A butterfly-shaped multi-form compression-resistant energy-absorbing unit and energy-absorbing structure

Abstract

The application discloses a butterfly-shaped multi-form compression-resistant energy-absorbing unit and an energy-absorbing structure. The energy-absorbing unit comprises a constraint ring and at least two elastic members. The elastic member is in a ring structure, and the ring track comprises a first curve segment and a second curve segment connected together. The first curve segment and the second curve segment are connected at a concave position. The coaxial lines of the elastic members are nested with each other. The constraint ring is sleeved outside the concave position of the elastic members. The energy-absorbing unit can be applied to different application scenarios. Different requirements for resisting impact and energy absorption can be met by changing the thickness and height of the elastic member. In the compression deformation process, the second curve segment of the elastic member is deformed to absorb energy. Then, the first curve segment of the elastic member is deformed to absorb energy by being concave to the middle. Finally, the curve segment is continuously deformed to absorb energy until it is dense. The deformation stroke is large, the energy-absorbing and buffering effect is better, and the vibration in other directions can be effectively absorbed in addition to the front stress direction.

Description

Technical Field

[0001] This invention relates to the field of energy-absorbing structures, specifically to a butterfly-shaped multi-form compressive energy-absorbing unit and energy-absorbing structure. Background Technology

[0002] In recent years, the demand for lightweight, high-load-bearing structures has continued to increase in fields such as protective packaging of precision components and aerospace engineering. Traditional solid structures can no longer meet the requirements of modern engineering applications. As a result, pressure-resistant energy-absorbing structures have received widespread attention from the academic and engineering communities. Conducting research on the design and performance of new pressure-resistant energy-absorbing structures has important theoretical value and engineering significance.

[0003] Existing energy-absorbing structures have the following shortcomings: the energy absorption direction is relatively singular, generally only having a buffering energy absorption effect in a fixed direction, making it difficult to adapt to various application scenarios; limited by the size of the energy-absorbing structure itself, conventional energy-absorbing structures have a small collapse stroke when subjected to impact, resulting in poor buffering effect. Summary of the Invention

[0004] The purpose of this invention is to provide a butterfly-shaped multi-form pressure-resistant energy-absorbing unit and energy-absorbing structure, which solves the problems of limited application scenarios and poor buffering effect of existing energy-absorbing structures.

[0005] The present invention achieves the above objectives through the following technical solutions: A butterfly-shaped multi-form pressure-resistant energy-absorbing unit includes a constraint ring and at least two elastic elements. The elastic elements are ring-shaped structures, and their ring-shaped trajectory includes a first curved segment and a second curved segment that are connected in an enclosing manner. The connection between the first curved segment and the second curved segment is concave inward. Each elastic element is coaxial and nested with each other. The constraint ring is sleeved on the outside of the concave part of each elastic element.

[0006] As a preferred embodiment of the present invention, the elastic element has two components, including a first elastic element and a second elastic element. The planes on which the annular trajectories of the two elastic elements lie are perpendicular to each other. In this embodiment, two elastic elements are nested perpendicularly to each other. Alternatively, multiple elastic elements can also be used.

[0007] As a preferred embodiment of the present invention, the annular trajectory of the first elastic element is obtained by equidistant magnification of the annular trajectory of the second elastic element, so that the second elastic element is vertically nested within the first elastic element. This embodiment proposes the dimensional relationship between the first elastic element and the second elastic element to facilitate mutual nesting.

[0008] As a preferred embodiment of the present invention, both elastic elements are symmetrical about their own central axis. This embodiment is more stable under force and can also be configured with asymmetrical shapes for different load requirements.

[0009] As a preferred embodiment of the present invention, the inner side of the constraint ring is provided with a plurality of grooves for engaging with the recesses of the elastic element. The number of grooves is twice the number of elastic elements. This embodiment uses the grooves to engage with the two sides of the elastic element so that the constraint ring can stably constrain the elastic element.

[0010] To utilize the aforementioned energy-absorbing units, this invention also proposes a butterfly-shaped multi-form compressive energy-absorbing structure, comprising at least one of the aforementioned energy-absorbing units, as well as a first inlay structure and a second inlay structure. The first inlay structure is used to connect with the first curved segment of the elastic element, and the second inlay structure is used to connect with the second curved segment of the elastic element. This solution improves stability by setting inlay structures to connect with both ends of the elastic element. This energy-absorbing structure can connect multiple energy-absorbing units as needed.

[0011] As a preferred embodiment of the present invention, the surface of the first inlay structure is provided with a set of slots for fitting the first curved segment of the elastic member, the surface of the second inlay structure is provided with an insertion hole, and the second curved segment of the elastic member is provided with a support rod that cooperates with the insertion hole. This embodiment connects the elastic member and the inlay structure by setting the slot set and the support rod.

