Stiffness-damping-adjustable joint bearing type backrest vibration isolator

Abstract

The utility model relates to a kind of stiffness damping adjustable joint bearing type back frame vibration isolator, including groove support, center shaft and elastic damping vibration isolation component, the elastic damping vibration isolation component includes bearing cylinder, joint bearing is installed in the bearing cylinder;Connecting cylinder, it is sleeved in the outside of bearing cylinder, the connecting cylinder upper end is equipped with the detachable structure's cylinder mouth structure;Metal rubber, the metal rubber is loaded into connecting cylinder from connecting cylinder upper end cylinder mouth;Upper butterfly spring and lower butterfly spring, the upper butterfly spring and lower butterfly spring are respectively arranged in the upper and lower ends of bearing cylinder. By opening cylinder cover, according to different electronic equipment, the metal rubber of required density can be loaded into connecting cylinder, realize that the stiffness of vibration isolator is adjustable, and promote the compatibility of vibration isolator.

Description

Technical Field

[0001] This utility model relates to the field of vibration isolation and buffering technology for electronic equipment, specifically to a stiffness-damping adjustable spherical bearing type back frame vibration isolator. Background Technology

[0002] With the continuous development of modern military equipment, the working environment of electronic equipment is becoming increasingly harsh. In order to enable electronic equipment to better adapt to the harsh mechanical environment, higher requirements are placed on the vibration isolation and buffering system of electronic equipment.

[0003] Vibration isolation theory shows that when electronic equipment is subjected to mechanical environments such as vibration and impact of different intensities, the vertical vibration and impact are mainly borne by the bottom vibration isolator in the vibration isolation system, while the horizontal vibration, impact or centrifugal acceleration requires the back frame vibration isolator to play a vibration isolation and buffering role to improve the stability of the operation of electronic equipment.

[0004] In order to suppress harmful coupled vibrations of the back frame isolator and improve the vibration isolation efficiency, the stiffness and damping characteristics of the back frame isolator must be adjustable to adapt to different electronic devices and form a low-coupling and high-stability vibration isolation system. This ensures that its vertical stiffness and vertical damping are zero, and its horizontal stiffness and horizontal damping can be adjusted and matched with the bottom isolator. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a stiffness-damping adjustable spherical bearing type back frame vibration isolator, which solves the technical problem that the stiffness and damping characteristics of the previous back frame vibration isolator were inconvenient to adjust, resulting in low compatibility between the back frame vibration isolator and different electronic equipment.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A stiffness-adjustable damping spherical bearing type back-frame vibration isolator is provided, comprising a grooved bracket, a central shaft, and an elastic damping vibration isolator component, wherein the elastic damping vibration isolator component includes... A bearing sleeve, wherein a spherical bearing is installed inside the bearing sleeve, and the central shaft passes through the spherical bearing; A connecting cylinder is sleeved on the outside of the bearing cylinder and has a lateral buffer space between it and the bearing cylinder. The upper end of the connecting cylinder is provided with a detachable cylinder opening structure. Metal rubber, which is inserted into the connecting cylinder from the upper end of the connecting cylinder and disposed between the inner side of the connecting cylinder and the outer side wall of the bearing cylinder; An upper butterfly spring and a lower butterfly spring are respectively disposed at the upper and lower ends of the bearing cylinder so that the bearing cylinder abuts against the vertical middle position inside the connecting cylinder.

[0007] Furthermore, the connecting cylinder includes A first cylindrical body, wherein a cylinder opening is provided at the upper end of the cylindrical body; The cylinder cover is connected to the opening of the first cylinder by a thread.

[0008] Furthermore, the bearing sleeve includes The second cylinder has an opening at its upper end; The bearing end sleeve is threadedly connected to the opening of the second cylinder.

[0009] Furthermore, the upper and lower ends of the spherical plain bearing are respectively provided with an upper friction cone ring and a lower friction cone ring. The spherical plain bearing abuts against the bearing end sleeve via the upper friction cone ring, and the spherical plain bearing abuts against the inner bottom surface of the bearing cylinder via the lower friction cone ring.

