阅读说明：本技术 反手性结构及吸能缓冲结构、汽车车身 (Anti-hand structure, energy-absorbing buffer structure and automobile body ) 是由 李昆塬 张勇 黄文臻 刘晓颖 李吉祥 于 2020-06-24 设计创作，主要内容包括：本发明公开了反手性结构及吸能缓冲结构、汽车车身,反手性单元具有旋转负泊松比结构,在承载过程中通过韧带将受力传导至节圆上,使得节圆具有旋转的趋势,同时会把韧带卷起,形成压缩截面缩小,拉伸截面增大的负泊松比状态。当韧带变形结束后,节圆与节圆进行挤压,此时进入第二个变形阶段,由于三个反手性单元分别位于三维坐标中三个相互垂直的平面内,且三个节圆均相交连接共形成六个连接点,使得该混合手性结构在受到撞击时三个节圆不容易错位或变形,整体结构稳定,使得其承载能力和能量吸收能力较强。(The invention discloses an anti-hand structure, an energy-absorbing buffer structure and an automobile body, wherein an anti-hand unit is provided with a rotary negative Poisson ratio structure, stress is transmitted to a pitch circle through ligaments in a bearing process, so that the pitch circle has a rotary trend, and the ligaments are rolled up to form a negative Poisson ratio state with a reduced compression section and an increased stretching section. After ligament warp, pitch circle and pitch circle extrude, get into the second deformation stage this moment, because three anti-handedness unit is located three mutually perpendicular's in the three-dimensional coordinate plane respectively, and three pitch circle homogeneous phase cross connection forms six tie points altogether for this mixed chiral structure is difficult to the dislocation or is out of shape when receiving the striking, and overall structure is stable, makes its bearing capacity and energy absorption ability stronger.)

1. Anti-hand structure, its characterized in that: the anti-hand unit comprises a first anti-hand unit, a second anti-hand unit and a third anti-hand unit, wherein the first anti-hand unit comprises a first pitch circle and four first ligaments which are all in tangent connection with the first pitch circle, the second anti-hand unit comprises a second pitch circle and four second ligaments which are all in tangent connection with the second pitch circle, the third anti-hand unit comprises a third pitch circle and four third ligaments which are all in tangent connection with the third pitch circle, the first anti-hand unit is positioned in an XY plane, the second anti-hand unit is positioned in an XZ plane, the first pitch circle and the second pitch circle are in intersected connection and provided with two connection points, and the third anti-hand unit is positioned in a YZ plane, the third pitch circle, the first pitch circle and the second pitch circle are in intersected and provided with four connection points.

2. The anti-chiral structure of claim 1, wherein: the four first ligaments are arranged at intervals along the first pitch circle, two adjacent first ligaments are mutually vertical, and any one first ligament is parallel to the horizontal central line or the vertical central line of the first pitch circle; the four second ligaments are arranged at intervals along the second pitch circle in an annular manner, two adjacent second ligaments are mutually vertical, and any one second ligament is parallel to the horizontal central line or the vertical central line of the second pitch circle; the four third ligaments are arranged at intervals along the third segment of the circular ring, two adjacent third ligaments are mutually vertical, and any one third ligament is parallel to the horizontal central line or the vertical central line of the third segment of the circular ring.

3. The anti-chiral structure of claim 2, wherein: the first anti-handedness unit, the second anti-handedness unit and the third anti-handedness unit are all made of hollow pipes.

4. An energy absorbing and cushioning structure to which the inverse-handed structure of any one of claims 1 to 3 is applied, characterized in that: including four baffles of interval arrangement from top to bottom in proper order, be connected with a plurality of between two adjacent baffles and be the anti-manual structure that the array was arranged.

5. The energy absorbing bumper structure of claim 4, wherein: the thicknesses of the four partition plates are in gradient change.