[0012] As a preferred embodiment of the present invention, the inlay structure is a pair of parallel plates, and this embodiment uses parallel plates as the inlay structure.

[0013] As a preferred embodiment of the present invention, the slot assembly includes slot units in multiple directions, each slot unit in one direction being used to engage the first curved segment of the elastic element at different angles.

[0014] As a preferred embodiment of the present invention, the inlay structure is a pair of concentric cylinders, and the diameter of the first inlay structure is larger than that of the second inlay structure. This embodiment uses a pair of cylinders as inlay structures to form a radial energy-absorbing structure.

[0015] The beneficial effects of the present invention are as follows: Based on the energy-absorbing unit, the present invention can establish different structural models to be suitable for different application scenarios and application requirements. The energy-absorbing unit can achieve different requirements for resisting impact and absorbing energy by changing the thickness and height of the elastic element. During the compression deformation process, the second curved section of the elastic element first deforms and absorbs energy. Then, as compression continues, the first curved section of the elastic element will deform and absorb energy towards the center. Finally, the curved section continues to deform and absorb energy until it becomes dense. Its deformation stroke is large, and its energy absorption and buffering effect is better. In addition to the front force direction, it can also effectively absorb vibrations in other directions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall energy-absorbing structure and energy-absorbing unit of the present invention; Figure 2This is an exploded view of the energy-absorbing structure and energy-absorbing unit of the present invention; Figure 3 This is a schematic diagram of the parameters of the first elastic element of the energy absorption unit of the present invention, wherein A is a front view and B is a side view; Figure 4 This is a schematic diagram of the parameters of the second elastic element of the energy absorption unit of the present invention, wherein A is a front view and B is a side view; Figure 5 Figure 1 is a schematic diagram of the constraint ring parameters of the energy absorption unit of the present invention, wherein A is a top view and B is a side view; Figure 6 Figure 1 is a schematic diagram of the first inlay structure parameters of the energy-absorbing structure in Embodiment 1 of the present invention, wherein A is a top view and B is a cross-sectional view; Figure 7 Figure 1 is a schematic diagram of the second inlay structure parameters of the energy-absorbing structure in Embodiment 1 of the present invention, wherein A is a top view and B is a cross-sectional view; Figure 8 This is a schematic diagram of the first inlay structure parameters of the energy-absorbing structure in Embodiment 3 of the present invention, wherein A is a perspective view, B is a top view, and C is a side view; Figure 9 This is a schematic diagram of the second inlay structure parameters of the energy-absorbing structure in Embodiment 3 of the present invention, wherein A is a perspective view, B is a top view, and C is a side view; Figure 10 This is a schematic diagram of the overall structure of the energy-absorbing structure in Embodiment 3 of the present invention; Figure 11 This is a physical diagram of the energy-absorbing structure of Embodiment 1 of the present invention; Figure 12 This is a graph showing the compression state and performance of the energy-absorbing structure in Embodiment 2 of the present invention. In the figure: 1. First inlay structure; 2. First elastic element; 3. Second elastic element; 4. Constraint ring; 5. Second inlay structure. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1

[0019] like Figure 1-5As shown, a butterfly-shaped multi-form pressure-resistant energy-absorbing unit includes a constraint ring 4 and at least two elastic elements. The elastic elements are ring-shaped structures, and their ring-shaped trajectory includes a first curved segment and a second curved segment that are connected in an enclosing manner. The connection between the first curved segment and the second curved segment is concave inward. Each elastic element is coaxial and nested with each other. The constraint ring 4 is sleeved on the outside of the concave part of each elastic element.

[0020] In this embodiment, the energy-absorbing unit can meet different needs for resisting impact and absorbing energy by changing the thickness and height of the elastic element. During the compression deformation process, the second curved section of the elastic element first deforms and absorbs energy. Then, as compression continues, the first curved section of the elastic element will deform and absorb energy towards the center. Finally, the curved section continues to deform and absorb energy until it becomes dense. Its deformation stroke is large, and its energy absorption and buffering effect is better. In addition to the front force direction, it can also effectively absorb vibrations in other directions.

[0021] Preferably, there are two elastic elements, including a first elastic element 2 and a second elastic element 3, and the planes on which the annular trajectories of the two elastic elements lie are perpendicular to each other. As an alternative, there may also be multiple elastic elements.

[0022] Preferably, the annular trajectory of the first elastic element 2 is obtained by equidistant magnification of the annular trajectory of the second elastic element 3, so that the second elastic element 3 is vertically nested within the first elastic element 2.

