Replaceable belleville spring connecting device with self-resetting energy dissipation function

Abstract

The utility model relates to the technical field of energy dissipation and shock absorption of civil engineering structures, in particular to a replaceable belleville spring connecting device with a self-resetting energy dissipation function, which comprises a plurality of complex belleville spring connecting devices used in a frame swing wall structure, the device comprises a plurality of belleville springs, and gaskets are arranged among the belleville springs; second outer baffles are installed on the left side and the right side of the device, the first baffles and the second baffles on the upper side and the lower side are connected through high-strength bolts, a thrust bottom plate and a hexagonal locking nut are arranged on the right sides of the second baffles, and a single-lug plate is arranged on the left sides of the second baffles. The connecting device has the advantages that the resetting and energy consumption principles of the connecting device are basically the same as those of a common steel strand and a damper, the mounting mode is simpler, the manufacturing cost is lower, and the universality is better; and on the other hand, the connecting device has better replaceability, the damaged belleville spring, the damaged gasket and the damaged rubber pad are detached and replaced, the production cost is reduced, earthquake energy can be dissipated, and resetting of the structure after an earthquake is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy dissipation and shock absorption of civil engineering structures, in particular to a replaceable disc spring connection device with a self-resetting energy dissipation function. Background Art

[0002] A restorable functional structure refers to a structure that can be restored to its original function after an earthquake without repair or with only a little repair. From the perspective of specific structural forms, it can be divided into a structure with replaceable components, a self-resetting structure, and a swinging structure. Among them, the self-resetting structure system consists of a reset element and an energy-absorbing element. During an earthquake, the energy-absorbing element dissipates the seismic energy, and after an earthquake, the reset element realizes the structural reset performance. The self-resetting structure has the advantages of small residual deformation and rapid recovery after an earthquake, so it has attracted extensive attention from researchers at home and abroad. The swinging structure is a structural form that realizes the restorable function of the structure. On the basis of the swinging structure, the self-resetting structure system adds additional devices (such as prestressed tendons, disc springs, etc.) that can restore the structure or component to its initial position, thereby reducing the residual deformation of the structure or component after an earthquake. Among them, the swinging wall is a wall that relaxes the constraints at the interface with the foundation to realize its own swinging. It is an important form of realization of the restorable functional structure, which originated from the research on post-tensioned unbonded prestressed precast concrete walls. According to the constraints on the rotation of the wall in the plane, the swing wall can be divided into two forms: controlled swing wall and free swing wall. The former effectively constrains the rotation of the swing wall in the plane, and usually applies prestressed tendons through the swing wall and the foundation to limit the swing amplitude of the wall. The latter cancels the rotation constraint of the wall in the plane, and its connection with the foundation can be regarded as an ideal hinge. Although the wall itself can rotate freely, it will also be restricted by the connected components when combined with other forms of components. The self-resetting frame-swing wall structure reduces the seismic effect of the structure through its own swing and the energy dissipation of the additional damper, realizes the self-resetting of the structure, can significantly reduce the overall damage and residual deformation of the structure, and realize the expected deformation mode and failure mechanism of the structure.

