Vibration isolation buffer device capable of automatically resetting
By designing an automatic reset vibration isolation buffer device, the friction stiffness adaptive unit is formed with the friction plate and the arc surface of the shell, the problems of poor recovery and angular vibration coupling of the vibration isolation device under large loads are solved, and performance consistency and vibration isolation effect are achieved under multiple attitudes of aviation equipment.
Patent Information
- Application Number
- CN202422921885.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing vibration isolation devices have poor recovery under large loads, and the initial position of the vibration damping buffer is deviated during vibration, and vertical angular vibration coupling is prone to occur under low space large loads and impact environments, which cannot meet the multi-positional flight and high-performance needs of aviation equipment.
The automatic reset vibration isolation buffer device is adopted, including the lower case, upper case, mandrel, partition, spacer, friction plate and vibration isolation pad. The friction stiffness adaptive unit is formed between the arc surface of the friction plate and the shell, which automatically resets after load unloading and maintains consistent performance under different load conversions.
It effectively solves the problem of poor recovery of vibration isolation buffer devices under large loads, improves the consistency of product performance, reduces the change in system height after installation, and adapts to the multi-working needs of aviation equipment. It is especially suitable for the vibration isolation and buffering fields of airborne equipment and photoelectric pods.
Smart Images
Figure CN223294141U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of vibration isolation technology, and in particular relates to an automatic reset vibration isolation buffer device. Background Art
[0002] As aircraft speed requirements become higher and higher, and multi-attitude flight maneuverability requirements become more and more, the vibration loads on aviation equipment are becoming more and more complex, the magnitude of the loads is also increasing, and the performance requirements of the equipment are also increasing. This requires the vibration isolation and buffering device to have:
[0003] 1) It has more installation applicability, meeting the requirements of front installation, inverted installation and side installation;
[0004] 2) Recovery requirements under rapid conversion of different loads;
[0005] 3) During operation, large impact loads are generated, which require displacement limitation and impact attenuation.
[0006] Existing vibration isolation devices are usually vibration isolation structures such as metal mesh, metal rubber, and rubber, which have good vibration isolation and buffering effects. They can also be used in upright and inverted environments. However, due to the creep characteristics of the material, the existing vibration isolation structure often has poor recovery after generating large stress under large loads. During vibration, the initial position of the vibration reduction and buffering deviates too much, resulting in inconsistent vibration reduction and buffering stiffness and changes in the assembly position of the aviation equipment. At the same time, the existing vibration isolation structure is generally amplified by 2 to 3 times in low-space, high-load, and impact environments. At the same time, vertical angular vibration coupling often occurs during lateral movement, which can no longer meet the use requirements of some aviation equipment.
[0007] Therefore, a new vibration isolation and buffering device is needed to adapt to the vibration isolation and buffering installation and use requirements of higher-level aviation equipment. Utility Model Content
[0008] The purpose of the present application is to provide an automatically reset vibration isolation and buffering device to solve or alleviate at least one problem in the background technology.
[0009] The technical solution of the present application is: an automatic reset vibration isolation buffer device, comprising:
[0010] A lower shell, an upper shell and a cover plate, wherein the lower shell, the upper shell and the cover plate are connected to form a cavity;
[0011] a core shaft having an upper mounting hole for connecting to a vibration-damped device and a lower mounting hole for connecting to a locking screw, the core shaft being inserted into the cavity with one end portion of the upper mounting hole extending out of the cavity, and one end of the lower mounting hole having a stepped structure;
[0012] Partitions and spacers, wherein there are two partitions supported by spacers installed at the step structure of the core shaft, and the two partitions divide the cavity into an upper cavity and a lower cavity;
[0013] A locking screw, installed in the lower mounting hole of the core shaft, for locking the partition plate and the spacer sleeve;
[0014] A friction plate, the friction plate being arranged between two spacers outside the spacer, and a tension spring being arranged between the friction plate and the spacer;
[0015] Vibration isolation pads, there are two vibration isolation pads, which are respectively arranged in the upper cavity and the lower cavity.
[0016] In an optional embodiment of the present application, the lower shell is a cylindrical structure with an open side and a closed side. A flange is provided on the open side of the shell.
