Vibration isolation and buffering composite device

Abstract

The invention provides a vibration isolation and buffering composite device, and belongs to the technical field of vibration isolation, and the device comprises a lower shell and a bottom plate which are fixedly connected to form a lower cavity; the lower core shaft is provided with a lower core shaft pressing plate extending in the radial direction, the lower core shaft pressing plate is arranged in the lower cavity, and the lower core shaft partially penetrates through the lower shell; the lower spring is arranged in the lower cavity; the lower guide sleeve is arranged on the outer side of the lower spring; the first anti-vibration pad and the second anti-vibration pad are arranged in the lower cavity and located on the two sides of the lower mandrel pressing plate; the upper shell is fixedly connected with the lower shell to form an upper cavity; the upper core shaft is provided with an upper core shaft pressing plate extending in the radial direction, the upper core shaft pressing plate is arranged in the upper cavity, and the upper core shaft partially penetrates through the upper shell to be connected with the lower core shaft; the upper spring is arranged in the upper cavity and located between the upper mandrel pressing plate and the upper shell. The upper guide sleeve is arranged on the outer side of the upper spring; and the third anti-vibration pad and the fourth anti-vibration pad are arranged in the upper cavity and located on the two sides of the upper mandrel pressing plate.

Description

Technical Field

[0001] The present application belongs to the field of vibration isolation technology, and in particular relates to a vibration isolation and buffering composite device. Background Art

[0002] The rapid development of weapons and equipment requires airborne equipment to have a wider range of adaptability to working conditions, especially for inertial navigation equipment, optoelectronic pods and other equipment. In order to have wider equipment applicability and adapt to the use requirements of different aircraft models, different flight environments, more different flight attitudes, and higher flight speeds, the vibration isolation and buffering device is required to have the following capabilities:

[0003] 1) It has more installation environments, and can be used in both forward mounting, reverse mounting, and side mounting under different overload environments, and has relatively consistent and better functional requirements (consistency in terms of vibration isolation efficiency and resonance frequency);

[0004] 2) It has a relatively consistent vibration isolation effect on broadband random vibrations of different magnitudes (the vibration isolation efficiency tends to be consistent);

[0005] 3) It has a good suppressive effect on the large impact load generated during operation, and the impact value is not amplified (the impact is not amplified as much as possible in a limited space);

[0006] 4) It should meet reliability requirements under different acceleration overload environments while also meeting good functional requirements (consistency in terms of vibration isolation efficiency and frequency, etc.).

[0007] Existing vibration isolators such as metal mesh, metal rubber, and rubber all have good vibration isolation and buffering effects, and can also be used in upright and inverted environments. However, the functional modules of the products in upright and inverted environments are not necessarily the same, so the stiffness is inconsistent. Existing vibration isolators that have both vibration isolation and shock isolation effects have complex structures and single structural stiffness forms. When used in upright and inverted environments, due to limitations such as structural design and functional component layout, their stiffness changes greatly in different assembly environments, resulting in changes in the vibration isolation effect achieved by weapons and equipment, or due to structural relationships, the life of the vibration isolation and buffering devices is greatly reduced. At the same time, the existing vibration isolators are often technically assessed as not being damaged in low-space, high-load, and impact environments, at which time the vibration isolators lose their function. In this technology, the impact response load is generally amplified by 2 to 3 times, and this technical level can no longer meet the use requirements of some weapons and equipment.

[0008] Therefore, a new vibration isolation device is needed to meet the vibration isolation and buffering installation requirements of higher-level strategic weapons and equipment. Summary of the invention

[0009] The purpose of the present application is to provide a vibration isolation and buffering composite device to solve or alleviate at least one problem in the background technology.