[0003] The rocking wall in the frame-rocking wall structure is an integral key component that controls the deformation mode of the structure and should maintain elasticity under earthquake action. However, the bearing capacity of the rocking wall cannot be infinite. Once the internal force demand of the rocking wall exceeds its bearing capacity, the rocking wall will enter elastic-plastic state, the stiffness will decrease, and the ability to control the deformation mode of the structure will also decrease. Therefore, the connection structure between the rocking wall and the frame is the key to realizing the system. Regarding the connection between the wall and the foundation, researchers have proposed different connection forms, which can be roughly divided into the following types: bottom hinge support type, wall corner replacement type, and bottom slit type. Compared with other connection designs, the bottom hinge support type is currently a commonly used support form to achieve rocking of the rocking wall, and has achieved good results. The connection form between the rocking wall and the frame structure is also a problem that many researchers are constantly exploring and improving. Currently, the commonly used connection methods include prestressed tendon connection, steel damper connection, and diagonal brace connection. Different connection methods can achieve different shock absorption effects. For connections with more prestressed tendons, the rocking wall can have better self-reset ability and less residual deformation after earthquake. However, when the displacement of the rocking wall is too large, it will lead to insufficient self-reset ability, and it is easy to collide with the foundation during the rocking process, causing damage to the wall. In addition, the prestressed tendons need to pass through the foundation and the wall, and the prestressed construction technology is complex. Among them, although the steel damper connection and the diagonal brace connection can effectively disperse the seismic energy, there are also some shortcomings. For example, the steel damper is usually a shear damper. Due to its short length, the distance between the rocking wall and the frame column is relatively strict, and it is only suitable for structures with a close distance between the two. When using diagonal brace connection, its deformation and instability should be considered.

[0004] In summary, the elastic restoring force of the self-resetting structure is mainly provided by prestressed steel strands or prestressed tendons, but the installation method of the self-resetting nodes of prestressed steel strands is relatively difficult; under the long-term action of loads, the steel strands will relax and the prestress will decrease, which will affect the structural reset ability. Therefore, it is urgent to propose a replaceable disc spring connection device with self-resetting energy dissipation function to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a replaceable disc spring connection device with self-resetting energy-consuming function.

[0007] The purpose of the utility model is achieved by the following technical solutions: a replaceable disc spring connection device with self-resetting energy dissipation function, including a plurality of composite disc spring connection devices used in a frame swing wall structure, the composite disc spring connection device including a plurality of disc springs, and gaskets are arranged between the plurality of disc springs;

[0008] A second outer baffle is installed on both sides of the left and right sides of the composite disc spring connecting device, and a first outer baffle is installed on both sides of the upper and lower sides of the second outer baffle. The second outer baffle on the left side of the composite disc spring connecting device is fixed with a first ear plate, and the second outer baffle on the right side of the composite disc spring connecting device is fixed with a thrust base plate, and a plurality of hexagonal locking nuts are arranged on the thrust base plate. A ductile hexagonal socket bolt is penetrated through the center of the second outer baffle, and a sliding sleeve is arranged between the plurality of disc springs and the ductile hexagonal socket bolt, and the ductile hexagonal socket bolt penetrates the composite disc spring connecting device and the thrust base plate.

[0009] Preferably, the frame swing wall structure includes a main frame structure and a swing wall, the main frame structure is multi-layered, the main frame structure is fixedly connected to the foundation, the swing wall is hingedly connected to the foundation, a plurality of composite disc spring connection devices are evenly distributed between the multi-layer main frame structure and the swing wall, and the plurality of composite disc spring connection devices are symmetrically arranged on both sides of the swing wall.

[0010] By adopting the above technical scheme, the connection between the composite disc spring connecting device and the swing wall not only has the effect of self-resetting and energy dissipation, but also has the function of transmitting horizontal force under small earthquakes and absorbing energy under large earthquakes. That is, when the load is small, the disc spring self-resetting and energy dissipation connecting device will not produce relative displacement with the swing wall, that is, there is no relative rotation between the second ear plate and the first ear plate. At this time, the connection between the composite disc spring connecting device and the swing wall is approximately equivalent to a traditional rigid node, which can transmit the axial horizontal force of the main frame structure.

[0011] Preferably, two groups of second ear plates are fixedly provided at positions of the swing wall corresponding to the multiple composite disc spring connecting devices, and the first ear plate is hingedly connected to the second ear plate via a pin.

