Anti-impact structure of modular multi-stage unit design

Abstract

The invention relates to the technical field of damping devices, in particular to a modular multi-stage unit design anti-impact structure which comprises a shell unit, a plurality of first energy dissipation units are arranged in the shell unit, the first energy dissipation units are connected through flexible materials, and the first energy dissipation units can relatively slide in the shell unit. A plurality of second energy dissipation units are arranged in the first energy dissipation unit, and the second energy dissipation units can collide and extrude one another in the second energy dissipation units. Relative movement between the first energy dissipation units is hindered through restraining force of the flexible materials, external impact loads are absorbed and consumed, and the energy dissipation capacity of the whole structure is enhanced. And through mutual collision and extrusion of the second energy dissipation units in the first energy dissipation units, the energy dissipation efficiency of the whole structure is further improved, the external impact load is effectively and rapidly dissipated, and the impact resistance of the whole structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbing devices, and in particular to an anti-impact structure with a modular multi-level unit design. Background Art

[0002] Aerospace, drone systems and other fields all have common needs for resisting impact and achieving high-efficiency kinetic energy absorption and dissipation, such as drone collision prevention and robot high-acceleration interaction. Effectively absorbing impact energy, improving absorption efficiency and having a lower weight are the goals pursued by this type of energy-absorbing structure design.

[0003] However, the current traditional energy-absorbing structure design scheme mainly focuses on a single material and structure, resulting in low efficiency in energy absorption and dissipation. It is difficult to achieve efficient energy dissipation in the face of high-acceleration impact loads. Due to the differences between structures of different shapes, it is inconvenient to carry multiple energy-absorbing structures at the same time, which poses a great challenge to the normal operation of the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide an impact-resistant structure with a modular multi-level unit design. Through the design of multi-level energy dissipation units, the energy absorption and dissipation efficiency of the overall structure when facing high acceleration impact loads is increased, the external impact load is effectively and quickly dissipated, and the impact resistance of the overall structure is increased.

[0005] In order to solve the above technical problems, the embodiments of the present invention provide a technical solution as follows:

[0006] A modular multi-level unit design of impact-proof structure, comprising a shell unit, wherein a plurality of first energy dissipation units are arranged in the shell unit, wherein the first energy dissipation units are connected by a flexible material, wherein the first energy dissipation units can slide relative to each other in the shell unit, and wherein a plurality of second energy dissipation units are arranged in the first energy dissipation unit, wherein the second energy dissipation units can collide and squeeze each other in the second energy dissipation units.

[0007] Furthermore, the first energy dissipation unit includes multiple layers of energy absorbing units, each of which is a cavity structure with a polygonal cross section. The energy absorbing units are arranged in layers along the axial direction of the shell unit, and the energy absorbing units in the same layer have the same shape.

[0008] Furthermore, the energy-consuming units are distributed in a gradient manner along the axial direction of the outer shell unit, and the outer diameters of the energy-consuming units at different levels increase or decrease step by step.

[0009] Furthermore, the second energy dissipation unit is a lightweight sphere, and the second energy dissipation unit is naturally stacked in the cavity of the energy consumption unit.

[0010] Furthermore, the cross section of the energy consumption unit is a regular hexagon.

[0011] Furthermore, the shell unit is a cavity structure with a polygonal cross section, and the shell unit has a rigid structure.

[0012] Furthermore, it comprises a plurality of shell units, wherein the shell units contain magnetic materials, and the plurality of shell units can be attracted to each other.

[0013] Furthermore, the cross section of the shell unit is a regular hexagon.

[0014] Furthermore, the flexible material penetrates into the interior of the shell unit by hot melting, so as to flexibly connect the first energy dissipation unit with the shell unit and the first energy dissipation unit with the first energy dissipation unit.

[0015] Furthermore, the housing unit is made of ceramic.

