Composite shock isolation device applied to large bearing explosive bolt

Abstract

The application relates to a composite shock isolation device applied to a large-load explosion bolt, which comprises a large-load explosion bolt assembly and a composite shock isolation device; the large-load explosion bolt comprises a bolt head, a separation screw rod, a collecting box and a loading nut, the bolt head is connected with the separation screw rod; a through hole is arranged at the bottom of the collecting box, the separation screw rod penetrates through the through hole, and the loading nut is located in the collecting box; the composite shock isolation device is placed in the collecting box, and the composite shock isolation device comprises a lower panel, an upper panel, an Euler beam, a wedge-shaped block, a shearing rubber assembly, a buffer and a wedge-shaped block collecting cylinder; the lower panel is pressed on the loading surface of the loading nut through the stud section of the loading nut, and the wedge-shaped block is installed at the end of the separation screw rod; the two ends of the Euler beam are respectively connected with the upper panel and the lower panel, one end of the wedge-shaped block collecting cylinder is connected with the wedge-shaped block, and the other end is connected with the upper panel; the shearing rubber assembly is located in the wedge-shaped block collecting cylinder and connected with the inner wall of the wedge-shaped block collecting cylinder; and the buffer is arranged in the shearing rubber assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large-load explosion bolts, and more particularly to a composite shock isolation device applied to large-load explosion bolts. BACKGROUND

[0002] Explosion bolts are widely used in satellites, and are needed to complete the unlocking action when the satellite and the rocket are separated, the mechanism is unfolded, and the series satellites are separated. Explosion bolts play the functions of compression and release, and the greater the load they bear, the greater the unlocking force they need, which causes more gunpowder to be filled, and further causes the problem of greater impact generated by explosion. The impact will cause the screw rod to hit the satellite structure with a large impulse, which may cause damage to sensitive single machines (crystal oscillator, etc.) on the satellite, leading to the failure of the satellite mission.

[0003] Therefore, attenuating the large-scale impact of the large-load explosion bolt unlocking is the basis for ensuring the safety of the satellite and the success of the mission, reducing the impact response peak value transmitted to the sensitive single machine, and ensuring that the sensitive load is not damaged.

[0004] In summary, the existing shock isolation means are all single materials, which absorb the impact capacity through plastic deformation of the material, and have the disadvantages of poor shock isolation performance, low shock isolation frequency band, etc. Therefore, providing a high-performance shock isolation and absorption device has become an urgent problem in the industry.

[0005] The foregoing narrative is to provide general background information and does not necessarily constitute the prior art. SUMMARY

[0006] The present application aims to provide a composite shock isolation device applied to large-load explosion bolts, which reduces the impact generated when the large-load explosion bolt is ignited and unlocked, alleviates the impact on the satellite structure and the single machine, and ensures that it can efficiently absorb the impact energy.

[0007] The application provides a composite shock isolation device applied to a large-load explosive bolt, which comprises a large-load explosive bolt assembly and a composite shock isolation device. The bolt head and the separation screw rod are connected; a through hole is arranged at the bottom of the collecting box, the separation screw rod passes through the through hole, and the separation screw rod is threadedly connected with the loading nut to apply a connection compression pre-tightening force, and the loading nut is located in the collecting box; the composite shock isolation device is placed in the collecting box, and the composite shock isolation device comprises a lower panel, an upper panel, an Euler beam, a wedge-shaped block, a shear rubber assembly, a buffer and a wedge-shaped block collecting cylinder; the lower panel is pressed on the loading surface of the loading nut through the stud segment of the loading nut, and the wedge-shaped block is installed at the end of the separation screw rod; the two ends of the Euler beam are respectively connected with the upper panel and the lower panel, a basic frame is formed between the lower panel, the upper panel and the Euler beam, and the wedge-shaped block, the shear rubber assembly and the wedge-shaped block collecting cylinder are located in the basic frame; one end of the wedge-shaped block collecting cylinder is connected with the wedge-shaped block, and the other end of the wedge-shaped block collecting cylinder is connected with the upper panel; the shear rubber assembly is located in the wedge-shaped block collecting cylinder and connected with the inner wall of the wedge-shaped block collecting cylinder; and the buffer is arranged in the shear rubber assembly.

