Airborne equipment back vibration isolator

Abstract

The airborne equipment back vibration isolator comprises a mounting beam, a center shaft and a knuckle bearing, the two ends of the center shaft vertically penetrate through the upper end and the lower end of the mounting beam correspondingly and then are coaxially and fixedly connected with two viscoelastic damping blocks correspondingly, and the two viscoelastic damping blocks are fixed to the upper end and the lower end of the mounting beam correspondingly in a limiting mode; one end of the knuckle bearing is arranged on the center shaft in a sleeving mode, the other end of the knuckle bearing is horizontally and fixedly connected with a first shell and an axial damping piece located in the first shell, and the end, away from the knuckle bearing, of the first shell is fixedly connected with an end cover. The end, away from the knuckle bearing, of the axial damping piece is fixedly connected with a connecting shaft, one end of the connecting shaft penetrates through the end cover and then is connected with airborne equipment, a first conical spring connected to the axial damping piece in a sleeving mode is arranged between the end of the connecting shaft and the knuckle bearing, and a second conical spring connected to the connecting shaft in a sleeving mode is arranged between the end of the connecting shaft and the end cover. The vibration isolator can resist impact and effectively prevent the vibration isolator from being broken.

Description

Technical Field

[0001] This invention belongs to the technical field of back vibration isolators, and particularly relates to a back vibration isolator for airborne equipment. Background Technology

[0002] Avionics equipment (airborne equipment) is subjected to severe vibrations and shocks during use. Currently, to ensure the long-term reliable operation of airborne equipment, vibration isolators are generally used to reduce the vibrations and shocks experienced by the equipment. For airborne equipment with large dimensions, in addition to bottom vibration isolators, back vibration isolators are also required to ensure the normal operation of the airborne equipment under overturning moments, vibrations, and shocks.

[0003] Currently, the back-mounted vibration isolators commonly used in airborne equipment primarily serve to prevent overturning, offering relatively weak protection against horizontal vibrations and impacts. Specifically, in the horizontal installation direction perpendicular to the back-mounted vibration isolator, existing back-mounted vibration isolators have a short stroke and mainly rely on the deformation of damping materials to achieve vibration isolation. However, when the airborne equipment is at a high height, the displacement at the top of the equipment is significant, and the magnitude of vibration and impact is substantial, posing a significant risk of fracture to the mounting shaft. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a vibration isolator for the back of airborne equipment that is shock-resistant and fracture-proof.

[0005] The objective of this invention is achieved through the following technical solution: A vibration isolator on the back of an airborne device includes a mounting beam and a central shaft. The two ends of the central shaft pass vertically through the upper and lower ends of the mounting beam, respectively, and are coaxially fixedly connected to two viscoelastic damping blocks. The upper and lower ends of the mounting beam limit and fix the two viscoelastic damping blocks. It also includes a spherical bearing, one end of which is sleeved on a central shaft, and the other end of which is horizontally fixedly connected to a first housing and an axial damping element located inside the first housing. An end cap is fixedly connected to the end of the first housing away from the spherical bearing, and a connecting shaft for connecting airborne equipment is fixedly connected to the end of the axial damping element away from the spherical bearing, which passes through the end cap. A first conical spring sleeved on the axial damping element is provided between the end of the connecting shaft and the spherical bearing, and a second conical spring sleeved on the connecting shaft is provided between the end of the connecting shaft and the end cap. The viscoelastic damping block is a damping rubber block, and the axial damping element is a miniature damper.

[0006] The beneficial effects of adopting the above technical solution are as follows: On the one hand, the airborne equipment back vibration isolator combines three methods—rubber damping blocks, micro dampers, and conical springs—to improve the back vibration isolator's ability to resist external impacts and vibrations; on the other hand, the use of conical springs and micro dampers in the airborne equipment back vibration isolator can increase the horizontal travel of the back vibration isolator; combining these two aspects, the airborne equipment back vibration isolator can resist impacts and effectively prevent the vibration isolator from breaking.

[0007] Furthermore, limit blocks are provided at both the upper and lower ends of the mounting beam, and viscoelastic damping blocks are embedded in the limit blocks; a second housing for restricting the axial movement, radial movement and rotation around the axis of the limit blocks can be detachably connected to both the upper and lower ends of the mounting beam.

[0008] Furthermore, the limiting block is provided with a first limiting hole along the axial direction, and the cross-sectional shape of the viscoelastic damping block is non-circular. The cross-sectional dimensions of the first limiting hole match the cross-sectional dimensions of the viscoelastic damping block.

[0009] Furthermore, a number of toothed blocks are provided outside the viscoelastic damping block, and a number of toothed grooves are provided in the first limiting hole to mesh with the toothed blocks respectively.

[0010] The beneficial effects of adopting the above technical solution are as follows: This arrangement allows a gear-shaped limit to be formed between the viscoelastic damping block (such as the damping rubber block) and the limiting block, thereby increasing damping and improving impact resistance.

[0011] Furthermore, the depth of the first limiting hole is greater than the height of the viscoelastic damping block.