[0016] Compared with the prior art, the impact-proof structure of modular multi-level unit design provided by the present invention has a plurality of first energy dissipation units arranged in a shell unit and a flexible connection arrangement of the first energy dissipation units, so that the relative movement between the first energy dissipation units is hindered by the restraining force of the flexible material, the external impact load is absorbed and consumed, and the energy dissipation capacity of the overall structure is enhanced; the energy dissipation efficiency of the overall structure is further improved by the mutual collision and extrusion of the second energy dissipation units inside the first energy dissipation units, the external impact load is effectively and quickly dissipated, and the impact resistance of the overall structure is increased; the energy dissipation units arranged in multiple layers of gradients in the first energy dissipation units further enhance the overall structure's ability to withstand impact loads, and increase the absorption and dissipation efficiency of the external impact load energy; the arrangement of the polygonal cross-section of the shell unit enables the shell unit to be modularly assembled, and the shell units can be densely arranged, thereby improving space utilization and manufacturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 It is an exploded view of an impact-proof structure of a modular multi-level unit design in an embodiment of the present invention;

[0019] Figure 2 It is a front view of an impact-proof structure of a modular multi-level unit design in an embodiment of the present invention;

[0020] Figure 3 Yes Figure 2 Middle AA section view;

[0021] Figure 4 is a schematic diagram of the position structure of the first energy dissipation unit and the second energy dissipation unit in an embodiment of the present invention;

[0022] Figure 5 Yes Figure 2 Middle BB section view;

[0023] Figure 6 It is a schematic diagram of the structure of the first energy dissipation unit in an embodiment of the present invention.

[0024] Explanation of the reference numerals: 10. outer shell unit; 11. cover body; 12. shell body; 13. base; 20. first energy dissipation unit; 21. bottom layer energy dissipation unit; 22. middle layer energy dissipation unit; 23. upper layer energy dissipation unit; 30. second energy dissipation unit; 40. flexible material. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the claims of the present application can be implemented.

[0026] like Figure 1-4As shown, one embodiment of the present invention relates to an impact-proof structure of modular multi-level unit design, including a shell unit 10, wherein the shell unit 10 includes a shell 12, the shell 12 is a hollow cylindrical structure, the shell 12 and the cover 11 and the base 13 at both ends form a sealed hollow cavity structure, a plurality of first energy dissipation units 20 are arranged in the cavity of the shell unit 10, gaps are arranged between the plurality of first energy dissipation units 20, the first energy dissipation units 20 can slide relatively in the shell unit 10, the first energy dissipation units 20 are connected by a flexible material 40, the flexible material 40 is poured into the cavity of the shell unit 10, the first energy dissipation units 20 are flexibly connected to the inner wall of the cavity of the shell unit 10, and the first energy dissipation units 20 are flexibly connected to the first energy dissipation units 20, and a certain restraining force is provided to prevent the first energy dissipation units 20 from falling off, preferably, the flexible material 40 penetrates into the shell unit 10 by hot melting, and the first energy dissipation units 20 are flexibly connected to the shell unit 10, and the first energy dissipation units 20 are flexibly connected to the first energy dissipation units 20. It must be ensured that when the impact-proof structure of a modular multi-level unit design provided in an embodiment of the present invention is subjected to an external impact load, relative slippage occurs between the first energy dissipation units 20, and the external impact load is absorbed and dissipated. Under the action of the constraint force of the flexible material 40, the relative movement between the first energy dissipation units 20 is hindered, such as shearing and slipping, so that the external impact load is absorbed and consumed, and the energy absorption effect is further improved, and the energy dissipation capacity of the overall structure is enhanced. At the same time, the flexible material 40 provides space for relative displacement of the first energy dissipation unit 20, and its interface adhesion also enhances the energy dissipation capacity of the overall structure; a plurality of second energy dissipation units 30 are arranged in the first energy dissipation unit 20, and the second energy dissipation units 30 can collide and squeeze each other in the second energy dissipation unit 30. Preferably, the second energy dissipation unit 30 is a lightweight sphere, and the second energy dissipation unit 30 is naturally stacked in the cavity of the first energy dissipation unit 20. In an embodiment of the present invention, when an impact-resistant structure with a modular multi-level unit design is subjected to an external impact load, movement modes such as friction, extrusion, collision, and separation occur between the second energy dissipation units 30 in the cavity of the first energy dissipation unit 20, and the energy of the external load is absorbed and dissipated during these movements, thereby achieving effective and rapid dissipation of the external impact load and increasing the impact resistance of the overall structure.