[0010] Furthermore, the central shaft is disposed within the grooved bracket; The upper locking screw passes through the slotted bracket and connects to the upper end of the central shaft, while the lower locking screw passes through the slotted bracket and connects to the lower end of the central shaft.

[0011] The beneficial effects of this utility model are: This utility model relates to a stiffness-damping adjustable spherical bearing type back frame vibration isolator. By opening the cylinder cover, metal rubber of the required density can be inserted into the connecting cylinder according to different electronic devices, thereby achieving adjustable stiffness of the vibration isolator and improving its adaptability.

[0012] The magnitude of the horizontal damping force can be adjusted by changing the screw-in depth of the cap, thereby altering the normal pressure on the contact surface between the friction cone ring and the connecting cylinder.

[0013] Zero triaxial torsional stiffness is achieved by using a joint bearing connection structure.

[0014] When electronic equipment is subjected to vibration, impact, or centrifugal acceleration, the force causes the metal rubber to deform and the disc spring inside the isolator to displace, thereby dissipating the energy of vibration and impact and reducing the vibration or impact acceleration value transmitted to the electronic equipment through the connecting screw, thus effectively protecting the electronic equipment. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the stiffness-damping adjustable spherical bearing type back frame vibration isolator of this utility model. Figure 2 This is a top view of the stiffness-damping adjustable spherical bearing type back frame vibration isolator of this utility model. Figure 3 This is a schematic diagram of an elastic damping vibration isolation component; Figure 4This is a schematic diagram of the connecting cylinder; Figure 5 This is a structural diagram of the metal rubber and the bearing sleeve; Figure 6 This is a structural diagram of the bearing sleeve and the two friction cone rings; Figure 7 This is a structural diagram of the spherical bearing and the two friction cone rings; Among them, 1. slotted bracket, 10. central shaft, 11. upper locking screw, 12. lower locking screw, 13. connecting screw, 14. upper conical spring, 15. lower conical spring; 2. Connecting cylinder; 21. First cylinder body; 22. Cylinder cover; 3. Bearing sleeve; 31. Second cylinder; 32. Bearing end sleeve; 4. Metal-rubber; 5. Spherical plain bearing; 61. Upper friction cone ring; 62. Lower friction cone ring; 71. Upper butterfly spring; 72. Lower butterfly spring. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] This application provides a stiffness-damping adjustable spherical bearing type back frame vibration isolator, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0019] To address the technical problem in existing technologies where the stiffness and damping characteristics of back-frame vibration isolators are inconvenient to adjust, resulting in low compatibility between back-frame vibration isolators and different electronic devices, one embodiment of this application provides a stiffness-damping adjustable spherical bearing type 5 back-frame vibration isolator. This will be described in detail below.

[0020] like Figures 1 to 7 As shown, a stiffness-damping adjustable spherical bearing type back frame vibration isolator includes a grooved bracket 1, a central shaft 10, and an elastic damping vibration isolation component. The grooved bracket 1 has a U-shaped structure. The central shaft 10 is installed inside the grooved bracket 1. The elastic damping vibration isolation component is set on the central shaft 10. An upper conical spring 14 and a lower conical spring 15 are set on the central shaft 10. The upper conical spring 14 and the lower conical spring 15 respectively abut against the upper and lower ends of the elastic damping vibration isolation component.

[0021] In this embodiment, the small-diameter end of the upper conical spring 14 abuts against the upper end of the grooved bracket 1, and the large-diameter end of the upper conical spring 14 abuts against the upper end of the elastic damping vibration isolation component. The small-diameter end of the lower conical spring 15 abuts against the lower end of the grooved bracket 1, and the large-diameter end of the lower conical spring 15 abuts against the lower end of the elastic damping vibration isolation component.

