Limiting, buffering and vibration isolating device

Abstract

The invention provides a limiting buffer vibration isolation device, and belongs to the technical field of vibration damping, the device comprises an upper cover, a step hole structure is formed in the upper cover, one side of the step hole structure is provided with an opening, and the other side of the step hole structure is provided with a through hole communicated with a step hole; the lower sealing cover is fixedly connected with the upper cover, so that a cavity is formed; the buffering bush is arranged in the cavity and is matched with the upper cover and the lower sealing cover; one end of the mandrel is mounted in the through hole, and the other end of the mandrel partially penetrates through the cavity, so that an annular cavity is formed among the upper cover, the lower sealing cover and the mandrel; the base is arranged in the annular cavity, and a bulge extending in the radial direction is arranged in the base, so that an upper cavity and a lower cavity which are distributed up and down are formed between the base and the mandrel; the anti-vibration pad is arranged in the upper cavity and the lower cavity; the limiting ring is installed at the end, located in the annular cavity, of the base and limited in the annular cavity by the buffering bush.

Description

Technical Field

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

[0002] With the rapid development of weapons and aerospace equipment, the pyrotechnic shock environment during the launch of aerospace equipment requires that the equipment or devices have good vibration isolation and buffering effects and high impact resistance. The impact load during the launch of weapons and equipment will have an adverse effect on mechanical equipment, and the impact of the separation of spacecraft and rocket will affect the normal operation of aerospace equipment with sensitive components and even the spacecraft, and in severe cases, it may even lead to the failure of the launch mission. For this reason, a buffer device that is adapted to the vibration isolation and impact buffering needs of weapons and equipment or aerospace equipment is needed.

[0003] Existing buffer devices are usually vibration isolators with a single structural stiffness form such as metal mesh, metal rubber, rubber, etc., which only have a good vibration isolation and buffering effect for a single working condition, and cannot achieve vibration isolation and impact buffering for a complex working condition of vibration environment and high-value impact load. For example, vehicle-mounted or airborne weapons and equipment need to withstand ground loads during vehicle driving or vibration loads during aircraft flight. At the same time, mechanical equipment also needs to have good impact resistance and limiting capabilities for impact loads during weapon equipment launch; and aerospace equipment needs to withstand impact loads during launch and separation, as well as vibration loads during flight.

[0004] Therefore, a vibration isolation device that can withstand both vibration and impact combined working conditions is needed. Summary of the invention

[0005] The purpose of the present application is to provide a position limiting buffering vibration isolation device to solve or alleviate at least one problem in the background technology.

[0006] The technical solution of the present application is: a limit buffer vibration isolation device, comprising:

[0007] An upper cover, wherein a step hole structure is formed in the upper cover, wherein one side of the step hole structure is an opening and the other side is provided with a through hole connected to the step hole;

[0008] A lower cover, wherein the lower cover is fixedly connected to the upper cover to form a cavity;

[0009] A buffer bushing, which is disposed in the cavity and is adapted to fit the upper cover and the lower cover;

[0010] A core shaft, one end of which is installed in the through hole, and the other end of which partially passes through the cavity, so as to form an annular cavity between the upper cover, the lower cover and the core shaft;

[0011] A base, the base is arranged in the annular cavity, and a radially extending protrusion is provided in the base, so that an upper cavity and a lower cavity distributed vertically are formed between the base and the core shaft;

[0012] Vibration-damping pads, the vibration-damping pads being arranged in the upper cavity and the lower cavity;

[0013] A limiting ring is installed at one end of the base located in the annular cavity and is limited in the annular cavity by the buffer bushing.

[0014] In an optional embodiment of the present application, the stepped hole structure of the upper cover is configured with a flat surface with a larger diameter and a first curved surface with a smaller diameter, and the end surface of the upper cover is provided with a first mounting hole for controlling the rotation of the upper cover.

[0015] In an optional embodiment of the present application, the lower cover is a tubular step structure, and the lower cover is connected to the upper cover by a threaded structure.