[0012] By adopting the above technical solution, the second ear plate welded in the thickness direction of the swing wall is connected to the first ear plate through a high-strength pin shaft, so that the swing wall can not only realize left and right swinging in the wall plane, but also limit the rotation of the wall around the height direction of the swing wall. In addition, since the swing wall will produce vertical displacement relative to the main frame structure during the left and right swinging of the swing wall around the hinge support, the pin shaft connection between the second ear plate and the first ear plate can relax the translational freedom of the floor connection device in the wall height direction and the rotational freedom around the wall thickness direction, thereby ensuring that the disc spring self-resetting energy-absorbing connection device does not cause structural or self-damage during the swinging process.

[0013] Preferably, the multi-layer main frame structure is provided with embedded reinforcement plates on both the upper and lower sides of the composite disc spring connection device.

[0014] By adopting the above technical solution, the reinforcing plate is fixed in the steel cage of the frame beam before pouring concrete on the frame beam, and then the concrete is poured. This not only realizes the connection between different material properties, that is, the connection between reinforced concrete and steel, but also provides a welding point for the first outer baffle connection in the disc spring self-resetting energy-absorbing connection device, thereby better fixing the energy-absorbing connection structure.

[0015] Preferably, the second outer baffle plate is connected to the first outer baffle plate by high-strength bolts.

[0016] By adopting the above technical solution, the connection strength between the second outer baffle plate and the first outer baffle plate can be improved.

[0017] Preferably, the composite disc spring connecting device is provided with rubber pads on the inner sides of the two second outer baffles.

[0018] By adopting the above technical solution, it can be used to absorb energy.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The replaceable disc spring connection device with self-resetting energy dissipation function is provided with a composite disc spring connection device. On the one hand, the composite disc spring connection device utilizes the elastic potential energy of the spring and the friction energy dissipation between the discs to make its reset and energy dissipation principle basically the same as that of the ordinary steel strand self-resetting node. The installation method is simpler than that of the ordinary steel strand self-resetting node, the cost is lower, and the design is relatively flexible. By changing the ratio of the disc deformation to the disc thickness, different characteristic curves can be obtained. It has good engineering universality, can effectively reduce the problems of prestress failure and cumbersome construction, and has an economical and efficient effect. On the other hand, it can The damaged disc springs, gaskets and rubber pads in the composite disc spring connection device can be removed and replaced. The entire replaceable process is convenient and quick. It can not only replace the damper with a higher cost, but also has the same self-resetting effect as the prestressed tendons. Especially in the construction of small buildings, the production cost is greatly reduced. It can not only dissipate the seismic energy, but also realize the reset of the structure after the earthquake. It is an economical and practical connection device with a simple structure suitable for engineering applications. The replaceable performance of this device is not only conducive to reducing the post-earthquake repair cost and repair time, but also improves the earthquake resistance and disaster prevention resilience of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the composite disc spring connection device of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the frame-swing wall structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the second ear plate of the utility model;

[0025] Figure 4 It is a cross-sectional view of the disc spring of the utility model.

[0026] In the figure: 1. first ear plate; 2. high-strength bolt; 3. first outer baffle plate; 4. disc spring; 5. gasket; 6. sliding sleeve; 7. rubber pad; 8. second outer baffle plate; 9. thrust base plate; 10. hexagonal locking nut; 11. ductile hexagonal socket bolt; 12. swing wall; 13. second ear plate; 14. embedded reinforcement plate; 15. main frame structure. DETAILED DESCRIPTION

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] Additional aspects and advantages of the present invention will be further described below in conjunction with the accompanying drawings, and some will become apparent from the following description or be learned through practice of the present invention.