[0022] like Figure 3 As shown, the elastic damping vibration isolation component includes A bearing sleeve 3, in which a spherical bearing 5 is installed, and the central shaft 10 passes through the spherical bearing 5; The connecting cylinder 2 is sleeved on the outside of the bearing cylinder 3 and has a lateral buffer space between it and the bearing cylinder 3. The upper end of the connecting cylinder 2 is provided with a detachable cylinder opening structure. Metal rubber 4 is inserted into the connecting cylinder 2 from the upper end of the connecting cylinder 2 and is disposed between the inner side of the connecting cylinder 2 and the outer side wall of the bearing cylinder 3. Upper butterfly spring 71 and lower butterfly spring 72 are respectively disposed at the upper and lower ends of the bearing cylinder 3 so that the bearing cylinder 3 abuts against the vertical middle position inside the connecting cylinder 2.

[0023] Specifically, as an optional implementation method in this embodiment, such as Figure 3 and Figure 4 As shown, the connecting cylinder 2 includes The first cylindrical body 21 has an opening at its upper end; The cylinder cover 22 is connected to the opening of the first cylinder 21 by a thread.

[0024] Specifically, the cylinder opening is provided with an internal thread section, and the cylinder cover 22 is provided with an external thread. The length of the internal thread section is greater than the thickness of the cylinder cover 22, so that the cylinder cover 22 has an adjustment distance on the connecting cylinder 2. The damping is adjusted by changing the magnitude of the normal pressure on the contact surface by adjusting the screw depth of the cylinder cover 22.

[0025] Specifically, the lower end of the first cylinder 21 and the upper end of the cylinder cover 22 are respectively provided with positioning steps. The positioning steps are used to cooperate with the conical spring to prevent the conical spring from moving.

[0026] The magnitude of the positive pressure between the upper butterfly spring 71 and the cylinder cover 22, and between the lower butterfly spring 72 and the first cylinder 21, can be adjusted by tightening or loosening the cylinder cover 22. This allows the magnitude of the damping force to be adjusted according to the magnitude of the friction force, and the damping force value set for the vibration environment can be repeatedly adjusted.

[0027] Specifically, as an optional implementation method in this embodiment, such as Figure 5 , Figure 6 as well as Figure 7As shown, the upper friction cone ring 61 and the lower friction cone ring 62 are respectively provided at the upper and lower ends of the spherical bearing 5. The spherical bearing 5 abuts against the bearing end sleeve 32 via the upper friction cone ring 61, and the spherical bearing 5 abuts against the inner bottom surface of the bearing cylinder 3 via the lower friction cone ring 62.

[0028] Specifically, as an optional implementation method in this embodiment, such as Figure 3 and Figure 6 As shown, the bearing sleeve 3 includes The second cylinder 31 has an opening at its upper end; The bearing end sleeve 32 is threadedly connected to the opening of the second cylinder 31.

[0029] Similarly, the opening of the second cylinder 31 is also provided with an internal thread section, and the bearing end sleeve 32 is provided with an external thread. The length of the internal thread section is greater than the thickness of the bearing end sleeve 32, so that the bearing end sleeve 32 has an adjustment distance on the bearing cylinder 3. By adjusting the screwing depth of the bearing end sleeve 32, the gap between the upper and lower friction cone rings and the spherical bearing 5 is controlled, the spherical bearing 5 is kept horizontal, and it is ensured that it slides freely up and down on the central axis 10 with zero vertical stiffness.

[0030] like Figure 7 As shown, the spherical bearing 5 includes an inner ring and an outer ring. The inner ring has a spherical surface, and the upper friction cone ring 61 and the lower friction cone ring 62 are respectively fitted with the inner ring.

[0031] Specifically, the lower end of the second cylinder 31 and the upper end of the bearing end sleeve 32 are respectively provided with positioning steps. The positioning steps are used to cooperate with the friction cone ring to prevent the friction cone ring from moving.

[0032] Specifically, as an optional implementation method in this embodiment, such as Figure 1 and Figure 2 As shown, the central shaft 10 is disposed within the grooved bracket 1; The upper locking screw 11 passes through the slotted bracket 1 and is connected to the upper end of the central shaft 10, while the lower locking screw 12 passes through the slotted bracket 1 and is connected to the lower end of the central shaft 10.

[0033] Specifically, the locking screw passes through the spring washer and flat washer in sequence and then connects to the central shaft 10.