[0008] The bolt head of the large-load explosive bolt is connected with a compression surface and fixed when the satellite uses the explosive bolt compression structure, and the upper end surface of the collecting box is connected with the satellite structure and fixed. When the large-load explosive bolt is ignited and exploded, the separation screw rod is separated from the bolt head, the separation screw rod drives the loading nut to impact the composite shock isolation device, the lower panel is driven to move to compress the Euler beam, and the Euler beam absorbs the initial impact; after the separation screw rod moves a distance, the wedge-shaped block installed on the separation screw rod contacts the shear rubber assembly, the shear rubber assembly and the buffer are compressed, and most of the impact energy is absorbed; the composite shock isolation device alleviates the impact on the satellite through multi-stage impact absorption; after the initial impact is absorbed by the nonlinear Euler beam, the shear rubber assembly is further buffered, and finally the buffer is deformed to absorb the impact energy to realize multi-stage reduction of the impact; thereby different frequency band energy absorption is realized, and the adaptability to explosive bolts with different load capacities is achieved.

[0009] Further, the shear rubber assembly comprises a buffer support and a connecting block, the connecting block is provided with a wedge-shaped groove matched with the wedge-shaped block, a plurality of buffer supports are arranged on the circumference of the connecting block, and the other end of the buffer support is connected with the inner wall of the wedge-shaped block collecting cylinder.

[0010] Adopting the technical scheme, the impact capacity is transmitted to the circumferential direction through the circumferential buffer support of the connecting block, the energy is avoided from being directly transmitted to the satellite structure along the axial direction, and the impact response is greatly reduced.

[0011] Further, the surface of the buffer support and the connecting block is arranged at an acute angle. Further improve the effect of buffering.

[0012] Further, the large bearing explosion bolt further comprises a gasket, the gasket passes through the separation screw and is located between the bottom surface of the collection box and the loading nut. The gasket passes through the separation screw, applies a connection compression pre-tightening force through the loading nut, and further improves the connection strength and stability.

[0013] Further, the buffer member is a spring or a porous polytetrafluoroethylene buffer block.

[0014] Further, the composite shock isolation device further comprises a rubber pad connected to the upper surface of the upper panel. The rubber pad can further improve the buffering effect.

[0015] Further, the composite shock isolation device further comprises a plurality of ear pieces installed on the lower edge side wall of the wedge block collection cylinder.

[0016] Adopting the technical scheme, when the separation screw moves a distance, the wedge block installed on the separation screw contacts the shear rubber assembly, compresses the shear rubber assembly and the buffer member, and the ear piece installed in the wedge block collection cylinder can block the wedge block that is impacted upward, avoiding the influence of the rebound of the separation screw on the unlocking and separation.

[0017] Further, the Euler beam is a nonlinear beam, and a plurality of the Euler beams are arranged between the upper panel and the lower panel. The thickness of the Euler beam is a key factor affecting the stiffness of the buffer device, and the nonlinear characteristic enables the structure to absorb more energy.

[0018] Further, the two pieces of the Euler beam are a group, four groups are uniformly distributed in the circumferential direction, and the Euler beams are installed in the radial direction.

[0019] Further, four ear pieces are uniformly installed on the lower edge side wall of the wedge block collection cylinder in the circumferential direction.

[0020] The application provides a composite shock isolation device applied to a large bearing explosive bolt, which relieves the impact on a satellite through multiple stages of shock absorption; after absorbing the initial impact through a nonlinear Euler beam, the impact is further buffered through a shear rubber assembly, and finally the impact energy is absorbed through the deformation of a buffer to realize multiple stages of impact reduction; the stiffness is adjusted by adjusting the thickness of the Euler beam, so that different frequency bands of energy are absorbed, and the adaptive capacity for explosive bolts with different bearing capacities is achieved; the impact capacity is transmitted in the circumferential direction through the shear rubber assembly, so that the energy is not directly transmitted to the satellite structure in the axial direction, thereby greatly reducing the impact response; after the composite shock isolation device is assembled alone, the explosive bolt and other components are installed simply, and only need to be placed in a collection box; the composite shock isolation device is provided with an ear piece to avoid the influence of the rebound of the separation screw rod on the unlocking separation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The application provides a structure schematic view of the composite shock isolation device applied to the large bearing explosive bolt.

[0022] Figure 2 For Figure 1 The application provides a plane schematic view of the large bearing explosive bolt of the composite shock isolation device applied to the large bearing explosive bolt.

[0023] Figure 3 For Figure 1 The application provides a plane schematic view of the composite shock isolation device applied to the large bearing explosive bolt.