[0016] In an optional embodiment of the present application, a radially extending base flange is provided on one side of the base, and a base fixing hole for connecting to a fixed foundation is provided on the base flange;

[0017] A second mounting hole for controlling the rotation of the base is provided on the side wall of the base body close to the base flange

[0018] In an optional implementation manner of the present application, the protrusion is inclined toward a side away from the base flange, and the protrusion is an arc-shaped structure, with an upper arc surface and a lower arc surface formed on both sides of the protrusion.

[0019] In an optional embodiment of the present application, one side of the core shaft has a radially extending core shaft flange, and one side surface of the core shaft flange is an arc surface, which forms a limiting structure for the vibration-damping pad set in the lower cavity.

[0020] In an optional implementation manner of the present application, the upper and lower surfaces of the vibration damping pad are both arc-shaped and are adapted to the arc surfaces on the upper cover, the protrusion and the core shaft flange.

[0021] In an optional implementation manner of the present application, the vibration damping pad is formed by pressing a metal mesh.

[0022] In an optional embodiment of the present application, a buffer pad is also included, and the buffer pad is arranged on the limiting ring.

[0023] In an optional embodiment of the present application, there is an axial displacement space between the upper surface of the buffer pad and the flat surface of the upper cover, and there is an axial displacement space between the lower part of the limit ring and the step surface of the buffer bushing; there is a radial displacement space between the buffer bushing, the limit ring and the base.

[0024] The present application can effectively solve the use requirements of weapons and aerospace equipment in a complex working environment of vibration and high-value impact and the vibration reduction and buffering function; adopts a combined stiffness design, and the low stiffness module realizes the low-frequency vibration isolation and buffering function in the vibration environment, and the high stiffness module realizes the function of limiting and buffering for large-value impact; adopts a design structure of an arc-shaped force-bearing surface to increase the force-bearing surface, provide radial load distribution, and increase radial stiffness, so that the vibration isolation device has better vibration isolation and buffering function during use; the shape of the arc-shaped vibration-damping pad decomposes the force on the arc-shaped contact surface into radial force, provides shear damping, and realizes a composite high damping design with friction damping, so as to store and absorb energy peaks of vibration and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 This is an overall schematic diagram of the limiting buffer vibration isolation device of the present application.

[0027] Figure 2 This is a cross-sectional view of the limiting buffer vibration isolation device of the present application.

[0028] Figure 3 This is a schematic diagram of the upper cover in this application.

[0029] Figure 4 This is a schematic diagram of the lower cover in this application.

[0030] Figure 5 This is a schematic diagram of the appearance of the base in this application.

[0031] Figure 6 This is a cross-sectional view of the base in this application.

[0032] Figure 7 This is a schematic diagram of the appearance of the mandrel in this application.

[0033] Figure 8 This is a cross-sectional view of the mandrel in this application.

[0034] Fig. 9 This is a schematic diagram of the appearance of the vibration damping pad in this application.

[0035] Fig.10 It is a cross-sectional view of the vibration damping pad in this application.

[0036] Fig.11 Schematic diagram of the buffer bushing in this application.

[0037] Fig.12 Schematic diagram of the limiting ring in this application.

[0038] Reference numerals:

[0039] 10-Limiting buffer vibration isolation device

[0040] 1-Upper cover

[0041] 11-Opening

[0042] 12-Piercing

[0043] 13-First curved surface

[0044] 14-Flat surface

[0045] 15-First external thread

[0046] 16-First mounting hole

[0047] 2-Lower cover

[0048] 21-First internal thread

[0049] 3- Base

[0050] 31-base flange, 311-base fixing hole

[0051] 32-Second mounting hole

[0052] 33-Second external thread

[0053] 34-protrusion, 341-upper arc surface, 342-lower arc surface

[0054] 4-Spindle

[0055] 41- mandrel flange, 411- installation notch, 412- second arc surface

[0056] 42-Second internal thread

[0057] 5-Vibration damping pad

[0058] 6-Buffer bushing

[0059] 7-limiting ring, 71-third internal thread, 72-third mounting hole

[0060] 8-Buffer pad DETAILED DESCRIPTION

[0061] 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.

