiffness is limited when used alone. Adding the rigid metal partition 206 is equivalent to providing internal skeletal support for the soft elastic block. Under the same working torque, the overall deformation of this composite structure is smaller. Smaller deformation means that the dynamic stress amplitude generated inside the elastic block due to deformation is also reduced, which is crucial for improving fatigue life. The multi-layered structure achieves a significant improvement in stiffness without excessively increasing weight or cost.

[0055] Based on the multi-layer composite structure with the addition of metal partition 206, the present invention further optimizes the outer contour surface of the elastic buffer part 2 in the circumferential direction of the rubber ring.

[0056] In a specific illustrative embodiment, such as Figure 5 As shown, in the circumferential direction of the rubber ring, the outer contour surface of the rubber layer 207 of the elastic buffer part 2 is a composite surface 208. The composite surface 208 is recessed inward along the axis of the rubber ring, as shown in the figure. Figure 7 As shown, the composite surface 208 includes a first inclined surface 209 connected to the first side plane 201, a second inclined surface 210 connected to the adjacent metal partition 206, and an arc surface 211 located between the first inclined surface 209 and the second inclined surface 210 and connected to the first inclined surface 209 and the second inclined surface 210.

[0057] Due to the working environment and inherent characteristics of the rubber ring, the elastic block of the elastic buffer part 2 has two key interfaces that are prone to failure: one is the first side plane 201 where the rubber layer 207 is bonded to the rigid connection part 1, and the other is the edge where the rubber layer 207 is bonded to the internal metal partition 206.

[0058] The technical solution of this application, by designing the outer contour surface of the rubber layer 207 as a combination of "first inclined surface 209 - arc surface 211 - second inclined surface 210", can effectively shift the point of maximum bulging during deformation of the rubber layer 207 to the internal region of the rubber layer, keeping it away from the two easily failed interfaces. Since cracks often originate from stress concentration or fretting wear at these easily failed interfaces, by controlling the bulging shape of the rubber layer 207 in the circumferential direction under compression and shear, the bulging point is kept away from the interface, which is equivalent to setting up an isolation zone for crack initiation, significantly improving durability.

[0059] In a specific illustrative embodiment, based on the deformation gradient of the rubber layer 207 under actual working conditions, the composite surface 208 is further optimized in design, specifically, as follows: Figure 8 As shown, the first angle a1 between the first inclined plane 209 and the first side plane 201 is greater than the second angle a2 between the second inclined plane 210 and the adjacent metal partition 206.

[0060] The rubber material near the external rigid connection 1, specifically the rubber material at the first side plane 201, experiences greater relative deformation and shear displacement due to directly bearing the load input. Therefore, a larger tilt angle α1 is needed to provide sufficient deformation space for this portion of the rubber material, ensuring that even under large deformation, its bulging point can be effectively controlled within a safe area away from the dangerous interface. Conversely, the rubber material near the internal metal partition 206 exhibits smaller relative deformation, and a smaller tilt angle α2 can achieve the same protective effect while avoiding unnecessary material accumulation or deterioration of stress distribution due to an excessively large angle.

[0061] The technical solution of this application effectively limits the deformation of the rubber material near the rigid connection part 1 by limiting the asymmetry of the composite surface 208, ensuring that the bulging point can be kept away from the dangerous interface in different areas of the rubber layer 207, making the surface design more adaptable.

[0062] In a specific illustrative embodiment, the rubber ring is an integral design, specifically, as shown below. Figure 9 As shown, the rigid connection part 1 is a wedge-shaped metal fixing element, and the elastic buffer part 2 is directly bonded and cured to the two adjacent wedge-shaped metal fixing elements through a high-temperature and high-pressure vulcanization process to form a complete and indivisible ring component. Each wedge-shaped metal fixing element is usually machined with radial through holes or threaded holes for mounting the entire rubber ring assembly to the drive plate and driven plate of the transmission system by bolts.

[0063] This application's technical solution designs the rubber ring as an integrated structure. Because the rubber and metal are vulcanized together in a single process during manufacturing, the interface bonding strength is high, eliminating the risk of loosening that may arise from bolt connections. The preload of the entire rubber ring is easily and evenly distributed during installation. This structure is simple, robust, and durable, making it ideal for standard industrial applications with ample installation space, extremely stringent reliability requirements, and where frequent disassembly and maintenance are not necessary.

[0064] In a specific illustrative embodiment, the rubber ring has a modular structure, specifically, as shown below. Figure 10 As shown, a metal mounting base is provided on each side of the rigid connection part 1. The elastic buffer part 2 includes a metal base plate 212 on both sides, a rubber body vulcanized and fixed on the metal base plate 212, and at least one metal partition 206 disposed inside the rubber body. An assembly connection structure 213 is provided on the side of the metal base plate 212 that connects to the rigid connection part 1. The elastic buffer part 2 is detachably connected to the metal mounting base of the adjacent rigid connection part 1 through the metal base plate 212. Multiple elastic buffer parts 2 and rigid connection parts 1 are spliced ​​together along the axial direction to form a complete rubber ring functional body.

[0065] This application's technical solution improves the maintainability of the rubber ring by designing it as a modular structure. If any one of the elastic buffers 2 is damaged during operation, it can be individually disassembled and replaced without scrapping the entire expensive coupling. This significantly reduces long-term maintenance costs and downtime. Simultaneously, both the rigid connection part 1 and the elastic buffer part 2 can be standardized, high-quality manufactured and pre-tested in the factory, ensuring consistent performance of each module and improving the overall product system's reliability and spare parts commonality.