[0030] like Figure 1-4 As shown, a replaceable disc spring connection device with self-resetting energy dissipation function includes a plurality of composite disc spring connection devices used in a frame rocking wall structure, and the composite disc spring connection device includes a plurality of disc springs 4, and the parameters of the disc spring 4 include outer diameter D, inner diameter d, free height H0, disc spring 4 thickness t, deformation amount h0 when flattened, and cone angle θ. The most significant advantage of the disc spring 4 is that a composite disc spring 4 can be formed according to design requirements by overlapping and matching the disc springs 4, so as to obtain different stiffness and deformation. When the outer diameter D and inner diameter d of the upper and lower end surfaces of the composite disc spring 4 are subjected to axial load, the cone bottom angle θ of the cross section is reduced, so that the spring produces axial deformation, and the axial dimension is compact and the radial dimension is large, so that the composite disc spring 4 is always in a compressed state during the entire movement, thereby providing it with sufficient elastic restoring force. In addition, the disc group has the advantages of small deformation, high load-bearing capacity, high rigidity, and large disc unit volume deformation capacity. It can use the friction between the layers of disc springs to buffer the impact and play a damping effect of attenuating vibration. Therefore, it has strong buffering and shock absorption capabilities and is suitable for occasions with small axial space requirements to save space. In addition, the disc spring group has good wear resistance and high temperature resistance. Under the dynamic load generated by the earthquake, the disc spring 4 group can maintain good energy dissipation capacity above a certain loading frequency. With the increase of preload, the energy dissipation capacity of the combined disc spring 4 is enhanced, which can effectively reduce the energy of the structure. When the disc spring 4 is subjected to force, the outer diameter will increase and the inner diameter will decrease. This compression phenomenon is called the maximum compression outer diameter and the minimum compression inner diameter. Therefore, when the disc spring 4 is designed and manufactured, the outer diameter and the inner diameter are respectively left with a specified radial expansion amount, that is, when the disc spring 4 is subjected to pressure, radial deformation will occur, the outer diameter increases, and the inner diameter decreases. Therefore, a certain gap is left between the disc spring and the external component to ensure that the combined disc springs can exert their respective performance advantages. In order to ensure that the axial compression deformation of the disc spring is not hindered and to improve the self-resetting ability of the connecting device, a gasket 5 is provided between multiple disc springs 4;

[0031] The left and right sides of the composite disc spring connection device are both installed with second outer baffle plates 8. The composite disc spring connection device is located on the inner sides of the two second outer baffle plates 8 and is provided with rubber pads 7. Extrusion deformation will occur between the disc spring 4 and the rubber pad 7 to absorb part of the seismic energy, and the seismic energy can also be dissipated through the mutual friction between the friction plate and the friction plate, so that the effect of energy dissipation and shock absorption can be achieved. The upper and lower sides of the second outer baffle plate 8 are both installed with first outer baffle plates 3. The second outer baffle plate 8 is connected to the first outer baffle plate 3 by high-strength bolts 2. The second outer baffle plate 8 on the left side of the composite disc spring connection device is fixed with a first ear plate 1, and the second outer baffle plate 8 on the right side of the composite disc spring connection device is fixed with a thrust base plate 9 A plurality of hexagonal locking nuts 10 are provided on the thrust base plate 9, and a sliding sleeve 6 is provided between the plurality of disc springs 4 and the ductile hexagonal socket bolt 11 to reduce the sliding friction of the disc spring during the force-bearing process and ensure that the disc spring can better provide elastic restoring force. A ductile hexagonal socket bolt 11 is penetrated at the center of the second outer baffle plate 8, and the ductile hexagonal socket bolt 11 penetrates the composite disc spring connecting device and the thrust base plate 9. By adjusting the thrust base plate 9 and the hexagonal locking nut 10, the composite disc spring connecting device is always in a compressed state regardless of tension or pressure, thereby meeting the stiffness and displacement requirements required by the disc spring 4 design, and completing the assembly of the composite disc spring connecting device.