[0017] In an optional embodiment of the present application, the upper shell is a tubular structure with openings at both ends, and has flanges on both sides.
[0018] In an optional embodiment of the present application, the inner wall surface of the lower shell and the upper shell on the side where the upper shell and the lower shell are connected is provided with a curved surface.
[0019] In an optional embodiment of the present application, the cross-sectional area and height of the upper cavity are the same as those of the lower cavity.
[0020] In an optional embodiment of the present application, the vibration isolation pad is a metal mesh, metal rubber or rubber.
[0021] In an optional embodiment of the present application, the friction plate is a split structure, and an inner edge of the friction plate is provided with an annular groove for installing a tension spring.
[0022] In an optional embodiment of the present application, an adjustment gasket is further included, which is arranged in the upper cavity and located between the vibration isolation pad and the cover plate.
[0023] The present application has a simple structure and can return to its initial position after the load is unloaded, effectively solving the rebound hysteresis problem of mesh pads or other viscoelastic vibration isolation pads, improving the recovery ability of the vibration isolation buffer device during different load conversions, and improving the consistency of product performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.
[0025] Figure 1 This is a schematic diagram of the appearance of the vibration damping and buffering device of this application.
[0026] Figure 2 This is a cross-sectional view of the vibration damping and buffering device of this application.
[0027] Figure 3 This is a schematic diagram of the lower shell of this application.
[0028] Figure 4 This is a schematic diagram of the upper shell of this application.
[0029] Figure 5 This is a schematic diagram of the mandrel of this application.
[0030] Figure 6 This is an exploded view of the core shaft, partition, spacer and other structures of this application.
[0031] Reference numerals:
[0032] 100-Vibration Isolation Buffer Device
[0033] 11-lower shell, 111-flange, 112-arc surface
[0034] 12-Upper shell
[0035] 13-Cover
[0036] 14-Adjusting shims
[0037] 15-Connecting screws
[0038] 21-core shaft
[0039] 22-locking screw
[0040] 23-partition, 231-upper partition, 232-lower partition
[0041] 24-spacer
[0042] 25-Extension spring
[0043] 30-vibration isolation pad, 31-upper vibration isolation pad, 32-lower vibration isolation pad DETAILED DESCRIPTION
[0044] 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.
[0045] like Figures 1 to 6 As shown, the automatic reset vibration isolation and buffer device 100 provided in the present application includes: a lower shell 11, an upper shell 12, a cover plate 13, a core shaft 21, a locking screw 22, a partition 23, a spacer sleeve 24, a tension spring 25, a friction plate 26 and a vibration isolation pad 3.
[0046] like Figure 3 As shown, the lower shell 11 is a cylindrical structure with an open top and a closed bottom. Figure 4 As shown, the upper shell 12 is a tubular structure with openings on both the upper and lower sides. The lower shell 11 and the upper shell 12 are fixedly connected by a connector, and the upper shell 12 and the cover plate 13 are connected by the connector, forming a cavity within the lower shell 11, the upper shell 12 and the cover plate 13.
[0047] A through hole is provided in the middle of the cover plate 13 for the core shaft 21 to pass through. Four mounting holes can be provided around the cover plate 13 and the upper shell 12 for connecting to the vibration-damped equipment through connecting members such as bolts.
[0048] In some embodiments of the present application, the open side of the lower shell 11 has a radially extending flange 111, and the upper and lower sides of the upper shell 12 also have radially extending flanges. The upper and lower shells are fixed together by connecting screws 15 that pass through the flanges. In a preferred embodiment of the present application, the inner wall surface of the flange side of the lower shell 11 and the non-cover side of the upper shell 12 is provided with a curved surface 112.
[0049] like Figure 5 As shown, the core shaft 21 is generally a columnar structure, with an upper mounting hole 211 on one end surface and a lower mounting hole 212 on the other end surface. The upper mounting hole 211 is used to connect to the mounting base or mounting ear of the vibration-damped device, while the lower mounting hole 212 is used to install the locking screw 22. A step structure 213 is provided on one side of the lower mounting hole of the core shaft 21. The stepped structure 213 of the core shaft 21 is inserted into the cavity formed by the upper and lower shells, while the upper mounting hole of the core shaft 21 extends through the cover plate 13 of the cavity and connects to the vibration-damped device.
