Three-way dynamic and static bearing vibration reduction buffer device

Abstract

The invention belongs to the technical field of vibration reduction devices, and particularly relates to a three-way dynamic and static bearing vibration reduction buffer device which comprises a shell, a mounting plate, a mandrel, a spring, an elastic cushion and an elastic strip. The shell and the mounting plate are connected to form a cavity shell with a containing cavity, and the mounting plate is provided with an opening; the mandrel comprises a mandrel body, a threaded end located at one end of the mandrel body and a mounting end located at the other end of the mandrel body, the mandrel body penetrates through the hole of the mounting plate to enable the mounting end to be arranged in the cavity shell, and the threaded end is arranged outside the cavity shell; the mounting end is provided with a plurality of mounting surfaces, a spring is arranged between each mounting surface and the wall surface of the cavity shell, an elastic strip is mounted on each mounting surface, and a set distance is reserved between each elastic strip and the wall surface of the cavity shell; and an elastic cushion is filled in the accommodating cavity outside the spring. The vibration damping and buffering device has a good vibration damping and buffering effect on three-axis six-direction vibration and impact.

Description

Technical Field

[0001] This application belongs to the technical field of vibration damping devices, and particularly relates to a three-way dynamic and static load-bearing vibration damping and buffering device. Background Art

[0002] During flight, ultra-high-speed and highly maneuverable aircraft have flight conditions such as high-speed flight and high maneuverability. Consequently, it is required that the vibration damping and buffering device not only has good vibration damping, buffering, and anti-overload capabilities, but also needs the vibration damping and buffering device to have three-axis six-direction dynamic and static load-bearing capabilities under acceleration overload and three-axis six-direction installation, vibration damping, and buffering capabilities under overload acceleration. The above requirements cannot be met by existing vibration damping and buffering technologies.

[0003] 1) Chinese Patent No. 201110431024.9 discloses a fully enclosed stiffness-adjustable vibration isolator. This patent uses a rubber material full-envelope structure and has three-axis six-direction load-bearing capabilities. However, since its material is an incompressible body, under large deformations, the rigidity and damping of the vibration damping structure change non-linearly, resulting in a weak vibration damping effect. At the same time, under large displacements, the vibration isolator is prone to accelerating the fatigue of elastic elements and reducing the service life.

[0004] 2) Chinese Patent No. 201910563018.5 discloses a stiffness self-adaptive vibration isolator. Due to its structure being designed for vertical load-bearing, its response effect to three-axis six-direction static load-bearing conditions is poor. Summary of the Invention

[0005] To solve the above problems, this application provides a three-way dynamic and static load-bearing vibration damping and buffering device, including: A housing, a mounting plate, a core shaft, a spring, an elastic pad, and an elastic strip; The housing is connected to the mounting plate to form a cavity shell with a cavity. The mounting plate has an opening. The core shaft includes a shaft body, a threaded end located at one end of the shaft body, and a mounting end located at the other end of the shaft body. The shaft body passes through the opening of the mounting plate so that the mounting end is placed inside the cavity shell, and the threaded end is placed outside the cavity shell. The mounting end has a plurality of mounting surfaces. A spring is provided between each mounting surface and the wall surface of the cavity shell. An elastic strip is mounted on each mounting surface, and a set distance is reserved between the elastic strip and the wall surface of the cavity shell. An elastic pad is filled in the cavity outside the spring.

[0006] Preferably, the housing is in the shape of a cubic box, and one end surface thereof has an opening. The mounting plate is riveted at the opening and forms a cubic cavity with the housing.

[0007] Preferably, the mounting end is in the shape of a cube and includes five of the mounting surfaces and a connecting surface connected to the shaft body. The mounting surface has a cylindrical boss, and the spring is sleeved on the outer cylindrical surface of the cylindrical boss.

[0008] Preferably, the cylindrical boss has a groove, and the elastic strip is installed in the groove.

[0009] Preferably, a retaining piece is arranged on the inner side of the mounting plate. The retaining piece has a sleeve hole sleeved on the mandrel, and a spring sleeved on the shaft body is arranged between the retaining piece and the connection surface of the mounting end; the diameter of the opening of the mounting plate is larger than the diameter of the shaft body; the retaining piece slides on the surface of the mounting plate following the mandrel, and the retaining piece provides a force for the spring sleeved on the shaft body.

[0010] Preferably, the elastic pad includes six quadrangular pyramids. The lower bases of the respective quadrangular pyramids are respectively attached to one surface of the cavity shell, the inclined surfaces of adjacent quadrangular pyramids are attached to each other, the quadrangular pyramid has an inner hole penetrating through the upper base and the lower base, and the spring is placed in the inner hole.

[0011] Preferably, the compressed height of the spring is less than the length by which the elastic strip protrudes from the groove.

[0012] Preferably, the stiffness of the elastic pad is less than that of the elastic strip.

[0013] Preferably, the material of the elastic pad includes wire mesh, wire or rubber.