[0027] In one embodiment, it relates to an anti-shock structure of modular multi-level unit design, including a plurality of shell units 10, which can be combined into a densely arranged structure to effectively increase the space utilization of the overall structure. For example, the cross-section of the shell unit 10 can adopt a polygonal structure, such as a triangle, a square, a hexagon, etc. Preferably, the shell unit 10 adopts a cylindrical barrel structure with a regular hexagonal cross-section. The shell unit 10 is a rigid structure that can effectively withstand the first impact of an external impact load. In an exemplary example, the shell unit 10 is made of a rigid material, and the shell unit 10 contains a magnetic material, and a plurality of the shell units 10 can be mutually adsorbed. In an embodiment of the present invention, when an anti-shock structure of a modular multi-level unit design is subjected to an external impact load, the magnetic restraint force between the shell units 10 further enhances the energy dissipation effect of the overall structure, and can prevent the shell unit 10 from escaping under high-speed impact.

[0028] like Figure 5-6 As shown, in one embodiment, it relates to an impact-proof structure of modular multi-level unit design, wherein the first energy dissipation unit 20 includes multiple layers of energy-absorbing units, the energy-absorbing units are cavity structures with polygonal cross-sections, multiple layers of energy-absorbing units are arranged axially along the shell unit 10, and the energy-absorbing units in the same layer have the same shape, and the first energy dissipation unit 20 is gradiently distributed along the axial direction of the shell unit 10, that is, the outer diameters of the energy-absorbing units at different levels increase or decrease step by step in sequence, preferably, according to the main force direction of the impact-proof structure of modular multi-level unit design, the outer diameter of the first energy dissipation unit 20 decreases step by step along the direction of the impact load. In an exemplary example, the first energy dissipation unit 20 includes multiple layers of energy-absorbing units, and the energy-absorbing units include a bottom layer energy-absorbing unit 21, a middle layer energy-absorbing unit 22, and an upper layer energy-absorbing unit 23 arranged in sequence along the base 13 toward the cover body 11, and the outer diameters of the bottom layer energy-absorbing unit 21, the middle layer energy-absorbing unit 22, and the upper layer energy-absorbing unit 23 decrease in sequence.

[0029] like Figure 3-4 As shown, in one embodiment, it relates to an impact-proof structure of modular multi-level unit design, wherein the first energy dissipation unit 20 includes multiple layers of energy absorbing units, the energy absorbing unit is a cavity structure with a polygonal cross-section, and the second energy dissipation unit 30 is a lightweight sphere arranged in the cavity of the energy absorbing unit. When the impact-proof structure of modular multi-level unit design provided by the embodiment of the present invention is subjected to an external impact load, the shell unit 10 bears the first impact, and under the action of the impact energy, the second energy dissipation unit 30 undergoes friction, extrusion, collision and separation in the cavity of the first energy dissipation unit 20, and part of the energy of the impact load is absorbed and dissipated; the second energy dissipation unit 30 will produce flow plasticity and adaptability to various dynamic loads, and can suppress the rebound of the system when it is impacted.