[0024] Figure 4 For Figure 1 The application provides a plane schematic view of the combination of the large bearing explosive bolt and the composite shock isolation device of the composite shock isolation device applied to the large bearing explosive bolt.

[0025] 1, large bearing explosive bolt assembly 11, bolt head 12, separation screw rod

[0026] 13, collection box 131, through hole 14, gasket

[0027] 15, loading nut 2, composite shock isolation device 21, including lower panel

[0028] 22, upper panel 23, Euler beam 24, wedge block

[0029] 25, shear rubber assembly 251, buffer support 252, connecting block

[0030] 253, wedge-shaped groove 26, buffer 27, rubber pad

[0031] 28, wedge block collection cylinder 29, ear piece 3, basic frame DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0033] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application are used for distinguishing between similar objects and do not necessarily have to follow a specific sequential order.

[0034] Example 1

[0035] Figure 1 The structure schematic diagram of the composite shock isolation device applied to the large bearing explosive bolt provided in the embodiment of the present application, Figure 2 The plane schematic diagram of the large bearing explosive bolt applied to the composite shock isolation device in the embodiment of the present application, Figure 1 The plane schematic diagram of the composite shock isolation device applied to the composite shock isolation device in the embodiment of the present application, Figure 3 The plane schematic diagram of the large bearing explosive bolt and the composite shock isolation device combined together applied to the composite shock isolation device in the embodiment of the present application. Please refer to Figure 1 Figure 4 Figure 1 Figure 1 Figure 2 Figure 3 Figure 4 ​​​​​​The present invention provides a composite anti-impact device for high-load-bearing explosive bolts, comprising a high-load-bearing explosive bolt assembly 1 and a composite anti-impact device 2. The high-load-bearing explosive bolt 1 includes a bolt head 11, a separating screw 12, a collection box 13, and a loading nut 15. The bolt head 11 and the separating screw 12 are connected. A through hole 131 is provided at the bottom of the collection box 13. The separating screw 12 passes through the through hole 131 and is threadedly connected to the separating screw 12 by the loading nut 15 for applying a connection clamping preload. The loading nut 15 is located inside the collection box 13. The composite anti-impact device 2 is placed inside the collection box 13. The composite anti-impact device 2 includes a lower panel 21, an upper panel 22, an Euler beam 23, a wedge block 24, a shear rubber assembly 25, a buffer 26, and a wedge block collection cylinder. 28; The lower panel 21 passes through the stud section of the loading nut 15 and presses against the loading surface of the loading nut 15; the wedge block 24 is installed at the end of the separating screw 12; the two ends of the Euler beam 23 are respectively connected to the upper panel 22 and the lower panel 21; a basic frame 3 is formed between the lower panel 21, the upper panel 22 and the Euler beam 23; the wedge block 24, the shear rubber assembly 25 and the wedge block collecting cylinder 28 are located within the basic frame 3; one end of the wedge block collecting cylinder 28 is connected to the wedge block 24, and the other end of the wedge block collecting cylinder 28 is connected to the upper panel 22; the shear rubber assembly 25 is located inside the wedge block collecting cylinder 28 and connected to the inner wall of the wedge block collecting cylinder 28; the buffer 26 is provided inside the shear rubber assembly 25.

[0036] It should be noted that the bolt head 11 of the high-load explosive bolt 1 is equipped with an initiating explosive and a piston; the initiating explosive in the bolt head 11 is ignited to generate high-pressure gas, which drives the piston to move and cut off the separation screw 12; when the satellite uses the explosive bolt to tighten the structure, the bolt head 11 of the high-load explosive bolt 1 is connected and fixed to the tightening surface, and the upper end face of the collection box 13 is connected and fixed to the satellite structure.

[0037] In use, after the high-load explosive bolt 1 is ignited and detonated, the separating screw 12 separates from the bolt head 11. The separating screw 12 drives the loading nut 15 to impact the composite vibration isolation device 2, pushing the lower panel 21 to move and compress the Euler beam 23. The Euler beam 23 absorbs the initial impulse. It should be noted that the thickness of the Euler beam 23 is a key factor affecting the stiffness of the buffer device. In addition, after the separating screw 12 moves a certain distance, the wedge block 24 installed on the separating screw 12 contacts the shear rubber assembly 25, compressing the shear rubber assembly 25 and the buffer 26, absorbing most of the impact energy.

