CN114771456A - Safety belt buffering, energy-absorbing and energy-consuming device for passenger collision safety protection - Google Patents
Safety belt buffering, energy-absorbing and energy-consuming device for passenger collision safety protection Download PDFInfo
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- CN114771456A CN114771456A CN202210477149.3A CN202210477149A CN114771456A CN 114771456 A CN114771456 A CN 114771456A CN 202210477149 A CN202210477149 A CN 202210477149A CN 114771456 A CN114771456 A CN 114771456A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/12—Construction of belts or harnesses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
- B60R2022/286—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Seats For Vehicles (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
A safety belt buffering, energy-absorbing and energy-consuming device for protecting the collision of passengers. The continuous deformation of the soft single cells in the soft metamaterial is used for buffering and absorbing the instantaneous high pressure of the safety belt to the human body during collision, and the soft metamaterial is formed by connecting a plurality of soft single cells similar in basic structure in series. The compliant cell bodies are divided into rigid rods and flexible sheets according to the deformation function. The rigidity pole includes safety belt back shaft and two lower safety belt back shafts, two stabilizing connecting rods, forms quadrangle structure after two lower safety belt back shafts and two stabilizing connecting rods 4 assemble. The flexible sheet comprises four deformable sheets with the same structure, and the upper safety belt supporting shaft and the two lower safety belt supporting shafts are fixedly connected in a pairwise mode. The invention can effectively and uniformly buffer the impact force brought to the passengers by the safety belt when being applied to the collision safety protection of the passengers of the automobile; the metamaterial composed of a plurality of unit cells can deal with collision accidents under different conditions; simple structure, stable performance and low cost.
Description
Technical Field
The invention belongs to the technical field of automobile safety, and relates to a safety belt buffering, energy absorbing and energy dissipating device for passenger collision safety protection.
Background
When the automobile collides, the kinetic energy dissipation of passengers mainly comprises two parts: a part of the energy dissipated by the occupant through deformation of the restraint system and deformation of the body trim, so-called occupant restraint energy; the other part is energy which is transmitted to the vehicle body by the occupant through the restraint system and consumed in the deformation process of the front part of the vehicle body, namely, so-called Ride-down energy. The above two energy distribution modes have a significant impact on occupant injury in the event of a collision. It is generally considered that the improvement of Ride-down efficiency as much as possible can improve occupant response while ensuring other portions and other indexes. The safety belt is used as an important component of a restraint system, and on the premise of meeting living space, the rigidity of the restraint system taking the safety belt as a main part is reduced as much as possible, so that the Ride-down efficiency is improved, the response of passengers is reduced, and the risk that the passengers are seriously injured is reduced.
When the harness system is relatively stiff, it provides better restraint protection, but is more likely to cause injury to the human body. Particularly in the case of a relatively high-speed collision, the reaction force of the safety belt to the human body may cause serious injuries including fractures and the like. The safety belt has the advantages that the instantaneous impact force applied to a human body by the safety belt in the collision of a vehicle body is reduced, and the better collision energy absorption characteristic, the better comfort and the better convenience are always a main idea of the design and development of the safety belt. The existing devices capable of improving the collision energy absorption characteristic of the safety belt are mainly force-limiting safety belts and air bag type safety belts, and the existing devices also have the energy absorption characteristic requirements such as strength, elongation and the like on the safety belt webbing.
The existing safety belt collision energy absorption device or mode has some defects and shortcomings, and mainly has the following problems:
(1) the protective effect is limited. For a force limiting safety belt, the torsion bar in the retractor is used for providing cushioning. When the tension of the safety belt reaches a set force limit value, the torsion bar triggers the rotation effect, and the woven belts which are released from the torsion bar can be used as buffer. The use of the force limiter can improve the buffering characteristic of the safety belt, so that the safety belt exerts more uniform restraining force on passengers, and the discomfort in use is reduced. But it has problems in that: 1) the safety belt is greatly influenced by a preset force limit value, and only plays a role in protection after the tension of the safety belt exceeds the value; 2) the safety belt has no energy dissipation function, and absorbed energy can be released to act on the passenger again; 3) the limiting value is too small or too large, and the protection effect is not good.