[0050] like Figure 6 As shown, there are two partitions 23—an upper partition 231 and a lower partition 232. The upper and lower partitions 231 and 232 are supported on the core shaft 21 via spacers 24 mounted on the stepped structure 213 of the core shaft 21. Locking screws 22 are installed in the lower mounting holes 212 to secure the partitions 23 and spacers 24. Both partitions 23 are positioned within the cavity, thereby dividing the cavity into an upper cavity and a lower cavity. In a preferred embodiment of the present application, the upper and lower cavities are generally of the same height and cross-section.
[0051] An expansion spring 25 is positioned outside the spacer 24, and a friction plate 26 is positioned between the spacer 24 and the walls of the upper and lower housings. The thickness of the friction plate 26 is equal to the distance between the two spacers 23. In some embodiments of the present application, the friction plate 26 is a split structure, with an annular groove on the side facing the spacer 24 for mounting the expansion spring 25.
[0052] There are two vibration isolation pads 3, namely an upper vibration isolation pad 31 and a lower vibration isolation pad 32. The two vibration isolation pads 3 are respectively arranged in the upper cavity and the lower cavity, and are completely symmetrical in structure, which can achieve complete symmetry when installed upright or inverted. In some embodiments of the present application, the vibration isolation pads 3 are vibration isolation structures such as metal mesh, metal rubber, or rubber.
[0053] In addition, the vibration isolation and buffering device of the present application further includes an adjustment gasket 14, which is arranged between the upper vibration isolation pad 32 in the upper cavity and the cover plate 13, and is used to adjust the tightness of the vibration isolation pad 3 in the upper and lower cavities.
[0054] The working process of the vibration isolation and buffering device 100 of the present application is as follows:
[0055] 1) When the vibration isolation buffer moves upward or downward:
[0056] As the upward or downward displacement increases, the friction plate 26 of the vibration isolation and buffering device 100 and the arc surface 112 of the upper shell 12 and the lower shell 11 form a friction stiffness adaptive unit, the friction force increases, the dynamic stiffness increases, and the impact load can be effectively attenuated, achieving the effect of impact attenuation under small displacement;
[0057] When the displacement increases to a certain amount, the vibration isolation and buffering device 100 and the arc surface 112 of the upper shell 12 and the lower shell 11 form a limiting self-locking structure, which can play a certain role in suppressing the angular displacement;
[0058] When the load is unloaded, the vibration isolation and buffer device 100 can return to its starting position along the arc surface 112 of the lower shell 11 to ensure the initial state of the vibration isolation and buffer device, thereby ensuring the consistency of the static and dynamic performance of the vibration isolation and buffer device.
[0059] 2) When the vibration isolation and buffer device moves to the left or right:
[0060] The core shaft 21 of the vibration isolation and buffer device 100 drives the friction plate 26 to tilt, generating friction with the arc surface 112 of the upper shell 12 and the lower shell 11 to form stiffness and damping. When the load is unloaded, the vibration isolation and buffer device 100 returns to its initial position through the arc surface 112 of the lower shell 11.
[0061] The automatic reset vibration isolation and buffer device of the present application is different from the conventional shock absorber installation method. It effectively reduces the change in system height after the vibration isolation and buffer device are installed by changing the installation position, and effectively reduces the problem of excessive elastic center caused by installation problems.
[0062] The vibration isolation and buffer device of the present application adopts a friction plate mechanism when moving upward, downward, left and right. Its functional mechanism is consistent and its performance tends to be consistent through design, so that the vibration isolation and buffer device can be implemented in upright, inverted and side-mounted environments.