6. The energy absorbing bumper structure of claim 4, wherein: in the anti-hand structure of the same array, the first pitch circle diameter D1, the second pitch circle diameter D2 and the third pitch circle diameter D3 of a plurality of anti-hand units are all the same, the first ligament length L1, the second ligament length L2 and the third ligament length L3 are all the same, and the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 are all the same; and the first pitch circle diameter D1, the second pitch circle diameter D2 and the third pitch circle diameter D3 of the anti-handedness units are all in gradient change in the anti-handedness structures of the three arrays; or, the three ligament lengths L1, L2, L3 all vary in gradient in the three arrays of anti-chiral structures; or, the three ligament thicknesses t1, t2, t3 all vary in a gradient across the three arrays of anti-chiral structures.

7. The energy absorbing structure of claim 4, wherein: the four partition plates are made of foamed aluminum materials.

8. Automotive body, its characterized in that: the energy absorbing structure of any one of claims 4 to 7 is applied.

Technical Field

The invention relates to a high-performance engineering structure, in particular to an anti-hand structure, an energy-absorbing buffer structure and an automobile body.

Background

The anti-hand structure is mainly characterized by having a rotary negative Poisson ratio structure.

As shown in fig. 1, two pitch circles on the same ligament are located on the same side of the ligament, and belong to an anti-chiral structure, and the anti-chiral structure is formed by sequentially connecting four anti-chiral units, and is annular.

However, in the existing anti-chiral structure, two adjacent units are only butted through two ligaments, and are easily dislocated or deformed when an external force is applied, so that the structural stability is poor, and the bearing capacity and the energy absorption capacity of the existing anti-chiral structure are poor.

Disclosure of Invention

The invention provides an anti-hand structure, an energy-absorbing buffering structure and an automobile body, which overcome the defects in the background art. One of the technical schemes adopted by the invention for solving the technical problems is as follows:

the anti-hand structure comprises a first anti-hand unit, a second anti-hand unit and a third anti-hand unit, wherein the first anti-hand unit comprises a first pitch circle and four first ligaments tangent to the first pitch circle, the second anti-hand unit comprises a second pitch circle and four second ligaments tangent to the second pitch circle, the third anti-hand unit comprises a third pitch circle and four third ligaments tangent to the third pitch circle, the first anti-hand unit is located in an XY plane, the second anti-hand unit is located in an XZ plane, the first pitch circle and the second pitch circle are intersected and connected and provided with two connection points, and the third anti-hand unit is located in a YZ plane, the third pitch circle, the first pitch circle and the second pitch circle are intersected and connected and provided with four connection points.

In a preferred embodiment: the four first ligaments are arranged at intervals along the first pitch circle, two adjacent first ligaments are mutually vertical, and any one first ligament is parallel to the horizontal central line or the vertical central line of the first pitch circle; the four second ligaments are arranged at intervals along the second pitch circle in an annular manner, two adjacent second ligaments are mutually vertical, and any one second ligament is parallel to the horizontal central line or the vertical central line of the second pitch circle; the four third ligaments are arranged at intervals along the third segment of the circular ring, two adjacent third ligaments are mutually vertical, and any one third ligament is parallel to the horizontal central line or the vertical central line of the third segment of the circular ring.

In a preferred embodiment: the first anti-handedness unit, the second anti-handedness unit and the third anti-handedness unit are all made of hollow pipes.

The second technical scheme adopted by the invention for solving the technical problems is as follows: the energy-absorbing buffer structure comprises four clapboards which are sequentially arranged at intervals from top to bottom, and a plurality of anti-hand structures which are arranged in an array are connected between every two adjacent clapboards.

In a preferred embodiment: the thicknesses of the four partition plates are in gradient change.

In a preferred embodiment: in the anti-hand structure of the same array, the first pitch circle diameter D1, the second pitch circle diameter D2 and the third pitch circle diameter D3 of a plurality of anti-hand units are all the same, the first ligament length L1, the second ligament length L2 and the third ligament length L3 are all the same, and the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 are all the same; and the first pitch circle diameter D1, the second pitch circle diameter D2 and the third pitch circle diameter D3 of the anti-handedness units are all in gradient change in the anti-handedness structures of the three arrays; or, the three ligament lengths L1, L2, L3 all vary in gradient in the three arrays of anti-chiral structures; or, the three ligament thicknesses t1, t2, t3 all vary in a gradient across the three arrays of anti-chiral structures.