[0023] For details, please refer to Figure 3 In this embodiment, the central axis of the annular trajectory of the first elastic element 2 is composed of multiple arc segments on both sides. In the figure, the multiple arc segments are θ1 to θ2 respectively from the first curve segment to the second curve segment. 14 , θ represents radians, and the relationship is: θ1=2θ3, θ2=2.1θ1, θ4=2.4θ1, θ1=3.5θ5, θ6=1.4θ1, θ7=4.7θ1, θ8=1.5θ1, θ1=6θ9, θ 10 =1.5θ1, θ 11 =4.8θ1, θ 12 =2θ1,θ 13 =1.2θ1.

[0024] For the first elastic element 2, the span dimension of its first curved segment is L1, the span dimension of its second curved segment is L3, and the span dimension of the middle recess is L2. The dimensional relationship is L1=1.6L2=1.2L3.

[0025] For the second elastic element 3, its dimensional relationship is as follows: L1=L4+t3, L2=L5+t3, L3=L6+t3, h1=h4+t3, h2=h5+t3, t3=1.5t1, where t1 represents the thickness of the first elastic element 2, t3 represents the thickness of the second elastic element 3, h1 represents the height of the first curved segment of the first elastic element 2, h2 represents the height of the second curved segment of the first elastic element 2, h4 represents the height of the first curved segment of the second elastic element 3, h5 represents the height of the second curved segment of the second elastic element 3, L4 represents the span dimension of the first curved segment of the second elastic element 3, L5 represents the span dimension of the middle recess of the second elastic element 3, L6 represents the span dimension of the second curved segment of the second elastic element 3, and the width of the elastic element is d1.

[0026] Preferably, both elastic elements are symmetrical about their own central axis.

[0027] For preferred options, please refer to [link / reference]. Figure 5 Multiple grooves are provided on the inner side of the constraint ring 4 for engaging with the recess of the elastic element. The number of grooves is twice the number of elastic elements. In this embodiment, the relationship between the groove width h6 and the thickness d1 of the elastic element is h6=d1. In the figure, R1 represents the diameter of the circular boundary where the groove is located, R2 represents the inner diameter of the constraint ring 4, and R3 represents the outer diameter of the constraint ring 4. The dimensional relationship between the second elastic element 2 and the constraint ring 4 is: L1=2.5R1.

[0028] like Figure 6-7 As shown, in order to apply the above-mentioned energy-absorbing unit, the present invention also proposes a butterfly-shaped multi-form compressive energy-absorbing structure, including at least one of the above-mentioned energy-absorbing units, and further including a first inlay structure 1 and a second inlay structure 5. The first inlay structure 1 is used to connect with the first curved segment of the elastic member, and the second inlay structure 5 is used to connect with the second curved segment of the elastic member.

[0029] This embodiment can establish different structural models based on the energy absorption unit to suit different application scenarios and application requirements.

[0030] Preferably, the surface of the first inlay structure 1 is provided with a set of slots for fitting the first curved segment of the elastic member, the surface of the second inlay structure 5 is provided with an insertion hole, and the second curved segment of the elastic member is provided with a support rod that mates with the insertion hole. Figure 3 In the diagram, t2 represents the width of the support rod, and h3 represents the height of the support rod.

[0031] Preferably, the inlay structure is a pair of parallel plates.

[0032] For further details, please refer to Figure 6-7When the inlay structure is a flat plate, the slot assembly includes slot units in multiple directions. Each slot unit is used to fit the first curved segment of the elastic element at different angles. The length of the insertion hole is h6, the width is t4, and the depth is d3. The relationship between the insertion hole and the width and height of the support rod is h6=d1 and t4=t3, respectively. The longitudinal and transverse spacing between the slots are h7 and L7, respectively. The slot unit can fit with the upper surface of the elastic element. The relationship between the width h8 of the slot unit and the width d1 of the elastic element is h8=d1. In addition, the length of the slot unit is L. 10 The depth is d5, the spacing between the slot units is L9, and the width of the first inlay mechanism 1 is L. 11 The thickness is d4, and the width of the second inlay mechanism 5 is L8, and the thickness is d2.

[0033] The dimensional relationship between the elastic element and the inlay structure is: L1≤L 10 +h6, L1≤L7+t4.

[0034] like Figure 11 The image shown is of the actual object, in which the energy-absorbing structure includes nine energy-absorbing units and two embedded structures.