[0062] The present application provides a limit buffer vibration isolation device with a simple structure and easy implementation. The device can have both vibration isolation and buffering capabilities under combined vibration and impact conditions, can achieve a good absorption effect on impact response, and can buffer and limit the spatial installation structure to avoid interference between devices caused by large displacements caused by large loads.

[0063] Figure 1 and Figure 2 As shown, the limiting buffer vibration isolation device 10 provided in the present application includes an upper cover 1, a lower cover 2, a base 3, a core shaft 4, a vibration-damping pad 5, a buffer bushing 6, a limiting ring 7 and a buffer pad 8.

[0064] like Figure 3 As shown, the upper cover 1 is generally cylindrical, with an opening 11 provided on one side of the body, a first external thread 15 provided on the outer surface of one side of the opening 11, a step hole structure formed in the opening 11, a flat surface 14 with a larger diameter and a first arc surface 13 with a smaller diameter provided in the step hole structure, a through hole 12 communicating with the step hole structure provided on the other side of the body, and a first mounting hole 16 for rotating the upper cover 1 provided on the outer end surface of one side of the through hole. Usually, two or more first mounting holes 16 can be provided, and the rotation of the upper cover 1 can be controlled by inserting a pin into the first mounting hole 16.

[0065] like Figure 4 As shown, the lower cover 2 is a stepped tubular structure as a whole, with a stepped hole formed on the inner side thereof, and the side of the stepped hole with a larger diameter is provided with a first internal thread 21 adapted to the first external thread 15 in the upper cover 1, and the stepped hole with a smaller diameter can constitute a limiting structure of the opening 11 of the upper cover 1. The first external thread 15 of the upper cover 1 can be assembled to the first internal thread 21 of the lower cover 2 by using the first mounting hole 16 of the upper cover 1 and tightened, thereby forming a cavity between the upper cover 1 and the lower cover 2.

[0066] like Figure 5 and Figure 6 As shown, the main body of the base 3 is a tubular structure, and a base flange 31 is radially extended from the lower side thereof. The base flange 31 is provided with a base fixing hole 311 for connecting with a fixed foundation. A second mounting hole 32 is provided on the side wall of the base body 3 near the base flange 31. The base 3 can be rotated and installed by inserting a cylindrical pin into the second mounting hole 32. A second external thread 33 is provided on the outer surface of the base body 3 away from the base flange 31. At the same time, a radially extending protrusion 34 is provided on the inner side of the base body 3. The protrusion 34 is inclined toward the side away from the base flange 31, and the protrusion 34 is an arc-shaped structure, with an upper arc surface 341 and a lower arc surface 342 formed on both sides.

[0067] like Figure 7 and Figure 8As shown, a core shaft flange 41 is provided on one side of the body of the core shaft 4, a mounting notch 411 is provided on the edge of the core shaft flange 41, and the upper surface of the core shaft flange 41 is a second arc surface 412. In some embodiments of the present application, the mounting notch 411 can be a rectangular notch or a semicircular notch. The core shaft 4 body is a hollow shaft structure, and a second internal thread 42 is provided on the inner side thereof, which can be connected to the vibration-damped equipment by connecting bolts. One side of the non-core shaft flange 41 of the core shaft 4 body is inserted into the through hole 12 of the upper cover 1, and the two can be fixedly connected by welding, thereby forming an annular cavity between the upper cover 1, the lower cover 2 and the core shaft 4. The base 3 is placed in the annular cavity, thereby dividing the annular cavity between the base 3 and the core shaft 4 into an upper cavity A and a lower cavity B distributed up and down.

[0068] like Fig. 9 and Fig.10 As shown, the vibration damping pad 5 includes an upper vibration damping pad and a lower vibration damping pad, and the upper and lower surfaces of the upper vibration damping pad and the lower vibration damping pad are both arc surfaces. The upper vibration damping pad is arranged in cavity A, and its upper surface is adapted to the first arc surface 13 of the upper cover 1, and its lower surface is adapted to the upper arc surface 341 of the base 3, and they are closely fitted. The lower vibration damping pad is arranged in cavity B, and its upper surface is adapted to the lower arc surface 342 of the base 3, and its lower surface is adapted to the second arc surface 412 of the core shaft 4, and they are closely fitted.