[0010] The technical solution of the present application is: a vibration isolation and buffering composite device, comprising:

[0011] A lower shell having a cavity;

[0012] A bottom plate, the bottom plate is fixedly connected to the lower shell to form a lower cavity;

[0013] A lower mandrel, wherein the lower mandrel has a radially extending lower mandrel pressing plate, the lower mandrel pressing plate is disposed in the lower cavity, and the lower mandrel partially passes through the lower shell;

[0014] A lower spring, the lower spring is arranged in the lower cavity and between the lower core shaft and the bottom plate, and is used to provide elastic force for the lower core shaft;

[0015] A lower guide sleeve, wherein the lower guide sleeve is arranged outside the lower spring;

[0016] A first vibration damping pad and a second vibration damping pad, wherein the first vibration damping pad and the second vibration damping pad are disposed in the lower cavity and located on both sides of the lower mandrel platen; and

[0017] An upper shell having a cavity, wherein the upper shell is fixedly connected to the lower shell to form an upper cavity;

[0018] An upper mandrel, wherein the upper mandrel has a radially extending upper mandrel pressing plate, the upper mandrel pressing plate is disposed in the upper cavity, and the upper mandrel partially passes through the upper shell, and the upper mandrel is connected to a lower mandrel passing through the lower shell;

[0019] An upper spring, the upper spring is disposed in the upper cavity and between the upper mandrel pressure plate and the upper shell, and is used to provide elastic force for the upper mandrel;

[0020] An upper guide sleeve, the upper guide sleeve being arranged outside the upper spring;

[0021] The third vibration damping pad and the fourth vibration damping pad are arranged in the upper cavity and located on both sides of the upper core shaft pressure plate.

[0022] In an optional embodiment of the present application, the two ends of the lower shell have a radially extending upper mounting plate and a lower mounting plate, and the upper shell has a radially extending mounting plate, and the upper mounting plate and the lower mounting plate are respectively connected to the mounting plates of the base plate and the upper shell through connecting parts.

[0023] In an optional embodiment of the present application, the bottom plate is located on one side of the lower cavity and has a boss for positioning the lower spring.

[0024] In an optional embodiment of the present application, the first vibration damping pad has the same thickness as the third vibration damping pad, the second vibration damping pad has the same thickness as the fourth vibration damping pad, and the thickness of the first vibration damping pad and the third vibration damping pad is less than the thickness of the second vibration damping pad and the fourth vibration damping pad.

[0025] In an optional implementation manner of the present application, the first vibration damping pad, the second vibration damping pad, the third vibration damping pad, and the fourth vibration damping pad are all metal mesh pads.

[0026] In an optional embodiment of the present application, the first vibration damping pad and the third vibration damping pad are symmetrically distributed on both sides of the connection surface between the lower shell and the upper shell, thereby forming an upper buffer module and a lower buffer module;

[0027] The lower spring, the lower guide sleeve and the second vibration-damping pad are arranged at the lower end of the lower core shaft in a radial order from the inside to the outside, thereby forming a lower vibration isolation module distributed in the lower cavity;

[0028] The upper spring, the upper guide sleeve and the fourth vibration-damping pad are arranged at the upper end of the upper core shaft in a radial order from the inside to the outside, thereby forming an upper vibration isolation module distributed in the upper cavity.

[0029] In an optional implementation manner of the present application, axial and radial displacements are provided between the upper vibration isolation module and the upper buffer module, and between the lower vibration isolation module and the lower buffer module.

[0030] In an optional embodiment of the present application, a tight fit is adopted between the lower spring and the lower core shaft as well as between the upper spring and the upper core shaft, thereby forming an axial friction loss unit.

[0031] In an optional embodiment of the present application, the lower core shaft is connected to the upper core shaft by a threaded structure, and the distance between the lower core shaft pressure plate of the lower core shaft and the upper core shaft pressure plate of the upper core shaft is changed by the threaded structure to adjust the compression amount of the upper and lower vibration isolation modules.

[0032] In an optional embodiment of the present application, a gasket is further included, which is arranged between the fourth vibration-damping pad and the upper shell to form a friction loss unit.

