Vibration damping structure, stabilizer bar damping ball, counterweight damping strip, bow plate damping plate and bow body damping structure

Abstract

This application relates to the field of vibration damping technology, disclosing a vibration damping structure, a balance bar vibration damping ball, a counterweight vibration damping strip, a bow plate vibration damping plate, and a bow body vibration damping structure. The vibration damping structure includes: a base, shaped as a regular tetrahedron; a cube circumscribed in the base; and two regular tetrahedrons circumscribed in opposite directions to form a star-shaped icosahedral structure. When applied to bow and arrow equipment, the vibration transmitted from the bow body can be dispersed into the vibration damping structure, which is relatively concentrated. Based on the geometric properties of the star-shaped icosahedral structure, the force can be dispersed in various directions. By connecting multiple vibration damping structures into a whole, the entire vibration can be decomposed and absorbed, resulting in better vibration damping performance.

Description

Technical Field

[0001] This application relates to the field of vibration reduction technology, such as a vibration reduction structure, a balance bar vibration reduction ball, a counterweight vibration reduction strip, a bow-shaped vibration reduction plate, and a bow-shaped vibration reduction structure. Background Technology

[0002] Shock-absorbing components in bows and arrows primarily absorb the vibrational energy generated when the bowstring is released through elastic materials (such as rubber, silicone, and polymers). The core principle is energy conversion, transforming the kinetic energy of the bow arm and bowstring into internal energy, which is then absorbed by the shock-absorbing material, reducing bow vibration.

[0003] Existing bow and arrow shock absorption structures typically employ a solid body structure. When subjected to impact, a solid body structure cannot effectively convert the shock into internal energy to absorb it. Some of the vibration is released back into the bow and arrow equipment due to elastic changes, causing the entire bow and arrow system to oscillate periodically. This process is slow to dissipate and results in poor shock absorption.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a shock-absorbing structure, a balance bar shock-absorbing ball, a counterweight shock-absorbing strip, a bow plate shock-absorbing sheet, and a bow body shock-absorbing structure to improve the shock absorption effect of archery equipment.

[0007] In some embodiments, the damping structure includes: a base in the shape of a regular tetrahedron; a cube circumscribed in the base; and two regular tetrahedrons circumscribed in the cube, wherein the two regular tetrahedrons are oriented in opposite directions to form a star-shaped icosahedron structure.

[0008] In some embodiments, the star-shaped icosahedral structure is an isotropic structure.

[0009] In some embodiments, each face of the star-shaped icosahedral structure is an isosceles triangle.

[0010] In some embodiments, each side of the star-shaped icosahedral structure has the same length.

[0011] In some embodiments, the stabilizer bar damping ball is formed by a plurality of damping structures arranged horizontally and vertically as described above.

[0012] In some embodiments, the stabilizer bar shock absorber ball includes: a sphere, with a first plane and a second plane respectively provided on both sides; the sphere is further provided with a diameter reduction structure, the diameter reduction structure extending circumferentially from the first plane to the spherical surface of the sphere; the first plane and the second plane are recessed into the sphere with threaded holes.

[0013] In some embodiments, the counterweight damping strip is formed by a plurality of damping structures arranged horizontally and vertically as described above.

[0014] In some embodiments, the counterweight damping strip is generally elongated, with grooves provided on the top and bottom surfaces.

[0015] In some embodiments, the bow-shaped damping sheet is formed by a plurality of damping structures arranged horizontally and vertically as described above.

[0016] In some embodiments, the bow shock-absorbing structure is formed by arranging a plurality of shock-absorbing structures as described above in a horizontal and vertical manner, which are used as fillers to fill the holes in the bow.

[0017] The damping structure, balance bar damping ball, counterweight damping strip, bow plate damping sheet, and bow body damping structure provided in this disclosure can achieve the following technical effects: When shock-absorbing structures are applied to bows and arrows, vibrations transmitted from the bow can be dispersed into these structures, creating a more concentrated force. Based on the geometric properties of this star-shaped icosahedral structure, the force can be distributed in various directions. By connecting multiple shock-absorbing structures into a unified whole, the entire vibration can be decomposed and absorbed, resulting in better shock absorption.