[0030] The relationship between the friction force of the second energy dissipation units 30 when interacting with each other and the stress is:

[0031]

[0032] Where α is a function related to the friction sliding surface, σ a is the impact stress, σ R is the normal stress, and p0 is the surface stress of the unit:

[0033]

[0034] Wherein P is the contact force, R is the radius of the second energy dissipation unit 30, w is the number of the second energy dissipation units 30, and p0 is the surface stress on the second energy dissipation unit 30. The second energy dissipation unit 30 will increase the probability of colliding with the wall in a limited space, further improving the energy dissipation efficiency.

[0035] The present invention provides a modular multi-level unit-designed impact-proof structure. By arranging a plurality of first energy dissipation units in an outer shell unit and arranging a flexible connection between the first energy dissipation units, the constraint force of the flexible material is used to hinder the relative movement between the first energy dissipation units, so as to absorb and consume the external impact load and enhance the energy dissipation capacity of the overall structure. By the mutual collision and extrusion of the second energy dissipation units inside the first energy dissipation unit, the energy dissipation efficiency of the overall structure is further improved, the external impact load is effectively and quickly dissipated, and the impact resistance of the overall structure is increased. By the energy dissipation units of the first energy dissipation unit with multiple layers of gradient arrangement, the bearing capacity of the overall structure for the impact load is further enhanced, and the absorption and dissipation efficiency of the external impact load energy is increased. By arranging the polygonal cross-section of the outer shell unit, the outer shell unit can be assembled in a modular manner, and the outer shell units can be densely arranged, so as to improve the space utilization and manufacturing efficiency.

[0036] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A modular multi-level unit design of impact protection structure, characterized in that: The invention comprises a shell unit (10), wherein a plurality of first energy dissipation units (20) are arranged in the shell unit (10), wherein the first energy dissipation units (20) are connected to each other via a flexible material (40), wherein the first energy dissipation units (20) can slide relative to each other in the shell unit (10), and wherein a plurality of second energy dissipation units (30) are arranged in the first energy dissipation unit (20), wherein the second energy dissipation units (30) can collide and squeeze with each other in the second energy dissipation units (30).

2. The impact-proof structure of modular multi-level unit design according to claim 1, characterized in that: The first energy dissipation unit (20) comprises a plurality of layers of energy dissipation units, each of which is a cavity structure with a polygonal cross section. The energy dissipation units are arranged in layers along the axial direction of the outer shell unit (10), and the energy dissipation units in the same layer have the same shape.

3. The impact-proof structure of modular multi-level unit design according to claim 2, characterized in that: The energy consumption units are distributed in a gradient manner along the axial direction of the outer shell unit (10), and the outer diameters of the energy consumption units at different levels increase or decrease step by step.

4. The impact-resistant structure of modular multi-level unit design according to claim 2, characterized in that: The second energy dissipation unit (30) is a lightweight sphere, and the second energy dissipation unit (30) is naturally stacked in the cavity of the energy consumption unit.

5. The impact-proof structure of modular multi-level unit design according to claim 3, characterized in that: The cross section of the energy consumption unit is a regular hexagon.

6. The impact-resistant structure of modular multi-level unit design according to claim 1, characterized in that: The housing unit (10) is a cavity structure with a polygonal cross section, and the housing unit (10) has a rigid structure.

7. The impact-resistant structure of modular multi-level unit design according to claim 6, characterized in that: It comprises a plurality of shell units (10), wherein the shell units (10) contain magnetic material, and the plurality of shell units (10) can be mutually attracted.

8. The impact-proof structure of modular multi-level unit design according to any one of claims 1 to 7, characterized in that: The cross section of the housing unit (10) is a regular hexagon.

9. The impact-resistant structure of modular multi-level unit design according to claim 1, characterized in that: The flexible material (40) penetrates into the interior of the outer shell unit (10) by hot melting, so as to flexibly connect the first energy dissipation unit (20) with the outer shell unit (10), and the first energy dissipation unit (20) with the first energy dissipation unit (20).

10. The impact-resistant structure of modular multi-level unit design according to claim 1, characterized in that: The housing unit (10) is made of ceramic.

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