[0038] The application of the composite shock isolation device applied to the large bearing explosive bolt of the application mainly considers that a large bearing explosive bolt 1 will generate a large amount of impact after unlocking ignition, a composite shock isolation device 2 is designed to alleviate the impact on the satellite through multiple stages of shock absorption; after the initial impact is absorbed by the nonlinear Euler beam 23, the composite shock isolation device 2 further buffers through the shear rubber assembly 25, and finally the impact energy is absorbed through the deformation of the buffer 26 to realize multiple stages of impact reduction; the composite shock isolation device 2 realizes stiffness adjustment by adjusting the thickness of the Euler beam 23, thereby realizing energy absorption of different frequency bands and having adaptability to explosive bolts with different bearing capacities; on the other hand, the composite shock isolation device 2 is simply assembled with components such as the explosive bolt after being assembled alone, and only needs to be placed in the collection box 13.

[0039] As shown in Figure 3 , the shear rubber assembly 25 of the application includes a buffer support 251 and a connecting block 252, the connecting block 252 is provided with a wedge-shaped groove 253 matched with the wedge-shaped block 24, a plurality of buffer supports 251 are arranged on the circumference of the connecting block 252, and the other end of the buffer support 251 is connected with the inner wall of the wedge-shaped block collection cylinder 28. Specifically, the surface of the buffer support 251 and the connecting block 252 is arranged at an acute angle; further improving the buffering effect.

[0040] It should be noted that the circumferential buffer support 251 of the connecting block 252 transmits the impact capacity to the circumferential direction, avoiding the direct transmission of energy to the satellite structure along the axial direction, thereby greatly reducing the impact response.

[0041] As shown in Figure 2 , the large bearing explosive bolt 1 of the application further includes a gasket 14, the gasket 14 passes through the separation screw 12 and is located between the bottom surface of the collection box 13 and the loading nut 15.

[0042] The gasket 14 passes through the separation screw 12 and applies a connecting compression pre-tightening force through the loading nut 15, further improving the connection strength and stability.

[0043] Further, the buffer 26 of the application is a spring or a porous polytetrafluoroethylene buffer block.

[0044] Further, the composite shock isolation device 2 of the application further includes a rubber pad 27, the rubber pad 27 is connected to the upper surface of the upper panel 22; the rubber pad 27 can further improve the buffering effect.

[0045] Further referring to Figure 3 , Figure 4 , the composite shock isolation device 2 of the application further includes a plurality of ear pieces 29 installed on the lower edge side wall of the wedge-shaped block collection cylinder 28; specifically, four ear pieces 29 are evenly installed on the circumferential edge of the lower edge side wall of the wedge-shaped block collection cylinder 28.

[0046] It should be noted that when the separation screw 12 moves a distance, the wedge block 24 mounted on the separation screw 12 contacts the shear rubber assembly 25, compresses the shear rubber assembly 25 and the buffer 26, and the ear 29 mounted in the wedge block collecting cylinder 28 can be stuck to the wedge block 24, so as to avoid the influence of the rebound of the separation screw 12 on the unlocking separation.

[0047] Further, the Euler beam 23 is a nonlinear beam, a plurality of the Euler beams 23 are arranged between the upper panel 22 and the lower panel 21, two of the plurality of the Euler beams 23 are a group, four groups are uniformly distributed in the circumference, and the Euler beam 23 is installed in the radial direction.

[0048] It should be noted that the thickness of the Euler beam 23 is a key factor affecting the stiffness of the buffer device, and the nonlinear characteristic enables the structure to absorb more energy.

[0049] Based on the above description, the application has the following advantages:

[0050] 1. The composite shock isolation device applied to the large-load explosive bolt can relieve the impact on the satellite through multi-stage shock absorption.

[0051] 2. The composite shock isolation device applied to the large-load explosive bolt can further buffer through the shear rubber assembly after absorbing the initial impact through the nonlinear Euler beam, and finally absorb the impact energy through the buffer to realize multi-stage impact reduction.

[0052] 3. The composite shock isolation device applied to the large-load explosive bolt can realize stiffness adjustment by adjusting the thickness of the Euler beam, so as to realize energy absorption of different frequency bands and adaptability to explosive bolts with different load capacities.

[0053] 4. The composite shock isolation device applied to the large-load explosive bolt can transmit the impact capacity to the circumferential direction through the shear rubber assembly, so as to avoid direct transmission of energy to the satellite structure along the axial direction, thereby greatly reducing the impact response.