[0034] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 4 As shown, a connecting screw 13 is installed on the side wall of the connecting cylinder 2. The installation structure is as follows: a threaded connection hole is opened on the side wall of the connecting cylinder 2, the connecting screw 13 is first screwed into the threaded connection hole, and then the bottom end of the connecting screw 13 is welded to the connecting cylinder 2, and then polished. The purpose is to increase its connection strength and make the connection between the vibration isolator and electronic equipment more reliable.

[0035] In this embodiment, the metal rubber 4 is a mesh pad made of stainless steel wire mesh. During the vibration isolation and buffering process, the vibration isolator will drive the joint bearing 5 to move, causing the position space of the bearing sleeve inside the vibration isolator to change. This dynamic displacement process will eventually change the bulk density of the metal rubber 4, thereby realizing the adjustable change of horizontal stiffness.

[0036] The cap 22 is connected to the first cylinder 21 by a thread. The cap 22 is easy to open, which makes it easy to replace the internal metal rubber 4. By changing the diameter of the stainless steel wire mesh, the number of weaves, the heat treatment hardness, and the tightness during pressing, metal rubber 4 with different bulk densities can be formed, thus obtaining different initial horizontal stiffness under the same filling space.

[0037] During the use of the vibration isolator, when the electronic equipment is subjected to vibration, impact or centrifugal acceleration, the force causes the metal rubber 4 to deform and the disc spring inside the vibration isolator to displace, thereby dissipating the energy of vibration and impact, reducing the vibration or impact acceleration value transmitted to the electronic equipment through the connecting screw 13, and thus effectively protecting the electronic equipment.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A stiffness-damping adjustable spherical bearing type back-frame vibration isolator, comprising a slotted bracket (1), a central shaft (10), and elastic damping vibration isolating components, characterized in that, The elastic damping vibration isolation component includes A bearing sleeve (3) is provided, in which a spherical bearing (5) is installed, and the central shaft (10) passes through the spherical bearing (5). The connecting cylinder (2) is sleeved on the outside of the bearing cylinder (3) and has a lateral buffer space between it and the bearing cylinder (3). The upper end of the connecting cylinder (2) is provided with a detachable cylinder opening structure. Metal rubber (4), the metal rubber (4) is inserted into the connecting cylinder (2) from the upper end of the connecting cylinder (2) and is disposed between the inner side of the connecting cylinder (2) and the outer side wall of the bearing cylinder (3); Upper butterfly spring (71) and lower butterfly spring (72) are respectively set at the upper and lower ends of the bearing cylinder (3) so that the bearing cylinder (3) abuts against the vertical middle position inside the connecting cylinder (2).

2. The stiffness-damping adjustable spherical bearing type back frame vibration isolator according to claim 1, characterized in that, The connecting cylinder (2) includes The first cylindrical body (21) has an opening at its upper end; The cylinder cover (22) is threadedly connected to the opening of the first cylinder (21).

3. The stiffness-damping adjustable spherical bearing type back frame vibration isolator according to claim 1, characterized in that, The bearing sleeve (3) includes The second cylinder (31) has an opening at its upper end; The bearing end sleeve (32) is threadedly connected to the opening of the second cylinder (31).

4. The stiffness-damping adjustable spherical bearing type back frame vibration isolator according to claim 3, characterized in that, The upper and lower ends of the spherical bearing (5) are respectively provided with an upper friction cone ring (61) and a lower friction cone ring (62). The spherical bearing (5) abuts against the bearing end sleeve (32) via the upper friction cone ring (61) and the spherical bearing (5) abuts against the inner bottom surface of the bearing cylinder (3) via the lower friction cone ring (62).

5. The stiffness-damping adjustable spherical bearing type back frame vibration isolator according to claim 1, characterized in that, The central shaft (10) is set inside the grooved bracket (1); The upper locking screw passes through the slotted bracket (1) and is connected to the upper end of the central shaft (10), while the lower locking screw passes through the slotted bracket (1) and is connected to the lower end of the central shaft (10).

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