(2) The structure is complicated, the control mode is complicated, and the cost is higher. The protection effect of the airbag type safety belt is better than that of a common safety belt and a force limiting type safety belt, but the structural complexity and the cost are increased greatly, generally, the airbag type safety belt comprises a plurality of elements such as a gas generator and a sensor, and the control aspect is complex. The technology is limited by cost, is mostly in middle and high-end vehicle types, is not enough in popularization degree, and is difficult to install by a common user.
(3) The requirements for the webbing itself are mainly energy absorption indicators such as strength, elongation, etc., which are basically standardized and are largely the same as or different from each other before the energy absorption webbing material is newly developed. It is worth noting that for certain types of seat belt webbing, the stiffness thereof cannot be dynamically adjusted according to the crash situation, resulting in unstable cushioning effect. In addition, most of the energy absorbed by the seatbelt webbing is not dissipated, but is released to the occupant again, which is likely to cause multiple injuries.
In summary, the ideal seat belt restraint system should have the following two functional features: 1) the buffer function can be used for homogenizing the pressure of the safety belt on the body of the passenger and reducing the response of the passenger, and mainly reducing the instantaneous acceleration of the passenger; 2) the energy absorption and consumption function is that the energy absorption and consumption function can absorb part of kinetic energy of the passenger caused by collision and fully or partially dissipate the kinetic energy so that the kinetic energy cannot be applied to the passenger again.
It is possible to improve the energy absorption characteristics of the seat belt from the structural point of view. The metamaterial has special properties which are not possessed by natural materials, and the properties are derived from artificial special structures. The flexible multistable mechanism has unique advantages in the aspect of buffering energy absorption, and comprises the advantages of simple structure, convenience in manufacturing, remarkable energy absorption effect and the like.
Disclosure of Invention
The application provides a safety belt buffering, energy-absorbing and energy-consuming device for passenger collision safety protection. The device utilizes the continuous deformation of the flexible single cells in the flexible metamaterial to buffer and absorb the instantaneous high pressure of the safety belt on the human body during collision, so that the pressure of the safety belt on the chest and the abdomen of the human body is reduced while the effective restraint of the safety belt on the human body is ensured, and the buffer effect is achieved. The invention can also absorb the energy generated by collision and dissipate all or part of the energy, namely, the energy absorption and dissipation effects are achieved.
The rigidity characteristic and the energy absorption threshold value of the flexible single cell body can be adjusted by changing the parameters such as the material, the structure and the like of the flexible single cell body. The energy absorption threshold is that when the absorbed energy reaches a certain value, the energy is dissipated, and the structure loses the capability of continuously absorbing the energy. Furthermore, the metamaterial can be formed by serially connecting the flexible single cells with different parameters according to a certain sequence, and the whole structure of the metamaterial covers a plurality of rigidity characteristics and energy absorption threshold values, so that the metamaterial can cope with various collisions with different degrees. The automobile safety belt can be additionally arranged on a common automobile safety belt according to requirements, has the characteristic of modularization, and is simple in structure, convenient to disassemble and assemble, high in reliability, stable in performance and low in cost.
In order to realize the invention, the technical scheme adopted by the application is as follows:
the safety belt buffering, energy absorbing and energy dissipating device utilizes the continuous deformation of the compliant single cells in the compliant metamaterial to buffer and absorb the instantaneous high pressure of the safety belt to a human body during collision. The compliant metamaterial is formed by serially connecting a plurality of compliant single cells with similar base structures according to a certain sequence.