[0014] The advantages of the present application include: The present application adopts a composite form of a spring and an elastic pad to form a vibration damping module, which has a good vibration damping and buffering effect on vibrations and impacts from multiple directions; The present application adopts a combined structure of a spring and an elastic pad, which can effectively avoid the creep problem of the vibration damping device under large loads, ensure the assembly position of the equipment to be vibration damped, and improve the operation accuracy of airborne equipment. Description of the Drawings

[0015] Figure 1 is a cross-sectional view of a three-way static and dynamic load-bearing vibration damping and buffering device according to a preferred embodiment of the present application.

[0016] Figure 2 is a cross-sectional view of a mandrel according to a preferred embodiment of the present application.

[0017] Figure 3 is a perspective view of a mandrel according to a preferred embodiment of the present application.

[0018] Figure 4 is a cross-sectional view of an elastic pad according to a preferred embodiment of the present application.

[0019] Figure 5 is a perspective view of an elastic pad according to a preferred embodiment of the present application. Detailed Embodiments

[0020] To make the technical solution and its advantages of this application clearer, the following will further describe the technical solution of this application clearly and completely in conjunction with the accompanying drawings. It can be understood that the specific embodiments described herein are only partial embodiments of this application, which are only used to explain this application rather than limit this application. It should be noted that for the convenience of description, only the parts related to this application are shown in the drawings, and other related parts can refer to the general design. Without conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0021] In addition, it should be noted that unless otherwise clearly specified and limited, the similar terms such as "installation", "connection", and "coupling" used in the description of this application should be understood in a broad sense. For example, the connection 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 directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. Those skilled in the art can understand its specific meaning in this application according to the specific situation.

[0022] As Figures 1 - 5 shown, this application provides a three-way dynamic and static load-bearing shock absorption and buffering device, including: a housing 1, a mounting plate 2, a core shaft 3, a spring 5, an elastic pad 6, and an elastic strip 7.

[0023] The housing 1 is connected to the mounting plate 2 to form a cavity shell with a cavity, and the mounting plate 2 has an opening.

[0024] The core shaft 3 includes a shaft body, a threaded end 31 at one end of the shaft body, and a mounting end 32 at the other end of the shaft body. The shaft body passes through the opening of the mounting plate 2 so that the mounting end 32 is placed inside the cavity shell, and the threaded end 31 is placed outside the cavity shell; the mounting end 32 has a plurality of mounting surfaces, a spring 5 is arranged between each mounting surface and the wall surface of the cavity shell, an elastic strip 7 is mounted on each mounting surface, and a set distance is reserved between the elastic strip 7 and the wall surface of the cavity shell; an elastic pad 6 is filled in the cavity outside the spring 5.

[0025] Preferably, the housing 1 is in the shape of a cubic box, one end face of which has an opening, and the mounting plate 2 is riveted at the opening and forms a cubic cavity with the housing 1.

[0026] Preferably, the mounting end 32 is in the shape of a cube, including five of the mounting surfaces and a connecting surface connected to the shaft body. The mounting surfaces have cylindrical bosses, and the spring 5 is sleeved on the outer cylindrical surface of the cylindrical boss.

[0027] Preferably, the cylindrical boss has a groove 33, and the elastic strip 7 is mounted in the groove 33.

[0028] Preferably, a retaining piece 4 is arranged inside the mounting plate 2. The retaining piece 4 has a sleeve hole sleeved on the mandrel 3. A spring 5 sleeved on the shaft body is arranged between the connecting surface of the retaining piece 4 and the mounting end 32; the diameter of the opening of the mounting plate 2 is larger than the diameter of the shaft body; the retaining piece 4 slides on the surface of the mounting plate 2 following the mandrel 3, and the retaining piece 4 provides a force for the spring 5 sleeved on the shaft body.

[0029] Preferably, the elastic pad 6 includes six quadrangular pyramids. The lower bases of the respective quadrangular pyramids are respectively attached to one surface of the cavity shell, and the inclined surfaces 62 of adjacent quadrangular pyramids are attached to each other. The quadrangular pyramid has an inner hole 61 penetrating the upper base and the lower base, and the spring 5 is placed in the inner hole 61.

[0030] Preferably, the compressed height of the spring 5 is less than the length by which the elastic strip 7 protrudes from the groove 33.

[0031] Preferably, the stiffness of the elastic pad 6 is less than that of the elastic strip 7.

[0032] Preferably, the material selection of the elastic pad 6 includes wire mesh, metal wire or rubber.

[0033] After the large-displacement movement of the mandrel 3, the spring 5 has an effect of automatically restoring the central position of the elastic strip 7 and the mandrel 3, effectively solving the problem that the mandrel 3 deviates from the central position.