[0066] In a specific illustrative embodiment, for a modular rubber ring, to achieve optimal initial stress distribution, a mounting reference surface is provided on the metal mounting base, and a mounting mating surface corresponding to the mounting reference surface is provided on the metal base plate 212. Furthermore, to ensure that the mounting reference surface and the mounting mating surface coincide after installation, when the rubber ring is in its free state before installation, the normal direction of the mounting mating surface is not parallel to the normal direction of the mounting reference surface, but rather has a pre-designed deflection angle β. By tightening the connecting bolts, the two surfaces with the deflection angle β are forcibly pulled to complete contact. This forced contact process will generate a specific compression effect on the intermediate rubber body. Figure 11 As shown, F1 axis and F2 axis are the center lines corresponding to the two rigid connecting parts 1 before installation, that is, the normal direction of the mounting mating surface on the metal base plate 212 before installation; L1 axis and L2 axis are the center lines corresponding to the two rigid connecting parts 1 after installation, that is, the normal direction of the mounting reference surface on the metal mounting base before installation.

[0067] The technical solution of this application can automatically guide the rubber ring so that, after installation, the extended surfaces of the first side plane 201 and the second side plane 202 in the radial direction of the rubber ring intersect the axis of the rubber ring.

[0068] Meanwhile, ordinary parallel-plane bonding compression easily leads to uneven compressive strain between the inner and outer rings of the rubber layer 207. However, by using an inclined plane bonding process with a deflection angle β, the rubber layer 207 can be driven to produce a coordinated deformation with a basically consistent compressive strain ratio at each point along the entire radial direction from the inner to the outer ring. This proportional compression can establish an extremely uniform initial pre-compression stress field within the rubber layer 207. Uniform stress distribution means there are no obvious stress peaks, thus delaying the initiation of fatigue cracks to the greatest extent possible from the source.

[0069] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A rubber ring, characterized in that, The rubber ring is applied to a gear box coupling, used for transmitting torque and compensating displacement, comprising a plurality of rigid connecting parts (1) and elastic buffering parts (2) arranged alternately in the circumferential direction, the elastic buffering part (2) comprising an elastic block of rubber material, the elastic buffering part (2) being a fan-shaped structure, comprising: two arc surfaces, the first arc surface (204) being close to the axis of the rubber ring, and the second arc surface (205) being away from the axis of the rubber ring; two side planes, the elastic buffering part (2) being connected with the rigid connecting part (1) adjacent to the first side through the first side plane (201), and the elastic buffering part (2) being connected with the rigid connecting part (1) adjacent to the second side through the second side plane (202), in the radial section containing the axis of the rubber ring, the extension planes of the first side plane (201) and the second side plane (202) in the radial direction of the rubber ring intersect at the axis of the rubber ring.

2. The rubber ring of claim 1, wherein The rubber ring is provided with a minimum pre-compression , wherein R2 is the outer ring radius of the rubber ring after installation, M is the maximum torque that the rubber ring needs to withstand, T is the torsional stiffness of the rubber ring, is the creep amount of the rubber material, and the pre-compression refers to the size of the elastic buffer portion (2) that is compressed in the circumferential direction after installation of the rubber ring relative to before installation.

3. The rubber ring of claim 2, wherein The actual pre-compression amount S of the rubber ring after installation satisfies: ≥ ; wherein the actual pre-compression amount R1 is the outer radius of the rubber ring before installation, is the included angle between the first side plane (201) and the second side plane (202) after installation.

4. The rubber ring of claim 1, wherein In the radial direction of the rubber ring, the outer contour surface of the elastic buffering part (2) is an arc-shaped recessed surface (203) concave inward, and the symmetry axis of the arc-shaped recessed surface (203) is closer to the axis of the rubber ring than the center position in the radial direction of the elastic buffering part (2).

5. The rubber ring of claim 1, wherein The elastic buffering part (2) is internally provided with at least two metal partitions (206), and the metal partitions (206) are arranged in the rubber layer (207) composed of rubber material.

6. The rubber ring of claim 5, wherein In the circumferential direction of the rubber ring, the outer contour surface of the rubber layer (207) of the elastic buffering part (2) is a composite profile (208) concave inward along the axis of the rubber ring, comprising a first inclined surface (209) connected with the first side plane (201), a second inclined surface (210) connected with the adjacent metal partition (206), and a circular arc surface (211) located between the first inclined surface (209) and the second inclined surface (210) and connected with the first inclined surface (209) and the second inclined surface (210).

7. The rubber ring of claim 6, wherein The first included angle a1 between the first inclined surface (209) and the first side plane (201) is greater than the second included angle a2 between the second inclined surface (210) and the adjacent metal partition (206).

8. The rubber ring of claim 1, wherein The rigid connecting part (1) is a wedge-shaped metal fixing element, and the elastic buffering part (2) is vulcanized and fixed between the adjacent wedge-shaped metal fixing elements to form an integral ring structure.

9. The rubber ring of claim 1, wherein Each of the two sides of the rigid connecting part (1) is provided with a metal mounting seat; the elastic buffering part (2) comprises a metal bottom plate (212) arranged on the two sides, a rubber body vulcanized and fixed on the metal bottom plate (212), and at least one metal partition (206) arranged in the rubber body; and the elastic buffering part (2) is detachably connected with the metal mounting seat of the adjacent rigid connecting part (1) through the metal bottom plate (212).

10. The rubber ring of claim 9, wherein The metal mounting base is provided with a mounting reference surface, the metal bottom plate (212) is provided with a mounting matching surface corresponding to the mounting reference surface, and when the rubber ring is in a free state before installation, a normal direction of the mounting matching surface and a normal direction of the mounting reference surface have a preset deflection angle β, so that the mounting reference surface and the mounting matching surface coincide after installation.

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