[0033] The present application effectively solves the vibration isolation and buffering requirements of weapons and equipment in the fields of airborne and optoelectronic pods in different navigation postures (corresponding to upright, inverted, and side-mounted vibration isolation and buffering composite devices), different working conditions (corresponding to different vibration environments), and different acceleration overloads; the elastic element is designed in a symmetrical manner up and down, and the product is completely consistent in upright and inverted use; the three-dimensional displacement space consistency design is adopted to effectively solve the problem of low lateral static stiffness of traditional vibration isolators; the structural form of a combination of high-rigidity modules and low-rigidity modules is adopted to realize the design of three-axis six-way dynamic and static stiffness; the high and low stiffness modules are designed in parallel, so that the vibration isolation and buffering devices have a certain amount of vibration (when they will not touch each other under small displacement) during use. It has good low-frequency characteristics and good high-frequency characteristics when used in impact, large overload, and acceleration (when touching the first and second vibration damping pads under large displacement) environments; at the same time, the first vibration damping pad and the fourth vibration damping pad are connected in parallel, which can effectively reduce the deformation of the vibration isolation module mesh pad (the fourth vibration damping pad) under large loads and increase the product life of the vibration isolation and buffering composite device; a large preload design method is adopted to form an internal friction mechanism between the gasket and the shell, and the spring and the mounting core, which effectively reduces the amplification factor at the resonance of the device and improves the stability and structural reliability of the vibration-isolated equipment; a large preload design method is adopted in combination with the spring composite mesh pad design method to improve the structural stability and performance stability of the vibration isolation and buffering device while improving the continuity of the overall stiffness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0035] Figure 1 This is a schematic diagram of the appearance of the vibration isolation and buffering composite device of the present application.

[0036] Figure 2 This is an internal cross-sectional view of the vibration isolation and buffering composite device of the present application.

[0037] Figure 3 This is a schematic diagram of the lower shell in this application.

[0038] Figure 4 Schematic diagram of the lower mandrel in this application.

[0039] Figure 5 This is a schematic diagram of the upper mandrel in this application.

[0040] Reference numerals:

[0041] 11-lower housing, 111-lower mounting plate, 112-upper mounting plate, 113-through hole

[0042] 12-lower mandrel, 121-lower mandrel pressure plate, 122-external thread structure

[0043] 13-First vibration damping pad

[0044] 14-Second vibration damping pad

[0045] 15-Lower guide bushing

[0046] 16-Lower spring

[0047] 17-base plate, 171-boss

[0048] 21-Upper shell

[0049] 22-upper mandrel, 221-upper mandrel pressure plate, 222-internal thread structure

[0050] 23-Third vibration damping pad

[0051] 24-Fourth vibration damping pad

[0052] 25-Upper guide sleeve

[0053] 26- Upper spring

[0054] 27-Gasket DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0056] The present application proposes a vibration isolation and buffering composite device, which has a simple structure, is easy to implement, and has both vibration isolation and buffering capabilities. The structure is symmetrical in the upright and inverted states, can realize a three-axis six-way installation design, and has flight adaptability in multiple postures. At the same time, a friction energy dissipation damping unit is introduced, which, on the one hand, achieves a better absorption effect on the impact response peak, and on the other hand, has a certain inhibitory effect on the excessive amplification factor at the system resonance.

[0057] like Figure 1 and Figure 2 As shown, the vibration isolation and buffering composite device provided in the present application includes: a lower shell 11, a lower core shaft 12, a first vibration damping pad 13, a second vibration damping pad 14, a lower guide sleeve 15, a lower spring 16, a base plate 17 and an upper shell 21, an upper core shaft 22, a third vibration damping pad 23, a fourth vibration damping pad 24, an upper guide sleeve 25, and an upper spring 26.