[0032] The frame swing wall structure includes a main frame structure 15 and a swing wall 12. The main frame structure 15 is multi-layered. The multi-layer main frame structure 15 is located at the upper and lower sides of the composite disc spring connection device and is provided with embedded reinforcement plates 14. The width of the reinforcement plate is equal to the width of the frame beam, and the reinforcement plate is fixed in the steel cage of the frame beam before the concrete is poured into the frame beam, and then the concrete is poured, which not only realizes the connection between different material properties, that is, the connection between reinforced concrete and steel, but also provides a welding point for the connection of the first outer baffle plate 3 in the disc spring 4 self-resetting energy-absorbing connection device, so as to better fix the energy-absorbing connection structure. The main frame structure 15 is fixedly connected to the foundation, and the swing wall 12 is hingedly connected to the foundation. Multiple composite disc springs The spring connection devices are evenly distributed between the multi-layer main frame structure 15 and the swing wall 12, and a plurality of composite disc spring connection devices are symmetrically arranged on both sides of the swing wall 12. The swing wall 12 is a reinforced concrete structure. The swing wall 12 is usually designed as a lossless structure. Therefore, in order to prevent the swing wall from being damaged during an earthquake, in actual engineering, high reinforcement or prestressing methods are usually used to prevent the longitudinal reinforcement of the swing wall 12 from yielding under a large earthquake. In order to reduce the damage to the swing wall 12 and facilitate the connection with the floor connection device, two equilateral angle steels ∠30×30×3 with the same height and width as the swing wall 12 are used as the outer mold of the swing wall 12, and the bottom of the swing wall 12 can be processed into the following shape by welding technology: Figure 2 The arc-shaped model shown facilitates the hinged design of the swing wall 12 and the foundation.

[0033] Two groups of second ear plates 13 are fixedly provided at the positions of the swing wall 12 corresponding to multiple composite disc spring connection devices. The first ear plate 1 is hingedly connected to the second ear plate 13 through a pin shaft. The second ear plate 13 welded in the thickness direction of the swing wall 12 is connected to the first ear plate 1 through a high-strength pin shaft, so that the swing wall 12 can not only swing left and right within the wall plane, but also limit the rotation of the wall around the height direction of the swing wall 12. In addition, since the swing wall 12 will produce a vertical displacement relative to the main frame structure 15 during the left and right swinging of the swing wall 12 around the hinge support, the pin connection between the second ear plate 13 and the first ear plate 1 can relax the translational freedom of the floor connection device in the wall height direction and the rotational freedom around the wall thickness direction, thereby ensuring that the disc spring 4 self-resetting energy-absorbing connection device does not cause structural or self-damage during the swinging process.

[0034] The working process is as follows:

[0035] S1. The connection between the composite disc spring connection device and the swing wall 12 has the effect of self-resetting and energy dissipation, and also has the function of transmitting horizontal force under small earthquakes and absorbing energy under large earthquakes. That is, when the load is small, the disc spring 4 self-resetting and energy dissipation connection device will not produce relative displacement with the swing wall 12, that is, there is no relative rotation between the second ear plate 13 and the first ear plate 1. At this time, the connection between the composite disc spring connection device and the swing wall 12 is approximately equivalent to a traditional rigid node, which can transmit the axial horizontal force of the main frame structure 15.

[0036] S2. As the load increases, there is a relative displacement between the composite disc spring connection device and the swing wall 12, that is, when the second ear plate 13 rotates with the first ear plate 1, the first ear plate 1 drives the composite disc spring connection device to rotate around the pin shaft through the second outer baffle plate 8. During the rotation process, the disc spring pressure will also increase, and the disc spring provides elastic restoring force, thereby realizing the reset of the self-reset node;

[0037] S3, when the positive bending moment acts, the disc spring 4 and the rubber pad 7 will be squeezed and deformed to absorb part of the seismic energy, and the seismic energy can also be dissipated through the mutual friction between the friction plate and the friction plate, so the effect of energy dissipation and shock absorption can be achieved;

[0038] S4. In the unloading stage, as the external load decreases, the spring torque generated by the composite disc spring connection device overcomes the friction torque generated by the web friction device. At this time, the second ear plate 13 and the first ear plate 1 rotate in the opposite direction, so that the connection between the composite disc spring connection device and the swing wall 12 is restored to the initial state, thereby achieving a reset effect;