[0018] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is an ISO view of the shock-absorbing structure provided in the embodiments of this disclosure; Figure 2 This is a front view of the shock-absorbing structure provided in the embodiments of this disclosure; Figure 3 This is a top view of the shock-absorbing structure provided in the embodiments of this disclosure; Figure 4 This is a side view of the shock-absorbing structure provided in the embodiments of this disclosure; Figure 5This is an ISO view of the stabilizer bar shock absorber provided in the embodiments of this disclosure; Figure 6 This is a front view of the stabilizer bar shock absorber ball provided in an embodiment of this disclosure; Figure 7 This is an ISO view of the counterweight damping strip provided in the embodiments of this disclosure; Figure 8 This is a front view of the counterweight damping strip provided in the embodiments of this disclosure; Figure 9 This is an ISO view of the bow-shaped shock absorber provided in the embodiments of this disclosure; Figure 10 This is a front view of the bow-shaped shock absorber provided in the embodiments of this disclosure; Figure 11 This is an ISO view of the bow-shaped shock-absorbing structure provided in the embodiments of this disclosure; Figure 12 This is a front view of the bow-shaped shock-absorbing structure provided in the embodiments of this disclosure; Figure 13 This is a top view of the bow-shaped shock-absorbing structure provided in the embodiments of this disclosure; Figure 14 This is a side view of the bow-shaped shock-absorbing structure provided in the embodiments of this disclosure; Figure 15 This is a comparison curve of the shock-absorbing ball of the balance bar provided in this embodiment and the traditional rubber ball in terms of vibration absorption noise.

[0020] Figure label: 10. Vibration damping structure; 11. Matrix; 12. Cube; 13. Tetrahedron; 20. Stabilizer bar shock absorber ball; 21. Sphere; 22. Reduced diameter; 23. Threaded hole; 24. First plane; 25. Second plane; 30. Counterweight shock absorber strip; 31. Groove; 40. Bow-shaped shock absorber; 41. Disc-shaped body; 42. Base; 50. Bow-shaped shock absorption structure. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0027] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0029] Combination Figures 1 to 4As shown, this embodiment of the disclosure provides a vibration damping structure 10. The vibration damping structure 10 includes: a base 11, a cube 12, and two regular tetrahedrons 13. The base 11 is a right-angled tetrahedron. The cube 12 is circumscribed in the base 11. The two regular tetrahedrons 13 each have a 60° angle in each plane, totaling four angles. The two regular tetrahedrons 13 are circumscribed in the cube 12, and the two regular tetrahedrons 13 are opposite in orientation; that is, the bottom surface of one regular tetrahedron 13 is circumscribed in the bottom surface of the cube 12, and the bottom surface of the other regular tetrahedron 13 is circumscribed in the top surface of the cube 12. This forms a star-shaped icosahedral structure.

[0030] When the shock-absorbing structure 10 provided in this embodiment is applied to bow and arrow equipment, the vibration transmitted from the bow can be dispersed into the shock-absorbing structure 10, which is a relatively concentrated force. Based on the geometric properties of the shock-absorbing structure 10 as a star-shaped icosahedron, the force can be dispersed in various directions. By connecting multiple shock-absorbing structures 10 into a whole, the entire vibration can be decomposed and absorbed, resulting in a better shock absorption effect.

[0031] Optionally, the star-shaped icosahedral structure is an isotropic structure with the same mechanical properties in all directions, thus it can dissipate and absorb vibrations in specific directions.

[0032] Alternatively, each face of the star-shaped icosahedral structure is an isosceles triangle.

[0033] Optionally, each side of the star-shaped icosahedral structure has an equal length. Depending on the specific component to which the damping structure 10 is applied, the side lengths are set differently, ranging from 1 mm to 10 mm.

[0034] Alternatively, the star-shaped icosahedral structure can be formed using 3D printing, resulting in a lighter printed structure.

[0035] The method for obtaining this star-shaped icosahedral structure is as follows: Define the proportion φ (phi): φ = (1 + ) / 2 ≈ 1.618 Let the coordinates of the vertices of the three rectangles be as follows: A rectangle in the XY plane (with the Z-axis as the normal): (±φ, ±1, 0) A rectangle in the XZ plane (with the Y-axis as the normal): (±φ, 0, ±1) A rectangle in the YZ plane (with the X-axis as the normal): (0, ±φ, ±1) The set of all vertices is the union of the three sets of coordinates above. Due to the combination of positive and negative signs, each rectangle has 4 vertices, and the three rectangles have a total of 12 unique vertices. These 12 vertices constitute the entirety of this star-shaped icosahedral structure.

[0036] One face of the star-shaped icosahedral structure can be expressed by a formula as follows: A triangular face can be defined by the following patterns: (aφ, b, 0), (a, 0, c), (0, aφ, c).