[0058] like Figure 3As shown, the main body of the lower shell 11 is a cylindrical structure with a cavity inside. The lower side of the lower shell 11 is open inside and the upper side is a plane. The plane of the lower shell 11 is provided with a through hole 113 for the lower core shaft 12 to pass through. In addition, radially extending lower mounting plates 111 and upper mounting plates 112 are provided at both ends of the lower shell 11. The lower mounting plates 111 and the upper mounting plates 112 are respectively provided with bolt holes for connecting with the bottom plate 17 and the upper shell 21.

[0059] The bottom plate 17 is installed at the opening of the lower housing 11, and can be fixed to the lower housing 11 by bolts, so that a lower cavity can be formed between the bottom plate 17 and the lower housing 11. The inner side surface of the bottom plate 17 (i.e., one side in the cavity) is provided with a boss 171 for positioning the lower spring 16.

[0060] like Figure 4 As shown, the main body of the lower mandrel 12 is a step structure, and a radially extending lower mandrel pressing plate 121 is provided on the main body structure. The upper end of the main body of the lower mandrel 12 is provided with an external thread structure 122 for threaded connection with the upper mandrel 22. The lower mandrel pressing plate 121 of the lower mandrel 12 is arranged in the lower cavity, and its main body passes through the through hole of the lower shell 11. There is a gap between the main body of the lower mandrel 12 and the through hole 113 of the lower shell 11, which can provide the displacement required for the lateral movement of the vibration isolation buffer device.

[0061] The lower spring 16 is sleeved between the boss 171 of the bottom plate 17 and the main structure of the lower mandrel 12 to provide elastic force for the lower mandrel 12 .

[0062] The first vibration-damping pad 13 and the second vibration-damping pad 14 are disposed in the lower cavity and are respectively located on the upper side and the lower side of the lower mandrel pressing plate 121 of the lower mandrel 12 .

[0063] The lower guide sleeve 15 is arranged on the outer side of the lower spring 16 .

[0064] Similarly, the upper shell 21 is a cylindrical structure with a cavity inside. The lower side of the upper shell 21 is open and the upper side is a plane, and the plane is provided with a through hole for the upper core shaft 22 to pass through. The lower end of the upper shell 21 is provided with a radially extending mounting plate, which is fixedly connected to the lower shell 11 by bolts. Thus, an upper cavity can be formed between the upper shell 21 and the lower shell 11.

[0065] like Figure 5As shown, the main body of the upper mandrel 22 is a circular tubular structure, and an internal thread structure 222 is provided inside the upper mandrel 22. The internal thread structure 222 cooperates with the external thread structure 122 of the lower mandrel 12 to achieve the connection between the two and the positioning of the upper mandrel 22. The lower end of the main body of the upper mandrel 22 is provided with an upper mandrel pressing plate 221, which is arranged in the upper cavity, and the main part of the upper mandrel 22 passes through the through hole of the upper shell 21. Among them, the upper end of the internal thread 222 of the upper mandrel 22 can be connected to the mounting ear seat (not shown) of the vibration-damped equipment through bolts.

[0066] The upper spring 26 is sleeved on the outer side of the main body of the upper core shaft 22 and is located between the upper core shaft pressure plate 221 and the upper shell 21 , and is used to provide elastic force for the upper core shaft 22 .

[0067] The third vibration-damping pad 23 and the fourth vibration-damping pad 24 are disposed in the upper cavity and are respectively located at the lower side and the upper side of the upper mandrel pressing plate 221 of the upper mandrel 22 .

[0068] The upper guide sleeve 25 is arranged on the outer side of the upper spring 16 .

[0069] The lower spring 16, the lower guide sleeve 15, and the second vibration damping pad 14 are assembled at the lower end of the lower core shaft 12 in a radial order from the inside to the outside, thereby forming a lower vibration isolation module distributed in the lower cavity. The upper spring 26, the upper guide sleeve 25, and the fourth vibration damping pad 24 are assembled at the upper end of the upper core shaft 22 in a radial order from the inside to the outside, thereby forming an upper vibration isolation module distributed in the upper cavity. The first vibration damping pad 13 and the third vibration damping pad 23 are symmetrically assembled on both sides of the plane of the lower shell 11 to form an upper buffer module and a lower buffer module, and are respectively divided into the upper cavity and the lower cavity.