[0034] The vibration damping and buffering device of the present application can, through the stiffness design of the spring 5, the elastic pad 6 and the elastic strip 7, achieve a good buffering effect on vibrations, impacts and vibrations under the coupling of acceleration under different displacements and different loads. The stress and strain of the spring 5, the elastic pad 6 and the elastic strip 7 satisfy the following formula: When only the elastic pad 6 and the spring 5 are deformed, the overall stress of the elastic pad 6 and the spring 5 and strain are related as shown in the following formula: ; In the formula, is a constant value, generally taking 10%-30%; is a constant value, indicating the distance of rigid collision inside the vibration damping and buffering device. is the th relevant constant. and are both constants, related to the structural parameters of the elastic pad 6 and the spring 5.

[0035] When only the elastic strip 7 is deformed, the stress and strain of the elastic strip 7 are related as shown in the following formula: ; In the formula, is a constant value, generally taken as 10% - 30%, and is specifically determined according to the constitutive model of the elastic strip; is a constant value, generally referring to the distance of rigid collision inside the shock absorption and buffering device. is the th relevant constant, and are both constants and are related to the structural parameters of the elastic strip.

[0036] In the shock absorption and buffering device of this embodiment, the spring 5, the elastic pad 6 and the elastic strip 7 need to have a displacement conversion amount . When the displacement of the mandrel is greater than the displacement conversion amount , the overall stress and strain of the spring 5, the elastic pad 6 and the elastic strip 7 are shown in the following formula: .

[0037] The advantages of this application include: This application adopts a composite form of a spring and an elastic pad to form a shock absorption module, which plays a good role in shock absorption and buffering for vibrations and impacts from multiple directions; This application adopts a design with a three-axis and six-direction structure, so that the multi-directional load impacts generated when the aircraft pitches, yaws and rolls can be comprehensively shock-absorbed and buffered. At the same time, it has a three-axis and six-direction static load-bearing capacity, so that when the installation direction is different, its shock absorption effect is the same, solving the problem that the airborne equipment deviates from the design center due to unequal stiffness in different installation directions; This application adopts a combined structure of a spring and an elastic pad, which can effectively avoid the creep problem of the shock absorption device under large loads, ensure the assembly position of the equipment to be shock-absorbed, and improve the operation accuracy of the airborne equipment.

[0038] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A three-way dynamic and static load-bearing vibration damping and buffering device, characterized in that: include: A housing (1), a mounting plate (2), a core shaft (3), a spring (5), an elastic pad (6), and an elastic strip (7); The outer shell (1) and the mounting plate (2) are connected to form a hollow shell having a cavity, and the mounting plate (2) has an opening; The core shaft (3) comprises a shaft body, a threaded end (31) located at one end of the shaft body, and a mounting end (32) located at the other end of the shaft body; the shaft body passes through the opening of the mounting plate (2) so that the mounting end (32) is placed in the cavity shell, and the threaded end (31) is placed outside the cavity shell; the mounting end (32) has a plurality of mounting surfaces, a spring (5) is arranged between each mounting surface and the wall surface of the cavity shell, an elastic strip (7) is installed on each mounting surface, and a set distance is reserved between the elastic strip (7) and the wall surface of the cavity shell; and an elastic pad (6) is filled in the cavity outside the spring (5).

2. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 1, characterized in that: The outer shell (1) is in the shape of a cubic box, one end face of which has an opening, and the mounting plate (2) is riveted to the opening and forms a cubic cavity with the outer shell (1).

3. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 2, characterized in that: The mounting end (32) is in a cubic shape and comprises five mounting surfaces and a connection surface connected to the shaft body, the mounting surface having a cylindrical boss, and the spring (5) is sleeved on the outer cylindrical surface of the cylindrical boss.

4. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 3, characterized in that: The cylindrical boss has a groove (33), and the elastic strip (7) is installed in the groove (33).

5. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 3, characterized in that: A baffle (4) is arranged on the inner side of the mounting plate (2); the baffle (4) has a sleeve hole sleeved on the core shaft (3); a spring (5) sleeved on the shaft body is arranged between the baffle (4) and the connecting surface of the mounting end (32); the diameter of the opening of the mounting plate (2) is larger than the diameter of the shaft body; the baffle (4) follows the core shaft (3) to slide on the surface of the mounting plate (2), and the baffle (4) provides a force for the spring (5) sleeved on the shaft body.

6. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 3, characterized in that: The elastic pad (6) comprises six quadrangular pyramids, the lower base of each quadrangular pyramid is respectively fitted with a surface of the cavity shell, the inclined surfaces (62) of adjacent quadrangular pyramids are fitted with each other, the quadrangular pyramid has an inner hole (61) that passes through the upper base and the lower base, and the spring (5) is placed in the inner hole (61).

7. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 3, characterized in that: The compressed height of the spring (5) is less than the length of the elastic strip (7) protruding from the groove (33).

8. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 4, characterized in that: The elastic pad (6) has a lower rigidity than the elastic strip (7).

9. The three-way dynamic and static load-bearing vibration damping and buffering device according to claim 4, characterized in that: The elastic pad (6) may be made of metal mesh, metal wire or rubber.

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