The flexible cell body can be divided into a rigid rod and a flexible sheet 3 according to the deformation function. The rigid rod comprises an upper safety belt supporting shaft 1 and two lower safety belt supporting shafts 2 with the same structure, wherein the upper safety belt supporting shaft 1 and the two lower safety belt supporting shafts 2 are parallel to each other and arranged in a shape like a Chinese character 'pin', namely the upper safety belt supporting shaft 1 is positioned at the middle upper part of the plane where the two lower safety belt supporting shafts 2 are positioned. The rigid rod still include two stable connecting rod 4 that the structure is the same, every stable connecting rod 4 both ends all are equipped with the through-hole that is used for connecting 2 tip of safety belt back shaft down, form the parallelogram structure after two safety belt back shafts 2 and two stable connecting rod 4 assemble. The flexible sheets 3 comprise four deformable sheets with the same structure, the two deformable sheets are in group and are respectively fixed at two ends of the upper safety belt supporting shaft 1, the other ends of the four flexible sheets 3 are fixed on the lower safety belt supporting shaft 2, namely the four flexible sheets 3 are in group and are used for respectively fixedly connecting the upper safety belt supporting shaft 1 with the two lower safety belt supporting shafts 2, and thus the two flexible sheets 3 in the same plane, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2 form a quadrangle. Furthermore, from the perspective of the end of the rigid bar, a triangular shape is formed between the upper belt support shaft 1, the lower belt support shaft 2, the flexible sheet 3 and the stabilizer link 4.
Further, the flexible sheet 3 may be a straight line, a broken line or a curved line, that is, the flexible sheet 3 may be an angularly curved sheet as a thin sheet, and may be abstracted from a straight line, a broken line or a curved line when viewed from the side.
Further, in each compliant cell body, the number of the flexible sheets 3 may be an even number greater than four, still arranged on both sides of the upper belt supporting shaft 1 in logical symmetry as described above. On the basis of the four flexible sheets, one flexible sheet can be additionally arranged in parallel along the normal direction of the original flexible sheet to form an eight-flexible-sheet structure.
Further, the width and length of the flexible sheet 3 are much larger than the thickness thereof, and the difference is generally more than 10 times.
Further, the connection relationship between the upper and lower seat belt support shafts 1 and 2 and the flexible sheet 3 of the compliant cell body can be realized by integral manufacturing, or can be realized by assembling after being manufactured respectively. The stabilizing connecting rod 4 is manufactured separately and then assembled with the upper and lower seat belt supporting shafts 1, 2 and the flexible sheet 3 which are integrally manufactured or assembled.
Further, it is contemplated that the deformation process may be accomplished by ensuring that the components are in a similar force relationship to each other regardless of the change in the shape of the components.
Furthermore, an included angle theta between the flexible sheet 3 and the stabilizing connecting rod 4 and geometric parameters (length, width and thickness) of the flexible sheet 3 can be used as regulating and controlling parameters for controlling buffering, energy absorption and energy consumption effects of the flexible cell body, namely regulating and controlling parameters of rigidity characteristics and energy absorption threshold values. The adjustment of these parameters is done before manufacture and is not adjustable after manufacture. In addition, the material of the flexible sheet is also one of the parameters for adjusting the stiffness characteristics and the energy absorption threshold.
Furthermore, each flexible single cell body has certain deformation energy absorption characteristics (namely rigidity characteristics and energy absorption threshold values) after the regulation and control parameters are set, and can be independently applied, but the deformation energy absorption characteristics are single and invariable. In order to enhance the effects of buffering, energy absorption and energy consumption, and enable the flexible single cells to have rigidity characteristics and energy absorption thresholds with wider margins, the flexible single cells with different rigidity characteristics and energy absorption thresholds can be connected in series to form a metamaterial containing a plurality of flexible single cells, so that the metamaterial can cope with collision conditions of different degrees. One of the characteristics of the metamaterial is that the deformation energy absorption characteristic of the metamaterial is not only influenced by the performance of each flexible unit cell, but also changed due to different arrangement and arrangement of each flexible unit cell. By respectively setting the parameters of the flexible single cells and arranging the flexible single cells in series according to a certain sequence, the reasonable arrangement of the stiffness characteristic and the energy absorption threshold value of the metamaterial can be realized. The series connection is realized by the following steps: a lower safety belt supporting shaft 2 is shared between two adjacent flexible single cells, and the stabilizing connecting rods 4 of the two flexible single cells are connected with the shared lower safety belt supporting shaft 2. Or other connection schemes or integrated manufacturing can be adopted to achieve the effect.