[0069] In the preferred embodiment of the present application, the vibration damping pad 5 is formed by pressing a metal wire mesh. The vibration damping pad 5 constitutes a low-rigidity vibration isolation module. During the movement process, the arc surface of the vibration damping pad 5 and the upper and lower arc surfaces of the base 3 are in contact with the force decomposed into axial force and radial force. The axial force squeezes the friction damping provided by the vibration damping pad 5, and the radial force squeezes the vibration damping pad 3 to increase the lateral stiffness while providing shear damping. The friction damping and shear damping work together to improve the energy dissipation and vibration reduction effect, and at the same time support the internal position of the vibration isolation module. It can be understood that the vibration damping pad 5 can also be an elastic element of other materials with the same effect.

[0070] like Fig.11 As shown, the buffer bushing 6 is a step-shaped structure, which is arranged in the annular cavity between the upper cover 1 and the base 3. The buffer bushing 6 is tightly fitted with the inner wall surface of the upper cover 1 and the end surfaces of the step structure of the lower cover 2, and is limited by the lower cover 2.

[0071] like Fig.12 As shown, the inner wall surface of the limiting ring 7 is provided with a third internal thread 71, and the limiting ring 7 is installed on the second external thread 33 of the base 3 through the third internal thread 71. A third mounting hole 72 is provided on the end surface of the limiting ring 7 away from the base flange 31, and the limiting ring 7 can be controlled to rotate relative to the base 3 by an inserted cylindrical pin.

[0072] In some embodiments of the present application, a buffer pad 8 is provided on the end surface of the third mounting hole of the limiting ring 7, and the buffer pad 8 can be relatively fixed to the limiting ring 7 by bonding.

[0073] In the present application, there is an axial displacement space between the upper surface of the buffer pad 8 and the flat surface 14 of the upper cover 1, and there is an axial displacement space between the lower part of the limit ring 7 and the step surface of the buffer bushing 6; there is a radial displacement space between the larger diameter inner wall surface of the buffer bushing 6 and the outer ring surface of the limit ring 7, and there is a radial displacement space between the smaller diameter inner wall surface of the buffer bushing 6 and the outer cylindrical surface of the base 3 body. When the vibration isolation module is working, the buffer pad 8 and the buffer bushing 6 are not in contact with the upper cover 1, the limit ring 7 and the base 3, so that when the vibration isolation module is working, the high-rigidity impact-resistant limit buffer module does not work, and the low-frequency vibration isolation buffer design of the vibration isolation device under low-value vibration loads can be realized.

[0074] When subjected to a high-value impact load, the vibration damping pad 5 is compressed, and the axial and radial deformations are greater than the reserved displacement space. The buffer pad 8 is in axial contact with the upper cover 1, the buffer bushing 6 is in axial contact with the limit ring 7, and the buffer bushing 6 is in radial contact with the base 3 and the limit ring 7. At this time, the low-rigidity vibration isolation module continues to work to provide damping, and the high-rigidity impact-resistant limit buffer module starts to work. The high and low stiffness modules work together to store and absorb the energy peak of the impact, thereby realizing a three-axial buffering and limiting effect.

[0075] In some embodiments of the present application, the buffer pad 8 and the buffer bushing 6 may be elastic elements made of various materials with the same effect, such as rubber.

[0076] The present application can effectively solve the use requirements of weapons and aerospace equipment in a complex working environment of vibration and high-value impact and the vibration reduction and buffering function; adopts a combined stiffness design, and the low stiffness module realizes the low-frequency vibration isolation and buffering function in the vibration environment, and the high stiffness module realizes the function of limiting and buffering for large-value impact; adopts a design structure of an arc-shaped force-bearing surface to increase the force-bearing surface, provide radial load distribution, and increase radial stiffness, so that the vibration isolation device has better vibration isolation and buffering function during use; the shape of the arc-shaped vibration-damping pad decomposes the force on the arc-shaped contact surface into radial force, provides shear damping, and realizes a composite high damping design with friction damping, so as to store and absorb energy peaks of vibration and impact.