In a preferred embodiment: the four partition plates are made of foamed aluminum materials.

The third technical scheme adopted by the invention for solving the technical problems is as follows: the automobile body is provided with the buffering and energy absorbing structure.

Compared with the background technology, the technical scheme has the following advantages:

1. the anti-hand unit has a rotary negative Poisson ratio structure, and stress is transmitted to the pitch circle through the ligament in the bearing process, so that the pitch circle has a rotary trend, and the ligament can be rolled up to form a negative Poisson ratio state with a reduced compression section and an increased tension section. After ligament warp, pitch circle and pitch circle extrude, get into the second deformation stage this moment, because three anti-handedness unit is located three mutually perpendicular's in the three-dimensional coordinate plane respectively, and three pitch circle homogeneous phase cross connection forms six tie points altogether for this mixed chiral structure is difficult to the dislocation or is out of shape when receiving the striking, and overall structure is stable, makes its bearing capacity and energy absorption ability stronger.

2. The connection states of the pitch circles and the ligaments in the three anti-chiral units of the anti-chiral structure are completely the same, so that the negative Poisson's ratio states of the three anti-chiral units are the same when the anti-chiral structure is subjected to an external force, and the bearing capacity and the energy absorption capacity of the anti-chiral structure are in a superposed state and cannot be mutually offset.

3. The first anti-chiral unit, the second anti-chiral unit and the third anti-chiral unit are all made of hollow tubes, so that the overall weight of the mixed chiral structure can be reduced, and the light weight is realized.

4. The energy-absorbing buffer structure adopts the anti-hand structure, can improve the energy-absorbing performance and the buffering effect, can be applied to the traffic industry such as automobiles, airplanes and the like, and can even be applied to the building structure to improve the anti-seismic effect and the noise elimination effect of the building.

5. The thicknesses of the four partition plates are in gradient change, the four partition plates have better energy absorption characteristics, and when impact energy passes through the partition plates with different thicknesses, the impact energy is absorbed by the layers, so that the impact energy is reduced, and the four partition plates have better buffer effect.

6. The first pitch circle diameter D1, the second pitch circle diameter D2 and the third pitch circle diameter D3 of the anti-hand unit are in gradient change in the anti-hand structure of the three arrays, so that the buffering effect can be improved, and further the bearing capacity and the energy absorption capacity of the whole structure are improved. The first ligament length L1, the second ligament length L2, and the third ligament length L3 of the anti-chiral units vary in gradient among the three arrays of anti-chiral structures; or the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 of the anti-hand unit are in gradient change in the anti-hand structures of the three arrays, so that the initial peak force of the energy-absorbing and buffering structure can be improved, and the buffering effect in collision can be improved.

7. The four partition plates are made of foamed aluminum materials and are made of light materials, so that the four partition plates have high specific strength and specific modulus and can improve the integral bearing capacity.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 shows an overall schematic diagram of an anti-chiral structure in the prior art.

Fig. 2 is a schematic diagram illustrating an overall structure of the first anti-chiral unit according to the present invention.

Fig. 3 is a schematic diagram illustrating the connection between the first anti-chiral unit and the second anti-chiral unit according to the present invention.

Fig. 4 is a schematic diagram illustrating the overall structure of the anti-chiral structure according to the present invention.

FIG. 5 is a perspective view of an energy absorbing bumper structure of the present invention.

FIG. 6 is a front view of an energy absorbing bumper structure of the present invention.

Detailed Description

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" and "fixedly connected" should be interpreted broadly, that is, any connection between the two that is not in a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having", and variations thereof, are intended to be inclusive and not limiting.

Referring to fig. 1 to 4, a preferred embodiment of the anti-handedness structure, which includes a first anti-handedness unit 10, a second anti-handedness unit 20, and a third anti-handedness unit 30, is shown.