[0035] Example 2

[0036] like Figure 12 As shown, the performance of the energy-absorbing structure is verified. In this embodiment, the energy-absorbing structure includes one energy-absorbing unit and two embedded structures, and the results are as follows. Figure 12 As shown, its parameters are: L1=71mm, L2=44.3mm, L3=59.1mm, L4=69mm, L5=42.3mm, L6=57.1mm, L7=69mm, L8=216mm, L9=68mm, L 10 =215mm, L 11 =217mm, t1=1mm, t2=3mm, t3=1.5mm, t4=3mm, h1=25mm, h2=13mm, h3=8mm, h4=24.6mm, h5=12.3mm, h6=10mm, h7=6 2mm, h8=10mm, d1=10mm; d2=3mm, d3=2mm, d4=1mm, d5=1.5mm, R1=28.2mm, R2=26.7mm, R3=29.7mm, θ1=0.274rad.

[0037] Based on simulation results, during the compression deformation process, the support rod first compresses inward to the middle of the second curved segment of the first elastic element 2, causing it to deform and absorb energy. Then, with continued compression, the second curved segment of the first elastic element 2 contacts and deforms with the second inlaid structure 5, absorbing energy again. Next, the first curved segment of the elastic element indents towards the center and contacts the top plate, deforming and absorbing energy. Finally, the first and second curved segments continue to deform and absorb energy until they become dense. The compression curves of force and displacement show that this structure has a gentle energy-absorbing plateau and good energy absorption performance.

[0038] Example 3

[0039] like Figure 8-10 As shown, unlike Embodiment 1, in this embodiment, the inlay structure is a pair of concentric cylinders, and the diameter of the first inlay structure 1 is larger than that of the second inlay structure 5.

[0040] In this embodiment, except for the following parameters, all other parameters common to the energy-absorbing unit and the inlay structure are the same as those in Embodiment 1: In this embodiment, the dimensions of the first inlay structure are inner diameter R4=97.4mm, outer diameter R5=99.4mm, and height d6=71mm; the depth of the slot unit is 1mm. The dimensions of the second inlay structure circle are: inner diameter R6 = 43.2 mm, outer diameter R7 = 46.2 mm, and height d7 = 60 mm.

[0041] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A butterfly-shaped multi-form pressure-resistant energy-absorbing unit, characterized in that, It includes a constraint ring (4) and at least two elastic elements. The elastic elements are ring-shaped structures, and their ring-shaped trajectories include a first curved segment and a second curved segment that are connected in an enclosing manner. The connection between the first curved segment and the second curved segment is concave inward. Each elastic element is coaxial and nested with each other. The constraint ring (4) is sleeved on the outside of the concave part of each elastic element.

2. The butterfly-shaped multi-form pressure-resistant energy-absorbing unit according to claim 1, characterized in that, The elastic element has two parts, including a first elastic element (2) and a second elastic element (3), and the planes on which the annular trajectories of the two elastic elements lie are perpendicular to each other.

3. The butterfly-shaped multi-form pressure-resistant energy-absorbing unit according to claim 2, characterized in that, The annular trajectory of the first elastic element (2) is obtained by equidistant magnification of the annular trajectory of the second elastic element (3), so that the second elastic element (3) is vertically nested inside the first elastic element (2).

4. The butterfly-shaped multi-form pressure-resistant energy-absorbing unit according to claim 2, characterized in that, Both elastic elements are symmetrical about their own central axis.

5. The butterfly-shaped multi-form pressure-resistant energy-absorbing unit according to claim 2, characterized in that, The inner side of the constraint ring (4) is provided with multiple grooves for engaging with the recesses of the elastic element. The number of grooves is twice the number of elastic elements.

6. A butterfly-shaped multi-morphological pressure-resistant energy-absorbing structure, characterized in that, It includes at least one energy-absorbing unit as described in any one of claims 1-5, and further includes a first inlay structure (1) and a second inlay structure (5), wherein the first inlay structure (1) is used to connect with the first curved segment of the elastic member, and the second inlay structure (5) is used to connect with the second curved segment of the elastic member.

7. The butterfly-shaped multi-morphological pressure-resistant energy-absorbing structure according to claim 6, characterized in that, The surface of the first inlay structure (1) is provided with a slot group for fitting the first curved segment of the elastic member, and the surface of the second inlay structure (5) is provided with an insertion hole. The second curved segment of the elastic member is provided with a support rod that cooperates with the insertion hole.

8. The butterfly-shaped multi-morphological pressure-resistant energy-absorbing structure according to claim 7, characterized in that, The inlay structure is a pair of parallel plates.

9. A butterfly-shaped multi-morphological pressure-resistant energy-absorbing structure according to claim 8, characterized in that, The slot assembly includes slot units in multiple directions, each slot unit being used to engage the first curved segment of the elastic element at different angles.

10. A butterfly-shaped multi-morphological pressure-resistant energy-absorbing structure according to claim 7, characterized in that, The inlay structure is a pair of concentric cylinders, and the diameter of the first inlay structure (1) is larger than that of the second inlay structure (5).

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