[0012] The beneficial effect of adopting the above technical solution is that this setting provides a deformation margin for the viscoelastic damping block such as the damping rubber block.

[0013] Furthermore, a second limiting hole is provided at one end of the second housing, and the two ends of the limiting block are respectively attached to one end face of the mounting beam and the bottom of the second limiting hole. The outer wall of the limiting block is attached to the wall of the second limiting hole, and the outer contour shape of the cross-section of the limiting block is non-circular.

[0014] Furthermore, the viscoelastic damping block is vulcanized on the central axis.

[0015] Furthermore, the axis of the other end of the spherical bearing, the axis of the axial damping element, and the axis of the connecting shaft all coincide. Furthermore, a threaded hole is coaxially provided at the end of the connecting shaft away from the axial damping component.

[0016] The beneficial effects of this invention are as follows: On the one hand, the airborne equipment back vibration isolator combines three methods—rubber damping blocks, micro dampers, and conical springs—to improve its ability to resist external impacts and vibrations. On the other hand, the use of conical springs and micro dampers in the airborne equipment back vibration isolator can increase its horizontal travel. Combining these two aspects, the airborne equipment back vibration isolator can resist impacts and effectively prevent the isolator from breaking. Attached Figure Description

[0017] The invention will now be described in more detail with reference to embodiments and the accompanying drawings. Figure 1 A schematic diagram of the structure of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the present invention is shown; Figure 3 This shows an installation diagram of the limiting block in this invention; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0018] Figure label: 1. Central shaft; 2. Mounting beam; 3. Viscoelastic damping block; 4. Limiting block; 5. Second housing; 6. First conical spring; 7. Axial damping component; 8. End cap; 9. Spherical bearing; 10. Connecting shaft; 1001. Threaded hole; 11. First housing; 12. Second conical spring. Detailed Implementation

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] This invention provides a back vibration isolator for airborne equipment, such as... Figure 1-3 As shown, it includes a mounting beam 2 and a central shaft 1. The two ends of the central shaft 1 pass vertically through the upper and lower ends of the mounting beam 2, respectively, and are coaxially fixedly connected to two viscoelastic damping blocks 3. The upper and lower ends of the mounting beam 2 are respectively limited and fixed to the two viscoelastic damping blocks 3. It also includes a spherical bearing 9, one end of which is sleeved on the central shaft 1. The other end of the spherical bearing 9 is horizontally fixedly connected to a first housing 11 and an axial damping element 7 located inside the first housing 11. An end cap 8 is fixedly connected to the end of the first housing 11 away from the spherical bearing 9. A connecting shaft 10 for connecting airborne equipment after passing through the end cap 8 is fixedly connected to the end of the axial damping element 7 away from the spherical bearing 9. A first conical spring 6 sleeved on the axial damping element 7 is provided between the end of the connecting shaft 10 and the spherical bearing 9. A second conical spring 12 sleeved on the connecting shaft 10 is provided between the end of the connecting shaft 10 and the end cap 8. The viscoelastic damping block 3 is a damping rubber block, and the axial damping element 7 is a miniature damper. Understandably, on the one hand, the airborne equipment back vibration isolator combines three methods—rubber damping blocks, micro dampers, and conical springs—to improve its ability to resist external impacts and vibrations; on the other hand, the use of conical springs and micro dampers in the airborne equipment back vibration isolator can increase its horizontal travel. Combining these two aspects, the airborne equipment back vibration isolator can resist impacts and effectively prevent the isolator from breaking.

[0021] It should be noted that the spherical bearing 9 is mounted on the central shaft 1. The spherical bearing 9 can rotate around the axis of the central shaft 1 or slide along the axial direction of the central shaft 1. In addition, the deformation of the first conical spring 6 and the second conical spring 12 can reduce external impacts and vibrations.

[0022] In addition, limit blocks 4 are provided at both the upper and lower ends of the mounting beam 2, and viscoelastic damping blocks 3 are embedded in the limit blocks 4; the upper and lower ends of the mounting beam 2 are screwed together with a second housing 5 for limiting the axial movement, radial movement and rotation around the axis of the limit blocks 4.

[0023] It should be noted that the two ends of the central shaft 1 pass through the two holes at the upper and lower ends of the mounting beam 2 respectively, and the damping rubber block is tightly fitted on both ends of the central shaft 1 and embedded in the limiting block 4; the second housing 5 is fastened to the limiting block 4 and fixed to the mounting beam 2 by screws; the two ends of the central shaft 1 are stepped shafts so as to use the second housing 5, the limiting block 4 and the damping rubber block to limit the vertical displacement of the central shaft 1.

[0024] In one embodiment, the limiting block 4 is provided with a first limiting hole along the axial direction, and the cross-sectional shape of the viscoelastic damping block 3 is non-circular, with the cross-sectional dimensions of the first limiting hole matching the cross-sectional dimensions of the viscoelastic damping block 3.

[0025] In one embodiment, such as Figure 3 As shown, a number of toothed blocks are provided outside the viscoelastic damping block 3, and a number of toothed grooves are provided in the first limiting hole to mesh with the toothed blocks respectively.