[0077] The limit buffer vibration isolation device of the present application has a simple structure and is easy to implement. The main high and low stiffness functional modules have clear boundaries. It has both vibration isolation buffering and impact limit functions, and can be applied to buffer limit in pyrotechnic impact environments. The design structure of the arc-shaped support surface inside the vibration isolation device provides radial load distribution and increases radial stiffness. This structural form overcomes the shortcoming of the conventional metal wire mesh vibration isolator with small radial stiffness. Each functional module of the vibration isolation device can be designed and functioned independently, and high and low frequency design requirements can be met as needed. The device is suitable for vibration isolation and buffering fields such as vehicle-mounted and airborne weapon equipment, satellite-mounted equipment, etc., which have limited working space requirements, have two loads of vibration and impact, but do not act at the same time.

[0078] 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 limit buffer vibration isolation device, characterized in that: include: An upper cover, wherein a step hole structure is formed in the upper cover, wherein one side of the step hole structure is an opening and the other side is provided with a through hole connected to the step hole; A lower cover, wherein the lower cover is fixedly connected to the upper cover to form a cavity; A buffer bushing, which is disposed in the cavity and is adapted to fit the upper cover and the lower cover; A core shaft, one end of which is installed in the through hole, and the other end of which partially passes through the cavity, so as to form an annular cavity between the upper cover, the lower cover and the core shaft; A base, the base is arranged in the annular cavity, and a radially extending protrusion is provided in the base, so that an upper cavity and a lower cavity distributed vertically are formed between the base and the core shaft; Vibration-damping pads, the vibration-damping pads being arranged in the upper cavity and the lower cavity; A limiting ring is installed at one end of the base located in the annular cavity and is limited in the annular cavity by the buffer bushing.

2. The position limiting buffering and vibration isolating device according to claim 1, characterized in that: The stepped hole structure of the upper cover is configured with a flat surface with a larger diameter and a first curved surface with a smaller diameter, and the end surface of the upper cover is provided with a first mounting hole for controlling the rotation of the upper cover.

3. The position limiting buffering and vibration isolating device according to claim 2, characterized in that: The lower cover is a tubular step structure, and the lower cover is connected to the upper cover via a threaded structure.

4. The position limiting buffering and vibration isolating device according to claim 3, characterized in that: A radially extending base flange is provided on one side of the base, and a base fixing hole for connecting to a fixed foundation is provided on the base flange; A second mounting hole for controlling the rotation of the base is provided on the side wall of the base body close to the base flange.

5. The position limiting buffering and vibration isolating device according to claim 4, characterized in that: The protrusion is inclined toward a side away from the base flange, and the protrusion is an arc-shaped structure, with an upper arc surface and a lower arc surface formed on both sides of the protrusion.

6. The position limiting buffering and vibration isolating device according to claim 5, characterized in that: One side of the core shaft is provided with a radially extending core shaft flange, and one side surface of the core shaft flange is an arc surface, which forms a limiting structure for the vibration-damping pad arranged in the lower cavity.

7. The position limiting buffering and vibration isolating device according to claim 6, characterized in that: The upper and lower surfaces of the vibration-damping pad are both arc-shaped and are adapted to the arc surfaces on the upper cover, the protrusion and the core shaft flange.

8. The position limiting buffering and vibration isolating device according to claim 7, characterized in that: The vibration-damping pad is formed by pressing a metal wire mesh.

9. The position limiting buffering and vibration isolating device according to any one of claims 1 to 8, characterized in that: It also includes a buffer pad, which is arranged on the limiting ring.

10. The position limiting buffering and vibration isolating device according to claim 9, characterized in that: There is an axial displacement space between the upper surface of the buffer pad and the flat surface of the upper cover, and there is an axial displacement space between the lower part of the limit ring and the step surface of the buffer bushing; there is a radial displacement space between the buffer bushing, the limit ring and the base.

Images