[0039] S5. If the connection structure is damaged, the connection between the composite disc spring connection device and the swing wall 12 can be released by adjusting the pin between the second ear plate 13 and the first ear plate 1, and the connection between the composite disc spring connection device and the main frame structure 15 can be released by adjusting the high-strength bolt 2. The composite disc spring connection device is removed from the reinforced concrete frame swing wall structure by adjusting the thrust base plate 9 and the hexagonal locking nut 10. Then the damaged disc spring 4, gasket 5 and rubber pad 7 in the composite disc spring connection device are removed and replaced. The entire replaceable process is convenient and fast, which can not only replace the damper with higher cost, but also has the same self-resetting effect as the prestressed tendons. Especially in the construction of small buildings, the production cost is greatly reduced, which can not only achieve the function of dissipating earthquake energy, but also achieve the reset of the structure after the earthquake. It is an economical, practical, simple-structured connection device suitable for engineering applications. Moreover, the replaceable performance of this device is not only conducive to reducing the cost and time of post-earthquake repair, but also improves the earthquake resistance and disaster prevention resilience of the building.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A replaceable disc spring connection device with self-resetting energy dissipation function, characterized in that: It comprises a plurality of composite disc spring connection devices used in a frame rocking wall structure, the composite disc spring connection device comprising a plurality of disc springs (4), and gaskets (5) are arranged between the plurality of disc springs (4); The left and right sides of the composite disc spring connection device are both equipped with second outer baffle plates (8), and the upper and lower sides of the second outer baffle plates (8) are both equipped with first outer baffle plates (3). The second outer baffle plate (8) on the left side of the composite disc spring connection device is fixedly provided with a first ear plate (1), and the second outer baffle plate (8) on the right side of the composite disc spring connection device is fixedly provided with a thrust base plate (9), and the thrust base plate (9) is provided with a plurality of hexagonal locking nuts (10). A ductile hexagonal socket bolt (11) is penetrated at the center of the second outer baffle plate (8), and a sliding sleeve (6) is provided between the plurality of disc springs (4) and the ductile hexagonal socket bolt (11). The ductile hexagonal socket bolt (11) is set through the composite disc spring connection device and the thrust base plate (9).

2. A replaceable disc spring connection device with self-resetting energy dissipation function according to claim 1, characterized in that: The frame swing wall structure comprises a main frame structure (15) and a swing wall (12); the main frame structure (15) is multi-layered, the main frame structure (15) is fixedly connected to a foundation, the swing wall (12) is hingedly connected to the foundation, a plurality of composite disc spring connection devices are evenly distributed between the multi-layer main frame structure (15) and the swing wall (12), and a plurality of composite disc spring connection devices are symmetrically arranged on both sides of the swing wall (12).

3. A replaceable disc spring connection device with self-resetting energy dissipation function according to claim 2, characterized in that: Two groups of second ear plates (13) are fixedly provided at positions of the swing wall (12) corresponding to the plurality of composite disc spring connection devices, and the first ear plate (1) is hingedly connected to the second ear plate (13) via a pin.

4. A replaceable disc spring connection device with self-resetting energy dissipation function according to claim 2, characterized in that: The multi-layer main frame structure (15) is provided with embedded reinforcing plates (14) on both upper and lower sides of the composite disc spring connection device.

5. A replaceable disc spring connection device with self-resetting energy dissipation function according to claim 1, characterized in that: The second outer baffle plate (8) and the first outer baffle plate (3) are connected in a cooperative manner via high-strength bolts (2).

6. A replaceable disc spring connection device with self-resetting energy dissipation function according to claim 1, characterized in that: The composite disc spring connection device is provided with rubber pads (7) on the inner sides of the two second outer baffles (8).

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