[0037] Where a, b, c ∈ {+1, -1}, and the sign of a determines the "quadrant" in which the surface is located.

[0038] Since the symbols a, b, and c can independently take positive or negative values, and the three axes (X, Y, Z) can rotate, this pattern can generate a total of 2 3 * 3 = 24 triangular faces.

[0039] Vertex set V (12): V = { (±φ, ±1, 0), (±φ, 0, ±1), (0, ±φ, ±1)} Face set F (24 triangular faces): For each a, b, c ∈ {-1, +1}, and for each dominant axis d ∈ {X, Y, Z}, generate a face.

[0040] Taking d = X as an example, the three vertices of the face are:

[0041] d = Y, which is then transformed into:

[0042] d = Z, rotating as follows:

[0043] It should be noted that there are several equivalent forms of rotation here, and the above rotation method is only one of them.

[0044] The star-shaped icosahedral structure generated using the above method is as follows: Figure 1 As shown.

[0045] Based on the aforementioned damping structure 10, combined with Figure 5 and Figure 6As shown, this embodiment of the present disclosure provides a stabilizer bar shock absorber ball 20, which is formed by a plurality of shock absorber structures 10 arranged horizontally and vertically. Optionally, the stabilizer bar shock absorber ball 20 includes: a ball 21, with a first plane 24 and a second plane 25 respectively provided on opposite sides of the ball 21, the first plane 24 and the second plane 25 being circular. A diameter reduction structure 22 is provided on one side of the ball 21, the diameter reduction structure 22 extending circumferentially from the first plane 24 to the spherical surface of the ball 21, such that the diameter of the first plane 24 near the diameter reduction structure 22 is smaller than the diameter of the second plane 25. The first plane 24 and the second plane 25 are recessed into the inner side of the ball 21 with threaded holes 23, which can be assembled to bow and arrow equipment by cooperating with screws.

[0046] Based on the aforementioned damping structure 10, combined with Figure 7 and Figure 8 As shown, this embodiment of the disclosure provides a counterweight damping strip 30, which is formed by arranging multiple damping structures 10 horizontally and vertically. Optionally, the counterweight damping strip 30 is generally elongated, and the top and bottom surfaces of the counterweight damping strip 30 are respectively provided with grooves 31. The counterweight damping strip 30 can be mounted onto bow and arrow equipment through the grooves 31.

[0047] Based on the aforementioned damping structure 10, combined with Figure 9 and Figure 10 As shown, this embodiment of the present disclosure provides a bow slat damping plate 40, which is formed by arranging a plurality of damping structures 10 horizontally and vertically. Optionally, the bow slat damping plate 40 includes a disc-shaped body 41, and a base 42 is provided at the bottom of the disc-shaped body. The bow slat damping plate 40 can be mounted on bow and arrow equipment via the base 42.

[0048] Based on the aforementioned damping structure 10, combined with Figures 11 to 14 As shown, this embodiment of the disclosure provides a bow-shaped shock-absorbing structure 50, which is formed by arranging a plurality of shock-absorbing structures 10 horizontally and vertically. The shape of the bow-shaped shock-absorbing structure 50 can match the shape of the holes in the bow, and it is filled into the holes as a filler to absorb vibrations.

[0049] Taking the stabilizer bar damping ball 20 as an example, the design and manufacturing method of the stabilizer bar damping ball is as follows: Step 1: Determine the design geometry: The dimensions and shape of the shock-absorbing ball 20 were determined using CAD software, and a solid model was created. Step 2: Draw the structure of a single unit in CAD software: Adjust the size and density of the star-shaped icosahedral structures, and connect multiple star-shaped icosahedral structures into a single entity through horizontal and vertical line arrangements. Perform a Boolean union operation on this entity and the entity drawn in step 1 to obtain the following result: Figure 5 The model shown; Step 3: Export the 3D model file, import the file into slicing software (such as Cura), slice the model to obtain data that can be used for 3D printing and programs for production processing; Step 4: Use 3D printing materials such as TPU-95A, TPU-90, and TPU-85 for production. The material is shaped on a 3D printer and then polished to obtain the final product.