When the flexible cell body is installed and used, the safety belt needs to be simultaneously contacted with the surfaces of the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2, namely, the safety belt passes through the surfaces of the rigid rods in sequence according to the contact sequence of the lower safety belt supporting shaft 2, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2, and the safety belt continuously passes through quadrilateral areas respectively formed by the two flexible sheets and the upper safety belt supporting shaft and the lower safety belt supporting shaft in the process. When the safety belt is pulled tightly by force, the upper safety belt supporting shaft 1 is pressed by the safety belt and then moves towards the plane where the two lower safety belt supporting shafts 2 are located, and the four flexible sheets 3 are deformed accordingly. The force applied to the safety belt can be buffered, absorbed and consumed through the deformation of the flexible sheet 3. It should be noted that, in the case of connection of the devices described in the present application, the deformation of the flexible sheet causes the lower belt support shaft 2 connected thereto to rotate about the through hole of the latter in contact with the stabilizing link 4.
In use, the present invention acts as an attachment for a seat belt, requiring the correct installation of the seat belt to function. Specifically, the method comprises the following steps: when only one flexible single cell body exists, the safety belt continuously penetrates through the inner parts of two quadrangles formed by the upper safety belt supporting shafts 1 and 2 and the flexible sheets according to the contact sequence of the lower safety belt supporting shaft 2, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2, and the safety belt is still in contact with the surfaces of the rigid rods after installation. When the metamaterial is composed of a plurality of flexible cell bodies, the installation of the safety belt is similar to the process, only the safety belt continuously penetrates through the quadrilateral inside formed by all the upper and lower safety belt supporting shafts and the flexible sheets according to the contact sequence of the lower safety belt supporting shaft 2, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2, and the safety belt can be kept in contact with the surfaces of all the rigid rods after the installation is finished. In general, the invention is characterized by good installation in that the compliance unit is able to maintain good support for the seat belt and thereby transmit forces when the seat belt is stressed in tension. When the automobile collides and a human body rushes forwards to cause the safety belt body to generate instantaneous high tension, the safety belt is tightened to cause the upper safety belt supporting shaft to be stressed, and the flexible sheet 3 is driven to deform. The process of the flexible sheet 3 deformation is the process of buffering and energy absorption. Because the deformation process is irreversible, the absorbed energy is dissipated, thereby avoiding secondary damage to the passengers.
The invention has the beneficial effects that:
(1) the invention applies the compliance unit cell to the collision safety protection of the automobile passengers, can effectively and uniformly bring impact force to the passengers by the safety belt, and absorbs kinetic energy of the passengers. And the absorbed energy will be dissipated so that it cannot act on the occupant again.
(2) The single flexible unit cell can cope with limited collision accidents, and after the plurality of flexible unit cells form the metamaterial, the rigidity characteristic with wider tolerance value and an energy absorption threshold value can be realized, so that the metamaterial can cope with collision accidents under different conditions, and passengers can be protected better.
(3) In addition, the automobile safety belt can be additionally arranged on a common automobile safety belt according to requirements, has the characteristic of modularization, and is simple in structure, convenient to assemble and disassemble, high in reliability, stable in performance and low in cost.
Drawings
Fig. 1 is a schematic structural view of a compliance unit cell in a buffering, energy absorbing and energy dissipating device of an automobile safety belt.
Fig. 2 is a schematic view of the cooperative installation of a certain cell body of the automobile safety belt buffering, energy absorbing and energy dissipating device and the safety belt.