[0054] 5. The composite shock isolation device applied to the large-load explosive bolt is simple to install after being assembled alone, and only needs to be placed in the collecting box.

[0055] 6. The composite shock isolation device applied to the large-load explosive bolt is provided with an ear to avoid the influence of the rebound of the separation screw on the unlocking separation.

[0056] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A composite anti-impact device for high-load-bearing explosive bolts, characterized in that, It includes a high-load-bearing explosive bolt assembly (1) and a composite anti-explosion device (2); The high-load-bearing explosive bolt (1) includes a bolt head (11), a separating screw (12), a collection box (13), and a loading nut (15), wherein the bolt head (11) and the separating screw (12) are connected; A through hole (131) is provided at the bottom of the collection box (13). The separating screw (12) passes through the through hole (131) and is threadedly connected to the separating screw (12) by the loading nut (15) for applying a connection clamping preload. The loading nut (15) is located inside the collection box (13). The composite shock absorber (2) is placed in the collection box (13). The composite shock absorber (2) includes a lower panel (21), an upper panel (22), an Euler beam (23), a wedge block (24), a shear rubber assembly (25), a buffer (26), and a wedge block collection cylinder (28). The lower panel (21) passes through the stud section of the loading nut (15) and presses against the loading surface of the loading nut (15); the wedge block (24) is installed at the end of the separating screw (12); The upper panel (22) and the lower panel (21) are respectively connected to the two ends of the Euler beam (23). A basic frame (3) is formed between the lower panel (21), the upper panel (22) and the Euler beam (23). The wedge block (24), the shear rubber assembly (25) and the wedge block collecting cylinder (28) are located within the basic frame (3). One end of the wedge-shaped block collecting cylinder (28) is connected to the wedge-shaped block (24), and the other end of the wedge-shaped block collecting cylinder (28) is connected to the upper panel (22); the shearing rubber assembly (25) is located inside the wedge-shaped block collecting cylinder (28) and connected to the inner wall of the wedge-shaped block collecting cylinder (28); the buffer (26) is provided inside the shearing rubber assembly (25).

2. The composite impact isolation device for high-load-bearing explosive bolts according to claim 1, characterized in that, The shear rubber assembly (25) includes a buffer bracket (251) and a connecting block (252). The connecting block (252) is provided with a wedge groove (253) that cooperates with the wedge block (24). A plurality of buffer brackets (251) are arranged circumferentially on the connecting block (252). The other end of the buffer bracket (251) is connected to the inner wall of the wedge block collecting cylinder (28).

3. The composite impact isolation device applied to high-load-bearing explosive bolts according to claim 2, characterized in that, The surfaces of the buffer bracket (251) and the connecting block (252) are set at acute angles.

4. The composite anti-impact device for high-load-bearing explosive bolts according to claim 1, characterized in that, The high-load explosive bolt (1) also includes a washer (14) which passes through the separation screw (12) and is located between the bottom surface of the collection box (13) and the loading nut (15).

5. The composite anti-impact device for high-load-bearing explosive bolts according to claim 1, characterized in that, The buffer (26) is a spring or a porous polytetrafluoroethylene buffer block.

6. The composite anti-impact device for high-load-bearing explosive bolts according to claim 1, characterized in that, The composite shock-absorbing device (2) also includes a rubber pad (27), which is connected to the top of the upper panel (22).

7. The composite impact isolation device for high-load-bearing explosive bolts according to claim 1, characterized in that, The composite shock-absorbing device (2) also includes ear pieces (29) on the lower edge sidewall of the wedge-shaped block collecting cylinder (28).

8. The composite anti-impact device for high-load-bearing explosive bolts according to claim 1, characterized in that, The Euler beam (23) is a nonlinear beam, and a plurality of Euler beams (23) are arranged between the upper panel (22) and the lower panel (21).

9. The composite impact isolation device for high-load-bearing explosive bolts according to claim 8, characterized in that, The Euler beams (23) are arranged in pairs, with four groups evenly distributed circumferentially, and the Euler beams (23) are installed radially.

10. The composite anti-impact device for high-load-bearing explosive bolts according to claim 7, characterized in that, Four ear pieces (29) are evenly installed circumferentially on the lower edge sidewall of the wedge-shaped block collecting cylinder (28).

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