The first anti-handedness unit 10 comprises a first pitch circle 11 and four first ligaments 12 which are all connected with the first pitch circle 11 in a tangent mode, the second anti-handedness unit 20 comprises a second pitch circle 21 and four second ligaments 22 which are all connected with the second pitch circle 21 in a tangent mode, the third anti-handedness unit 30 comprises a third pitch circle 31 and four third ligaments 32 which are all connected with the third pitch circle 31 in a tangent mode, the first anti-handedness unit 10 is located in an XY plane, the second anti-handedness unit 20 is located in an XZ plane, the first pitch circle 11 and the second pitch circle 21 are connected in an intersecting mode and provided with two connection points, and the third anti-handedness unit 30 is located in a YZ plane, the third pitch circle 31 and the first pitch circle 11 and the second pitch circle 21 are connected in an intersecting mode and provided with four connection points.

In this embodiment, as shown in fig. 2, four first ligaments 12 are arranged at intervals along the first pitch circle 11, and two adjacent first ligaments 12 are perpendicular to each other, and any one first ligament 12 is parallel to the horizontal central line or the vertical central line of the first pitch circle 11; the four second ligaments 22 are arranged at intervals along the second pitch circle 21, two adjacent second ligaments 22 are perpendicular to each other, and any one second ligament 22 is parallel to the horizontal central line or the vertical central line of the second pitch circle 21; four third ligaments 32 are arranged at intervals along the third pitch circle 31 and two adjacent third ligaments 32 are perpendicular to each other, and any one third ligament 32 is parallel to the horizontal or vertical center line of the third pitch circle 31. For the convenience of the following description, the inner diameters of the first pitch circle 11, the second pitch circle 21 and the third pitch circle 31 are respectively defined as D1, D2 and D3, the lengths of the first ligament 12, the second ligament 22 and the third ligament 32 are respectively defined as L1, L2 and L3, and the thicknesses of the first ligament 12, the second ligament 22 and the third ligament 32 are respectively defined as t1, t2 and t 3.

In this embodiment, the first anti-handedness unit 10, the second anti-handedness unit 20 and the third anti-handedness unit 30 are all made of hollow tubes. And the hollow tube sizes of the three anti-chiral units 10, 20 and 30 are the same, that is, the thicknesses and diameters of the three pitch circles 11, 21 and 31 are the same, and the lengths and thicknesses of all ligaments 12, 22 and 32 of the three anti-chiral units 10, 20 and 30 are the same. As shown in fig. 4, the three anti-chiral units 10, 20, and 30 are made of hollow square tubes with a wall thickness of 0.1 mm. Alternatively, the three anti-chiral units 10, 20, and 30 may be made of hollow round tubes, if necessary, but not limited thereto.

The anti-hand unit has a rotary negative Poisson ratio structure, and stress is transmitted to the pitch circle through the ligament in the bearing process, so that the pitch circle has a rotary trend, and the ligament can be rolled up to form a negative Poisson ratio state with a reduced compression section and an increased tension section. After ligament warp, pitch circle and pitch circle extrude, get into the second deformation stage this moment, because three anti-handedness unit is located three mutually perpendicular's in the three-dimensional coordinate plane respectively, and three pitch circle homogeneous phase cross connection forms six tie points altogether for this mixed chiral structure is difficult to the dislocation or is out of shape when receiving the striking, and overall structure is stable, makes its bearing capacity and energy absorption ability stronger.

Referring to fig. 5 and 6, a preferred embodiment of the energy absorption buffer structure is shown, which employs the above-mentioned anti-chiral structure, and includes four partition boards 40 sequentially arranged at intervals from top to bottom, and a plurality of anti-chiral structures arranged in an array are connected between two adjacent partition boards 40. As shown in fig. 5, the three arrays have the same anti-chiral structure, and are formed by stacking four rows and four columns of square arrays on top of each other. In order to make the connection between the partition 40 and the anti-chiral structure more firm and stable, it can be printed using 3D printing technology.