Fig. 3 is a schematic diagram of the working deformation of the core cell body of the automobile safety belt buffering, energy absorbing and energy dissipating device provided by the present application.
Fig. 4 shows an embodiment of eight flexible bent sheets used for the cell body of the buffering, energy-absorbing and energy-dissipating device of the safety belt of the vehicle.
Fig. 5 is a schematic view of the structure and composition of the metamaterial in the buffering, energy-absorbing and energy-dissipating device of the safety belt of the vehicle.
Fig. 6 shows an embodiment of a compliant metamaterial formed by three compliant unit cells in the buffering, energy absorbing and energy dissipating device of the automobile safety belt.
Fig. 7 is a schematic view of a specific installation of the buffering, energy absorbing and energy dissipating device of the safety belt of the present application.
In the figure, 1 upper belt support shaft, 2 lower belt support shaft, 3 flexible sheet, 4 stabilizing connecting rod, 5 belt, 51 belt D ring, 52 belt buckle, 53 belt anchor point, 6 buffer energy absorber.
Detailed Description
The following detailed description of the embodiments of the invention refers to the accompanying drawings.
The safety belt buffering, energy absorbing and energy dissipating device utilizes the continuous deformation of compliant metamaterial to buffer and absorb the instantaneous high pressure of the safety belt to human body in collision. The compliant metamaterial is formed by serially connecting a plurality of compliant single cells with similar base structures according to a certain sequence. The flexible cell body can be divided into a rigid rod and a flexible sheet 3 according to the deformation function. The rigid rod comprises an upper safety belt support shaft 1 and two lower safety belt support shafts 2 with the same structure, wherein the upper safety belt support shaft 1 and the two lower safety belt support shafts 2 are parallel to each other and are arranged in a shape like a Chinese character pin, namely the upper safety belt support shaft 1 is positioned at the middle upper part of the two lower safety belt support shafts 2. The rigid rod further comprises two stabilizing connecting rods 4 with the same structure, through holes used for connecting the end parts of the lower safety belt supporting shafts 2 are formed in the two ends of each stabilizing connecting rod 4, and the two lower safety belt supporting shafts 2 and the two stabilizing connecting rods 4 form a parallelogram structure. Stabilizing link 4 is located safety belt back shaft 2 both ends down respectively and will descend safety belt back shaft 2 to be connected, and two stabilizing link 4 and two lower safety belt back shafts have also constituted a parallelogram promptly. The flexible sheets 3 comprise four deformable sheets with the same structure, two groups of the deformable sheets are fixed at two ends of the upper safety belt supporting shaft 1 respectively, the other ends of the four flexible sheets 3 are fixed on the lower safety belt supporting shaft 2, namely, the upper safety belt supporting shaft 1 is fixedly connected with the two lower safety belt supporting shafts 2 respectively by two groups of the four flexible sheets 3, and thus the two flexible sheets 3 in the same plane, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2 form a quadrangle. Furthermore, the upper belt support shaft 1, the lower belt support shaft 2, the flexible sheet 3 and the stabilizer link 4 form a triangular shape when viewed from the end of the rigid bar.
Fig. 1 is a schematic view of a compliant cell structure of a vehicle seat belt buffering, energy absorbing and dissipating device according to the present invention. The performance of the flexible single cell body, namely the effects of buffering, energy absorption and energy consumption, is ensured by two parameters of the material and the structure. For convenience, the compliant structures referred to throughout this application are all made of the same material by default. It should be noted, however, that it is also contemplated to rationally arrange different materials for the compliant structure to coordinate with the adjustment of other structural parameters to achieve the adjustment of the overall performance. In terms of the structure of the flexible single cell body, the deformation threshold force can be adjusted by changing the included angle parameter theta between the flexible sheet 3 and the stable connecting rod 4, so that the expected deformation performance is obtained.