[0070] In a preferred embodiment of the present application, the diameters of the first vibration damping pad 13, the second vibration damping pad 14, the third vibration damping pad 23, and the fourth vibration damping pad 24 are the same or similar. Further, the thicknesses of the first vibration damping pad 13 and the third vibration damping pad 23 are the same or similar, the thicknesses of the second vibration damping pad 14 and the fourth vibration damping pad 24 are the same or similar, and the thicknesses of the first vibration damping pad 13 and the third vibration damping pad 23 are less than the thicknesses of the second vibration damping pad 14 and the fourth vibration damping pad 24.

[0071] In some embodiments of the present application, the first vibration damping pad 13 , the second vibration damping pad 14 , the third vibration damping pad 23 , and the fourth vibration damping pad 24 are all metal mesh pads.

[0072] In the present application, axial and radial displacements (hereinafter referred to as high-rigidity module starting displacements) are reserved between the upper vibration isolation module and the upper buffer module, and between the lower vibration isolation module and the lower buffer module. When working under a certain load or a certain displacement condition (the displacement is less than the high-rigidity module starting displacement), the vibration isolation module is in a linear working area, which can achieve better vibration isolation effects under different working conditions. Taking axial downward movement as an example, when working under a large overload or large displacement condition (the displacement is greater than the high-rigidity module starting displacement), the lower mandrel pressure plate 121 of the lower mandrel 12 acts on the lower vibration isolation module, and the upper mandrel pressure plate 221 of the upper mandrel 22 acts on the upper buffer module. The lower vibration isolation module is connected in parallel with the upper buffer module, and the stiffness of the composite device is greatly increased, which can realize a three-axial anti-overload design, effectively reducing the accelerated fatigue and reduced life caused by excessive strain of the vibration damping pad, and the permanent plastic deformation and irrecoverable problems of the vibration damping pad under large deformation, and effectively improving the life and performance stability.

[0073] In some embodiments of the present application, a tight fit is adopted between the lower spring 16 and the main body of the lower core shaft 12, and between the upper spring 26 and the main body of the upper core shaft 22, so as to form an axial friction loss unit, which increases the axial structural damping during axial movement, and effectively reduces the amplification factor and impact amplification problems under resonance conditions.

[0074] In some embodiments of the present application, the device further includes a gasket 27, which is disposed between the fourth vibration damping pad 24 and the upper shell 21. The upper vibration isolation module formed by the upper spring 26, the upper guide sleeve 25, and the fourth vibration damping pad 24 has a certain amount of preload, and the gasket 27 is tightly matched with the upper shell 21, and the gasket 27 and the upper shell 21 form a friction loss unit, which can effectively increase the structural damping when moving sideways, and effectively reduce the amplification factor and impact amplification problems under the system resonance condition.

[0075] In the present application, a laterally (radially) movable space is provided between the lower core shaft pressure plate 121 of the lower core shaft 12 and the inner wall of the lower shell 11, between the upper core shaft pressure plate 221 of the upper core shaft 22 and the inner wall of the upper shell 21, and between the gasket 27 and the inner wall of the upper shell 21. An axially movable space is provided between the lower core shaft pressure plate 121 of the lower core shaft 12 and the planar lower side of the lower shell 11, and between the upper core shaft pressure plate 221 of the upper core shaft 22 and the planar upper side of the lower shell 11. Through the design of the axially and radially movable space, the lateral and axial static load-bearing capacity of the integrated vibration isolation and buffering device can be designed.

[0076] In the present application, the distance between the lower core shaft pressure plate 121 of the lower core shaft 12 and the upper core shaft pressure plate 221 of the upper core shaft 22 can be adjusted through a threaded structure. By changing the distance, the compression amount of the upper and lower vibration isolation modules can be adjusted, the stiffness of the vibration isolation module of the vibration isolation and buffer composite device can be changed, and the starting displacement of the high stiffness module can be changed, thereby quickly changing the performance parameters of the vibration isolation and buffer composite device.