[0050] As shown in Table 1, compared with the density of traditional solid silicone, the weight of the star-shaped icosahedral structure printed using the above material is reduced by at least 50%, as detailed in the table below:

[0051] A comparison of theoretical numerical calculations and damping effects between traditional rubber balls and the balance bar damping ball 20 provided in this embodiment: For traditional solid rubber balls: The shock-absorbing component, made of a solid rubber ball, exhibits a linear elastic stress-strain relationship when subjected to arrow vibrations. During each shot, the maximum stress on the shock-absorbing component is F = 50 N; therefore, the maximum stress σ is... max =1×10⁴ Pa. According to Hooke's law σ=Eε, the maximum strain can be obtained as: ; The energy absorbed by the solid rubber ball during vibration can be calculated using the strain energy formula: ; Assuming the volume of the shock-absorbing component ,but ; Regarding the vibration damping structure provided in this embodiment: In the working environment of a bow and arrow, the impact force is assumed to be F = 50N. The shock absorption structure uses TPU material. The following is the formula calculation process: The calculation is approximated using a spring model. The structural coefficient is taken as 0.1 to 0.3, the cross-sectional area of ​​the unit rod is taken as 0.5 mm², and the rod length is taken as 10 mm.

[0052] Calculate stiffness: k = 0.2 × (10 × 10^6) × ( (0.5 × 10^{-6}) / (10 × 10^{-3}) ) = 0.2 × 10^7 × 5 × 10^{-5} = 1000 N / m Solve for the deformation: Δx = F / k = 50 / 1000 = 0.05 m = 5 mm Calculate the energy absorbed: W = (1 / 2) × k × Δx²= (1 / 2) × 1000 × (0.05)² = 0.5 × 1000 ×0.0025=1.25 J The final result is that, under a force of 50N, the balance bar shock absorber ball 20 provided in this embodiment absorbs approximately 1.25 joules of energy, which is superior to the vibration absorption effect of traditional solid rubber balls.

[0053] A comparison of vibration absorption noise between traditional rubber balls and the balance bar shock-absorbing ball 20 provided in this embodiment: Experimental setup: A measurement point was set 50 cm away from the arrow, in the opposite direction of the arrowhead. The effects of different materials used for damping balls 20 on noise were recorded. The data are as follows: like Figure 15 The image shows two peaks. The first peak corresponds to the shape of the solid rubber ball when it is launched from the bow and arrow. The second peak is the sound image of the shock-absorbing ball 20 with the balance bar provided in this embodiment during launch. The upper first image is the loudness diagram, and the lower second image is the amplitude diagram.

[0054] As can be clearly seen from the figure, the value of the second peak is significantly lower than that of the first, thus indicating that the balance bar damping ball 20 provided in this embodiment is better at absorbing vibration.

[0055] Five launches were conducted using a traditional solid rubber ball and the balance bar shock-absorbing ball 20 provided in this embodiment, respectively. The data are shown in the table below:

[0056] The experimental results show that the balance bar damping ball 20, made of a star-shaped icosahedron, reduces noise by an average of 4.4 decibels during launch, demonstrating a significant advantage in damping effect.

[0057] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A shock absorbing structure, characterized by, include: The matrix is ​​a right-angled tetrahedron; A cube, externally circumscribed in the substrate; Two regular tetrahedrons are circumscribed in the cube, and the two regular tetrahedrons are oriented in opposite directions to form a star-shaped icosahedral structure.

2. The damping structure according to claim 1, characterized in that, The star-shaped icosahedral structure is an isotropic structure.

3. The damping structure according to claim 1, characterized in that, Each face of the star-shaped icosahedron structure is an isosceles triangle.

4. The damping structure according to claim 1, characterized in that, The length of each side of the star-shaped icosahedral structure is equal.

5. A shock-absorbing ball for a balance bar, characterized in that, It is formed by arranging multiple damping structures as described in any one of claims 1 to 4 in a horizontal and vertical manner.

6. The balance bar damper ball of claim 5, wherein, include: A sphere, with a first plane and a second plane on each side; The sphere is also provided with a diameter reduction structure, which extends circumferentially from the first plane to the spherical surface of the sphere; The first plane and the second plane are recessed into the sphere and have threaded holes.

7. A counterweight shock absorber strip, characterized in that, It is formed by arranging multiple damping structures as described in any one of claims 1 to 4 in a horizontal and vertical manner.

8. The counterweight damping strip according to claim 7, characterized in that, The counterweight damping strip is long and narrow, with grooves on its top and bottom surfaces.

9. A type of bow-leaf damping sheet, characterized in that, It is formed by arranging multiple damping structures as described in any one of claims 1 to 4 in a horizontal and vertical manner.

10. A bow-shaped shock-absorbing structure, characterized in that, The structure is formed by arranging multiple shock-absorbing structures as described in any one of claims 1 to 4 in a horizontal and vertical manner, and is used as filler to fill the holes in the bow body.

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