Fig. 2 is a schematic view of the cooperative installation of the compliant cell body and the seat belt of the automobile seat belt buffering, energy absorbing and energy dissipating device provided by the present application. When the flexible cell body is installed and used, the safety belt is simultaneously contacted with the surfaces of the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2, namely, the safety belt sequentially passes through the surfaces of the rigid rods according to the contact sequence of the lower safety belt supporting shaft 2, the upper safety belt supporting shaft 1 and the lower safety belt supporting shaft 2. When the safety belt is pulled tightly, the upper safety belt supporting shaft 1 generates a trend along with the movement of the safety belt after being pressed by the safety belt, and the four flexible sheets 3 are deformed accordingly. The force applied to the safety belt can be buffered, absorbed and consumed through the deformation of the flexible sheet 3. It should be noted that, the upper belt support shaft 1 moves towards the lower belt support shaft 2 in the process, and when the flexible sheet is deformed, the lower belt support shaft 2 connected with the flexible sheet is driven to rotate around the through hole of the lower belt support shaft contacting with the stabilizing connecting rod 4.
Fig. 3 is a schematic diagram of the metamaterial structure of the buffering, energy absorbing and energy dissipating device of the safety belt of the present application, which represents an embodiment. Specifically, the metamaterial is formed by sequentially connecting a plurality of flexible single cells with different parameters in series according to a diagram, and two adjacent flexible single cells share one lower safety belt supporting shaft 2. The upper and lower belt support shafts 1, 2 and the flexible sheet 3 of each compliant cell body are integrally manufactured, while the stabilizer link 4 is separately manufactured and participates in assembly through its end through-hole. After the manufacturing of the compliance unit cell bodies is finished, all parameters are determined and cannot be modified, but the metamaterial can adjust the overall buffering, energy absorption and energy consumption effects by reasonably arranging the number of the compliance unit cell bodies with different parameters and the connection sequence among the compliance unit cell bodies with different parameters. The connection sequence is the sequence of the flexible single cells with different parameters, who is adjacent to the flexible single cells or who shares the lower safety belt support shaft.
Fig. 4 is an embodiment of a compliance unit cell added flexible sheet in the automobile safety belt buffering, energy absorbing and energy dissipating device provided by the present application, and all the flexible sheets are bent sheets. In this embodiment, the upper and lower belt supporting shafts 1, 2 are still symmetrically provided with four pairs of eight flexible sheets 3 at both ends according to the above logic, and it can be understood that the four flexible sheet structures are obtained by adding four flexible sheets 3 in parallel along the normal direction of the flexible sheets 3 and then making corresponding changes to other connecting structures. Thus, the two flexible pieces 3 connected to the end of the lower belt support shaft 2 are parallel to each other, and four flexible pieces are connected to the upper and lower belt support shafts 1 and 2 in parallel in two "eight" shapes when viewed from the end of the belt support shaft.
Fig. 5 is a schematic view of the basic compliant cell body working deformation in the automotive seat belt cushioning, energy absorbing and energy dissipating apparatus of the present application. The device relies primarily on the deformation of the flexible sheet 3 to cushion, absorb and dissipate energy. When the safety belt is pulled tightly by force, the upper safety belt supporting shaft 1 moves towards the plane where the two lower safety belt supporting shafts are located along with the safety belt after being pressed by the safety belt, and the four flexible sheets 3 deform accordingly. The force applied to the safety belt can be buffered, absorbed and consumed through the deformation of the flexible sheet 3. As a specific embodiment, the deformation of the flexible sheet 3 causes the lower belt support shaft 2 connected thereto to rotate about the through hole of the latter in contact with the stabilizing link 4.
The above represents the basic compliant cell body deformation energy absorption process. In the metamaterial composed of a plurality of compliant unit cells, each compliant unit cell shows different rigidity characteristics and energy absorption threshold values due to different parameters. The low threshold value is easy to deform and can be used as a buffer, and conversely, the low threshold value is not easy to deform and can relatively absorb more energy. Thus, the whole system can well deal with different collision conditions.