[0077] In the present application, the lateral compression area can be adjusted by designing the height of the lower core shaft body on the lower side of the lower core shaft pressure plate 121, the height of the lower guide sleeve 15 and the upper guide sleeve 25, and the lateral stiffness of the integrated vibration isolation and buffering device can be designed, thereby realizing the design of three-axis six-way dynamic and static stiffness and other stiffness.

[0078] The present application effectively solves the vibration isolation and buffering requirements of weapons and equipment in the fields of airborne and optoelectronic pods in different navigation postures (corresponding to upright, inverted, and side-mounted vibration isolation and buffering composite devices), different working conditions (corresponding to different vibration environments), and different acceleration overloads; the elastic element is designed in a symmetrical manner up and down, and the product is completely consistent in upright and inverted installation. The three-dimensional displacement space consistency design is adopted to effectively solve the problem of low lateral static stiffness of traditional vibration isolators; the structural form of a combination of high-rigidity modules and low-rigidity modules is adopted to realize the design of three-axis six-way dynamic and static stiffness; the high and low stiffness modules are designed in parallel to make The vibration isolation and buffering device has good low-frequency characteristics when used under a certain amount of vibration, and has good high-frequency characteristics when used in impact, large overload, and acceleration environments; at the same time, the parallel method can effectively reduce the deformation of the vibration isolation module mesh pad under large loads, and increase the product life of the vibration isolation and buffering composite device; the large pre-load design method is adopted to form an internal friction mechanism between the gasket and the shell, the spring and the mounting core, and effectively reduce the amplification factor at the resonance of the device; the large pre-load design method is adopted, and the spring composite mesh pad design method is used to improve the structural stability and performance stability of the vibration isolation and buffering device, while improving the continuity of the overall stiffness of the system.

[0079] The vibration isolation and buffering composite device of the present application has the following advantages:

[0080] First, the structure is simple, the vibration isolation and buffer modules are connected in parallel, and the stiffness is convertible, which can achieve the consistency requirements of functionality (vibration isolation efficiency, resonance frequency, etc.) under different values ​​within a certain value range;

[0081] Second, through the parallel design of vibration isolation and buffer modules, the high-rigidity module can be activated under large values ​​and large displacements, effectively reducing the strain of the vibration isolation module mesh pad under large values ​​and large displacements, while avoiding the irrecoverability of the mesh pad caused by large values ​​and large displacements, thereby increasing the service life of the vibration isolation module and improving functional stability;

[0082] Third, through the design of axial and radial movable space, the axis and lateral stiffness of the vibration isolation and buffer composite device are designed to achieve the three-axis and six-way dynamic and static load-bearing capacity of the vibration isolation and buffer device, and at the same time realize the three-axis and six-way installable design;

[0083] Fourth, the axial and radial friction loss units are formed inside, which effectively reduce the excessive amplification and impact amplification at the resonance of the system through the internal damping loss, improve the control accuracy of the vibration-isolated equipment, especially the optoelectronic equipment, and enhance the reliability of the equipment;

[0084] Fifth; through design, three-axis six-way dynamic and static stiffness design can be achieved;