In this embodiment, the thicknesses T of the four partition plates 40 are changed in a gradient manner. For example, the thickness T of the four partition plates 40 from top to bottom may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm; alternatively, the thicknesses T of the four partition boards 40 from bottom to top may be 0.1 mm, 0.2 mm, 0.3 mm, and 0.4 mm, and may also be set by using other gradient change values, which is not limited to this. And the four clapboards are made of foamed aluminum materials.

In the embodiment, in the anti-chiral structure of the same array, the first pitch circle 11 diameter D1, the second pitch circle 21 diameter D2 and the third pitch circle 31 diameter D3 of the plurality of anti-chiral units are all the same, the length L1 of the first ligament 12, the length L2 of the second ligament 22 and the length L3 of the third ligament 32 are all the same, and the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22 and the thickness t3 of the third ligament 32 are all the same.

Wherein the diameter D1 of the first pitch circle 11, the diameter D2 of the second pitch circle 21 and the diameter D3 of the third pitch circle 31 of the anti-chiral units are all changed in a gradient manner in the anti-chiral structures of the three arrays; in the three arrays of anti-chiral structures, the first pitch circle 11 diameter D1, the second pitch circle 21 diameter D2 and the third pitch circle 31 diameter D3 of the anti-chiral structure of the uppermost array are all 6 mm, the first pitch circle 11 diameter D1, the second pitch circle 21 diameter D2 and the third pitch circle 31 diameter D3 of the anti-chiral structure of the middle array are all 7 mm, and the first pitch circle 11 diameter D1, the second pitch circle 21 diameter D2 and the third pitch circle 31 diameter D3 of the anti-chiral structure of the lowermost array are all 8 mm. Alternatively, the design can be reversed, but not limited to this.

The first ligament 12 length L1, the second ligament 22 length L2, and the third ligament 32 length L3 all vary in gradient in the three arrays of anti-chiral structures; for example, the length L1 of the first ligament 12, the length L2 of the second ligament 22, and the length L3 of the third ligament 32 of the overhand structure in the uppermost array are each 10 mm, the length L1 of the first ligament 12, the length L2 of the second ligament 22, and the length L3 of the third ligament 32 of the overhand structure in the middle array are each 15 mm, and the length L1 of the first ligament 12, the length L2 of the second ligament 22, and the length L3 of the third ligament 32 of the overhand structure in the lowermost array are each 20 mm. Alternatively, the design can be reversed, but not limited to this.

The first ligament 12 thickness t1, the second ligament 22 thickness t2, and the third ligament 32 thickness t3 all vary in a gradient in the three arrays of anti-chiral structures. For example, the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22, and the thickness t3 of the third ligament 32 of the opposite handed structure in the uppermost array are all 1 mm, the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22, and the thickness t3 of the third ligament 32 of the opposite handed structure in the middle array are all 1.5 mm, and the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22, and the thickness t3 of the third ligament 32 of the opposite structure in the lowermost array are all 2 mm. Alternatively, the design can be reversed, but not limited to this.

According to actual needs, in the anti-chiral structure of the three arrays, one parameter is changed in a gradient manner, and the other two parameters keep the same value; such as: the first 11, second 21, and third 31 pitch circle diameters D1, D2, D3 of the anti-handed units may individually vary in gradient in the three arrays of anti-handed structures, while the first 12, second 22, and third 32 ligament lengths L1, L2, and L3 of the anti-handed units maintain the same value in the three arrays of anti-handed structures, and the first 12, second 22, and third 32 ligament thicknesses t1, t2, t3 of the anti-handed units maintain the same value in the three arrays of anti-handed structures. Or, in an anti-chiral structure of three arrays, two of the parameters are changed in a gradient manner, and the other parameter keeps the same value; or, all parameter values of the energy absorption buffer structure can be subjected to gradient change at the same time, and the method is not limited to this.

The automobile body is provided with the buffering and energy absorbing structure. Such as the floor of an automobile, a crash structure, etc.

The energy-absorbing buffer structure is also applied to other transportation industries such as airplanes and the like, and can also be applied to the building industry, but not limited to the above.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.