Specifically, FIG. 6 represents an embodiment in which three compliant cells are connected in series by a common lower belt support shaft to form a compliant metamaterial. The detailed settings are as follows; 1) all the cell body materials are set to be 6061 aluminum materials; 2) setting all the lower safety belt supporting shafts to be cylindrical rigid rods with the diameter of 20mm and the length of 110mm, and enabling the lower safety belt supporting shafts to be spaced by 100 mm; 3) setting the upper safety belt support shaft to be a cylindrical rigid rod with the diameter of 20mm and the length of 90 mm; 4) setting the flexible sheets to be thin sheets with the thickness of 1.5mm and the width of 20 mm; 5) the connection of the flexible sheet and the upper and lower safety belt supporting shafts is completed through integrated manufacturing; 6) setting the stable connecting rod to be a rigid rod with the length of 120mm, the width of 20mm and the thickness of 5mm, wherein through holes with the inner diameter of 20mm are formed in two ends of the stable connecting rod and are used for being connected with the end parts of the two lower safety belt supporting shafts; 7) setting the included angle theta between the stable connecting rod and the flexible sheet in the flexible single cells 1, 2 and 31、θ2、θ330 degrees, 50 degrees and 40 degrees respectively. FIG. 7 shows a specific fitting manner of the compliant metamaterial and the safety belt.
The above-mentioned embodiments only represent the embodiments of the present invention, but they should not be understood as the limitation of the scope of the present invention, and it should be noted that those skilled in the art can make several variations and modifications without departing from the spirit of the present invention, and these all fall into the protection scope of the present invention.
Claims (7)
1. A safety belt buffering, energy-absorbing and energy-consuming device for passenger collision safety protection is characterized in that the safety belt buffering, energy-absorbing and energy-consuming device utilizes continuous deformation of a flexible single cell body in a flexible metamaterial to buffer and absorb instantaneous high pressure of a safety belt to a human body during collision; the compliant metamaterial is formed by serially connecting a plurality of compliant single cells with similar basic structures according to a certain sequence;
the flexible cell body can be divided into a rigid rod and a flexible sheet (3) according to the deformation function; the rigid rod comprises an upper safety belt support shaft (1) and two lower safety belt support shafts (2) with the same structure, wherein every two safety belt support shafts are parallel to each other and arranged in a shape like a Chinese character 'pin'; the rigid rod further comprises two stabilizing connecting rods (4) with the same structure, through holes for connecting the end parts of the lower safety belt supporting shafts (2) are formed in the two ends of each stabilizing connecting rod (4), and the two lower safety belt supporting shafts (2) and the two stabilizing connecting rods (4) are assembled to form a parallelogram structure; the flexible sheets (3) comprise four deformable sheets with the same structure, the upper safety belt supporting shafts (1) are fixedly connected with the two lower safety belt supporting shafts (2) in a pairwise mode, and the two flexible sheets (3) in the same plane, the upper safety belt supporting shafts (1) and the lower safety belt supporting shafts (2) form a quadrangle; from the end view of the rigid rod, a triangle is formed among the upper safety belt supporting shaft (1), the lower safety belt supporting shaft (2), the flexible sheet (3) and the stabilizing connecting rod (4);
when the flexible cell body is installed and used, the safety belt needs to be simultaneously contacted with the front surfaces of the upper safety belt supporting shaft (1) and the lower safety belt supporting shaft (2), and the safety belt continuously penetrates through quadrilateral areas respectively formed by the two flexible sheets and the upper and lower safety belt supporting shafts; when the safety belt is pulled tightly by force, the upper safety belt supporting shaft (1) moves towards the plane where the two lower safety belt supporting shafts (2) are located along with the safety belt after being pressed by the safety belt, and the four flexible sheets (3) deform along with the movement; the force borne by the safety belt is buffered, absorbed and consumed through the deformation of the flexible sheet (3); when the flexible sheet (3) deforms, the lower safety belt supporting shaft (2) connected with the flexible sheet is driven to rotate by taking the through hole in contact with the stable connecting rod (4) as a center.