[0063] The present application has a simple structure and can return to its initial position after the load is unloaded, effectively solving the problem of rebound hysteresis of vibration isolation pads made of mesh pads or other viscoelastic materials, improving the recovery ability of the vibration isolation and buffering device during different load conversions, and improving the consistency of product performance. It is particularly suitable for fields such as airborne and optoelectronic pods that require high consistency of product performance under multiple working conditions. Secondly, the arc surface of the lower shell 11 in the present application can form a stiffness and damping adaptive unit. As the motion displacement increases (or the load increases), the dynamic stiffness and damping increase, which can effectively attenuate the impact load in a small space. At the same time, it can also form a limit interlock and suppress angular displacement functions, which is particularly suitable for use in the vibration isolation and buffering fields of airborne equipment and optoelectronic pods. In addition, the vibration isolation and buffering device of the present application has the same functional mechanism under the upper, lower, left and right working conditions, and can be applied to upright, inverted and side-mounted environments. Finally, by changing the installation position, the change in system height after the vibration isolation and buffering device is installed is effectively reduced, effectively reducing the problem of excessive elastic center caused by installation problems.
[0064] The vibration isolation and buffering device of the present application effectively solves the vibration isolation and buffering requirements of weapons and equipment in the field of airborne equipment under different navigation attitudes (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. By adopting an automatic reset device in conjunction with the curved surface design of the outer shell, the problem of the difficulty in axial and radial reset of the vibration isolation buffer after a large load is effectively solved, so that the vibration isolation buffer can quickly return to the initial design position after the large load is unloaded, ensuring that the vibration isolation buffer is in the initial position after the load is unloaded, and ensuring the static and dynamic mechanical properties of the vibration isolation and buffering device. Moreover, the upright and inverted installation of the vibration isolation device of the present application are completely consistent, which effectively solves the problem of inconsistency between upright and inverted installation of traditional vibration isolators. The outer shell curved surface is used in conjunction with the friction plate structure to increase the damping and dynamic stiffness of the vibration isolation and buffering device under large displacement in a way to increase the damping, which can have a certain inhibitory effect on vibration and impact, and at the same time also play a controlling role on the angular displacement that is more sensitive to optoelectronic pod equipment.
[0065] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. An automatic reset vibration isolation buffer device, characterized in that: include: A lower shell, an upper shell and a cover plate, wherein the lower shell, the upper shell and the cover plate are connected to form a cavity; a core shaft having an upper mounting hole for connecting to a vibration-damped device and a lower mounting hole for connecting to a locking screw, the core shaft being inserted into the cavity with one end portion of the upper mounting hole extending out of the cavity, and one end of the lower mounting hole having a stepped structure; Partitions and spacers, wherein there are two partitions supported by spacers installed at the step structure of the core shaft, and the two partitions divide the cavity into an upper cavity and a lower cavity; A locking screw, installed in the lower mounting hole of the core shaft, for locking the partition plate and the spacer sleeve; A friction plate, the friction plate being arranged between two spacers outside the spacer, and a tension spring being arranged between the friction plate and the spacer; Vibration isolation pads, there are two vibration isolation pads, which are respectively arranged in the upper cavity and the lower cavity.
2. The automatic reset vibration isolation buffer device according to claim 1, characterized in that: The lower shell is a cylindrical structure with an opening on one side and a closed structure on the other side. A flange is provided on the open side of the shell.
3. The automatic reset vibration isolation buffer device according to claim 1, characterized in that: The upper shell is a tubular structure with two ends open, and has flanges on both sides.
4. The automatic reset vibration isolation buffer device according to claim 2 or 3, characterized in that: The inner wall surfaces of the lower shell and the upper shell at the side where the upper shell and the lower shell are connected are provided with an arc surface.
5. The automatic reset vibration isolation buffer device according to claim 1, characterized in that: The upper cavity and the lower cavity have the same cross-sectional area and height.
6. The automatic reset vibration isolation buffer device according to claim 5, characterized in that: The vibration isolation pad is made of metal mesh, metal rubber or rubber.
7. The automatic reset vibration isolation buffer device according to claim 1, characterized in that: The friction plate is a split structure, and an annular groove is provided on the inner edge of the friction plate for installing a tension spring.
8. The automatic reset vibration isolation buffer device according to claim 1, characterized in that: It also includes an adjustment gasket, which is arranged in the upper cavity and located between the vibration isolation pad and the cover plate.