[0026] It should be noted that a gear-type limit is set between the viscoelastic damping block 3 and the limiting block 4 to increase damping and thus improve impact resistance.

[0027] In one embodiment, the depth of the first limiting hole is greater than the height of the viscoelastic damping block 3.

[0028] Understandably, this configuration provides a deformation margin for the viscoelastic damping block 3, such as the damping rubber block.

[0029] In one embodiment, a second limiting hole is provided at one end of the second housing 5, and the two ends of the limiting block 4 are respectively attached to one end face of the mounting beam 2 and the bottom of the second limiting hole. The outer wall of the limiting block 4 is attached to the wall of the second limiting hole, and the outer contour shape of the cross-section of the limiting block 4 is non-circular.

[0030] In one embodiment, the viscoelastic damping block 3 is vulcanized on the central shaft 1.

[0031] It should be noted that, in order to improve the connection stability between the viscoelastic damping block 3 and the central shaft 1, the cross-sectional shape of the inner hole of the viscoelastic damping block 3 can be non-circular. Correspondingly, the outer contour shape of the cross-section of the central shaft 1 used to connect the viscoelastic damping block 3 is also matched to be non-circular.

[0032] In one embodiment, the axis of the other end of the spherical bearing 9, the axis of the axial damper 7, and the axis of the connecting shaft 10 all coincide.

[0033] In one embodiment, the end of the connecting shaft 10 away from the axial damping member 7 is coaxially provided with a threaded hole 1001.

[0034] In summary, this airborne equipment back vibration isolator combines three methods—rubber damping blocks, micro-dampers, and conical springs—to improve its ability to resist external impacts and vibrations. Furthermore, the use of conical springs and micro-dampers increases the horizontal travel of the back vibration isolator. In other words, this airborne equipment back vibration isolator can resist impacts and effectively prevent breakage.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A vibration isolator on the back of an airborne device, characterized in that, It includes a mounting beam (2) and a central shaft (1). The two ends of the central shaft (1) pass vertically through the upper and lower ends of the mounting beam (2) and are respectively coaxially fixedly connected to two viscoelastic damping blocks (3). The upper and lower ends of the mounting beam (2) respectively limit and fix the two viscoelastic damping blocks (3). It also includes a spherical bearing (9), one end of which is sleeved on the central shaft (1), and the other end of which is horizontally fixedly connected to a first housing (11) and an axial damping member (7) located inside the first housing (11). An end cap (8) is fixedly connected to the end of the first housing (11) away from the spherical bearing (9). A connecting shaft (10) for connecting airborne equipment after passing through the end cap (8) is fixedly connected to the end of the axial damping member (7) away from the spherical bearing (9). A first conical spring (6) sleeved on the axial damping member (7) is provided between the end of the connecting shaft (10) and the spherical bearing (9). A second conical spring (12) sleeved on the connecting shaft (10) is provided between the end of the connecting shaft (10) and the end cap (8).

2. The airborne equipment back vibration isolator according to claim 1, characterized in that, The viscoelastic damping block (3) is a damping rubber block, and the axial damping component (7) is a micro damper.

3. A back vibration isolator for airborne equipment according to claim 1 or 2, characterized in that, The upper and lower ends of the mounting beam (2) are provided with limit blocks (4), and the viscoelastic damping block (3) is embedded in the limit block (4); the upper and lower ends of the mounting beam (2) are detachably connected with a second housing (5) for restricting the axial movement, radial movement and rotation around the axis of the limit block (4).

4. The airborne equipment back vibration isolator according to claim 3, characterized in that, The limiting block (4) is provided with a first limiting hole along the axial direction. The cross-sectional shape of the viscoelastic damping block (3) is non-circular. The cross-sectional size of the first limiting hole matches the cross-sectional size of the viscoelastic damping block (3).

5. A vibration isolator for the back of airborne equipment according to claim 4, characterized in that, The viscoelastic damping block (3) is provided with several toothed blocks on its outside, and the first limiting hole is provided with several toothed grooves that mesh with the several toothed blocks respectively.

6. A vibration isolator for the back of airborne equipment according to claim 4, characterized in that, The depth of the first limiting hole is greater than the height of the viscoelastic damping block (3).

7. A vibration isolator for the back of airborne equipment according to claim 3, characterized in that, The second housing (5) has a second limiting hole at one end. The two ends of the limiting block (4) are respectively attached to one end face of the mounting beam (2) and the bottom of the second limiting hole. The outer wall of the limiting block (4) is attached to the wall of the second limiting hole. The outer contour of the cross-section of the limiting block (4) is non-circular.

8. A back vibration isolator for airborne equipment according to claim 1 or 2, characterized in that, The viscoelastic damping block (3) is vulcanized on the central shaft (1).

9. A back vibration isolator for airborne equipment according to claim 1 or 2, characterized in that, The axis of the other end of the spherical bearing (9), the axis of the axial damping member (7), and the axis of the connecting shaft (10) all coincide.

10. A back vibration isolator for airborne equipment according to claim 9, characterized in that, The end of the connecting shaft (10) away from the axial damping member (7) is coaxially provided with a threaded hole (1001).

Images