2. The seatbelt buffering, energy absorbing and energy dissipating device for passenger crash safety protection as claimed in claim 1, wherein the compliant cells with different stiffness characteristics and energy absorption thresholds can be connected in series to form a metamaterial comprising a plurality of compliant cells to cope with different levels of crash conditions.
3. The seatbelt buffering, energy absorbing and energy dissipating apparatus for passenger crash safety protection according to claim 1, wherein said series connection is implemented by: a lower safety belt supporting shaft (2) is shared between two adjacent flexible single cells, and the stable connecting rods (4) of the two flexible single cells are connected with the shared lower safety belt supporting shaft (2); or be made integrally.
4. A belt buffering, energy absorbing and dissipating device for passenger crash safety protection according to claim 1, characterized in that the width and length of the flexible sheet (3) are greater than its thickness.
5. The seatbelt buffering, energy absorbing and energy dissipating device for passenger collision safety protection as claimed in claim 1, wherein the upper seatbelt supporting shaft (1), the lower seatbelt supporting shaft (2) and the flexible sheet (3) in the compliant cell body can be manufactured integrally or assembled separately.
6. The seatbelt buffering, energy absorbing and energy dissipating device for passenger crash safety protection as claimed in claim 1, wherein the included angle θ between the flexible sheet (3) and the stabilizing connecting rod (4), the material of the flexible sheet and the geometric parameters of the flexible sheet (3) are used as the controlling parameters for controlling the buffering, energy absorbing and energy dissipating effects of the compliant cell body, i.e. the stiffness characteristic and the energy absorbing threshold.
7. The seatbelt buffering, energy absorbing and energy dissipating device for passenger crash safety protection as claimed in claim 1, wherein the number of the flexible sheets (3) in each of the compliant cells is an even number greater than four, and is symmetrically disposed on both sides of the upper seatbelt supporting shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477149.3A CN114771456B (en) | 2022-05-03 | 2022-05-03 | Safety belt buffering, energy absorbing and energy consuming device for protecting collision safety of passengers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477149.3A CN114771456B (en) | 2022-05-03 | 2022-05-03 | Safety belt buffering, energy absorbing and energy consuming device for protecting collision safety of passengers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114771456A true CN114771456A (en) | 2022-07-22 |
| CN114771456B CN114771456B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210477149.3A Active CN114771456B (en) | 2022-05-03 | 2022-05-03 | Safety belt buffering, energy absorbing and energy consuming device for protecting collision safety of passengers |
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| Country | Link |
|---|---|
| CN (1) | CN114771456B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384010A (en) * | 2001-04-29 | 2002-12-11 | 王武生 | Safety belt with energy-absorbing and controlling functions |
| US20080054616A1 (en) * | 2006-08-30 | 2008-03-06 | Tk Holdings Inc. | Seat belt apparatus |
| CN201080169Y (en) * | 2007-08-23 | 2008-07-02 | 比亚迪股份有限公司 | Safety belt for motor vehicle passenger |
| CN204037508U (en) * | 2014-06-23 | 2014-12-24 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of car belt with energy snubber formula ribbon |
-
2022
- 2022-05-03 CN CN202210477149.3A patent/CN114771456B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384010A (en) * | 2001-04-29 | 2002-12-11 | 王武生 | Safety belt with energy-absorbing and controlling functions |
| US20080054616A1 (en) * | 2006-08-30 | 2008-03-06 | Tk Holdings Inc. | Seat belt apparatus |
| CN201080169Y (en) * | 2007-08-23 | 2008-07-02 | 比亚迪股份有限公司 | Safety belt for motor vehicle passenger |
| CN204037508U (en) * | 2014-06-23 | 2014-12-24 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of car belt with energy snubber formula ribbon |
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| Publication number | Publication date |
|---|---|
| CN114771456B (en) | 2023-08-29 |
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