[0085] Fifth, it solves the use requirements of advanced weapons in different flight attitudes, different accelerations, different values, and different installation environments. It is suitable for airborne, shipborne, missile-borne and other vibration isolation and buffering application fields that have high requirements on frequency stability, high product life, and high installation applicability.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vibration isolation and buffering composite device, characterized in that: include: A lower shell having a cavity; A bottom plate, the bottom plate is fixedly connected to the lower shell to form a lower cavity; A lower mandrel, wherein the lower mandrel has a radially extending lower mandrel pressing plate, the lower mandrel pressing plate is disposed in the lower cavity, and the lower mandrel partially passes through the lower shell; A lower spring, the lower spring is arranged in the lower cavity and between the lower core shaft and the bottom plate, and is used to provide elastic force for the lower core shaft; A lower guide sleeve, wherein the lower guide sleeve is arranged outside the lower spring; A first vibration damping pad and a second vibration damping pad, wherein the first vibration damping pad and the second vibration damping pad are disposed in the lower cavity and located on both sides of the lower mandrel platen; and An upper shell having a cavity, wherein the upper shell is fixedly connected to the lower shell to form an upper cavity; An upper mandrel, wherein the upper mandrel has a radially extending upper mandrel pressing plate, the upper mandrel pressing plate is disposed in the upper cavity, and the upper mandrel partially passes through the upper shell, and the upper mandrel is connected to a lower mandrel passing through the lower shell; An upper spring, the upper spring is disposed in the upper cavity and between the upper mandrel pressure plate and the upper shell, and is used to provide elastic force for the upper mandrel; An upper guide sleeve, the upper guide sleeve being arranged outside the upper spring; The third vibration damping pad and the fourth vibration damping pad are arranged in the upper cavity and located on both sides of the upper core shaft pressure plate.

2. The vibration isolation and buffering composite device according to claim 1, characterized in that: The two ends of the lower shell are provided with a radially extending upper mounting plate and a lower mounting plate, and the upper shell is provided with a radially extending mounting plate, and the upper mounting plate and the lower mounting plate are respectively connected to the bottom plate and the mounting plate of the upper shell through connecting pieces.

3. The vibration isolation and buffering composite device according to claim 1, characterized in that: The bottom plate is located at one side of the lower cavity and has a boss for positioning the lower spring.

4. The vibration isolation and buffering composite device according to claim 1, characterized in that: The first vibration damping pad has the same thickness as the third vibration damping pad, the second vibration damping pad has the same thickness as the fourth vibration damping pad, and the thickness of the first vibration damping pad and the third vibration damping pad is smaller than the thickness of the second vibration damping pad and the fourth vibration damping pad.

5. The vibration isolation and buffering composite device according to claim 4, characterized in that: The first vibration damping pad, the second vibration damping pad, the third vibration damping pad and the fourth vibration damping pad are all metal mesh pads.

6. The vibration isolation and buffering composite device according to claim 4 or 5, characterized in that: The first vibration damping pad and the third vibration damping pad are symmetrically distributed on both sides of the connection surface between the lower shell and the upper shell, thereby forming an upper buffer module and a lower buffer module; The lower spring, the lower guide sleeve and the second vibration-damping pad are arranged at the lower end of the lower core shaft in a radial order from the inside to the outside, thereby forming a lower vibration isolation module distributed in the lower cavity; The upper spring, the upper guide sleeve and the fourth vibration-damping pad are arranged at the upper end of the upper core shaft in a radial order from the inside to the outside, thereby forming an upper vibration isolation module distributed in the upper cavity.

7. The vibration isolation and buffering composite device according to claim 6, characterized in that: Axial and radial displacements are provided between the upper vibration isolation module and the upper buffer module, and between the lower vibration isolation module and the lower buffer module.

8. The vibration isolation and buffering composite device according to claim 6, characterized in that: The lower spring and the lower core shaft as well as the upper spring and the upper core shaft are tightly matched to form an axial friction loss unit.

9. The vibration isolation and buffering composite device according to claim 1, characterized in that: The lower mandrel is connected to the upper mandrel by a threaded structure, and the distance between the lower mandrel pressing plate of the lower mandrel and the upper mandrel pressing plate of the upper mandrel is changed by the threaded structure to adjust the compression amount of the upper and lower vibration isolation modules.

10. The vibration isolation and buffering composite device according to claim 1, characterized in that: A gasket is also included, which is arranged between the fourth vibration-damping pad and the upper shell to form a friction loss unit.

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