Flexible energy-absorbing impact-resistant automobile anti-collision beam

Abstract

The invention relates to the technical field of automobile components, in particular to a flexible energy-absorbing impact-resistant automobile anti-collision beam which comprises a collision beam and bases symmetrically installed on an automobile body, buffers are arranged between the collision beam and the two bases, and each buffer comprises a supporting cylinder arranged on the corresponding base. A sliding cylinder connected with the collision beam is arranged in the supporting cylinder in a sliding mode. An anti-collision plate in the buffer can bear impact force firstly, the anti-collision plate can force a sliding rod to contract towards the interior of a supporting cylinder, the space of a first buffer cavity is continuously compressed and reduced, hydraulic oil flows into a second buffer cavity from the first buffer cavity through a plurality of connecting holes formed in a connecting ring, the hydraulic oil flows between the first buffer cavity and the second buffer cavity, and the hydraulic oil is prevented from flowing out of the first buffer cavity and the second buffer cavity. The impact energy is absorbed and dispersed under the combined action of the flow and volume change of the first buffer cavity and the second buffer cavity, the energy is gradually absorbed and dispersed in the flowing and volume change process, and the impact on a vehicle structure and passengers is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle components, and particularly to a flexible energy-absorbing and impact-resistant automotive bumper beam. Background Art

[0002] An automotive bumper beam is an important safety device at the front and rear of a vehicle. Its main function is to protect the structural integrity of the vehicle during a low-speed collision, reduce the vehicle's repair cost, and to a certain extent, protect the safety of the vehicle occupants. The bumper beam is usually made of high-strength steel and has a certain elasticity, capable of absorbing and dispersing the impact force during a collision.

[0003] The energy-absorbing and impact-resistant design is crucial for an automotive bumper beam. This design can significantly reduce the impact force transmitted to the passenger compartment during a collision, thereby reducing the risk of passenger injury. By deforming and absorbing energy through the bumper beam, it can effectively protect the vehicle occupants from direct impact. In addition, the impact-resistant bumper beam design can absorb most of the impact energy, reduce damage to other parts of the vehicle, and thus reduce the vehicle's repair cost.

[0004] Especially in a minor collision, if the bumper beam can absorb most of the energy, other parts of the vehicle may not need to be repaired or only require minor repairs. For example, the automotive energy-absorbing bumper beam with the publication number CN106080470A relates to the technical field of automotive energy-absorbing bumper beams. This prior art includes a bumper beam, bolt connection plates are respectively provided at both ends of the bumper beam, a tow hook is provided on the side wall of the bolt connection plate, left and right guide columns are provided on the side wall of the bumper beam, and springs are sleeved on the left and right guide columns. This prior art has a simple structure, is firmly and stably installed and used, and has good elasticity and energy-absorbing effect.

[0005] However, the above prior art still has some defects in terms of automotive anti-collision:

[0006] 1. In the above prior art, the front ends of the left and right guide columns are located in front of the rear bumper foam. During a collision, they will directly contact the impact force and transmit it to the bumper beam, which may lead to problems in the sequence of the energy-absorbing process. If the guide columns absorb most of the energy, then the rear bumper foam and the springs may not have enough opportunities to participate in the energy-absorbing process, resulting in insufficient buffering effect of the vehicle during a collision and increasing the risk of passenger injury.

[0007] 2. The above-mentioned prior art absorbs energy through buffering by means of foam and spring, and the energy absorption effect of foam and spring is not linear, which means that they may show different energy absorption characteristics under different impact forces. In some cases, this may lead to unstable energy absorption effect, especially head-on collision is a kind of traffic accident. In a head-on collision, the vehicle will be subjected to a large impact force, which can quickly cause damage to the vehicle structure and cause serious injury to the passengers. The foam material may reach a saturated state when absorbing energy, that is, after absorbing a certain amount of energy, its energy absorption capacity will decrease. The spring may also reach its maximum compression during the compression process, and then it will be unable to absorb further energy.

[0008] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for automobile anti-collision methods. Summary of the invention

[0009] In order to solve the above technical problems, the present application provides a flexible energy-absorbing and impact-resistant automobile anti-collision beam, which adopts the following technical solutions:

[0010] A flexible energy-absorbing and impact-resistant automobile anti-collision beam comprises a collision beam and bases symmetrically installed on a vehicle body, wherein a buffer is arranged between the collision beam and the two bases;

[0011] The buffer includes a supporting tube arranged on a base, a sliding tube connected to a collision beam is slidably arranged in the supporting tube, a plurality of flow holes are opened at one end of the sliding tube located in the supporting tube, a sealing plug is slidably arranged in the sliding tube, and a reset spring is arranged between the sealing plug and the collision beam.

[0012] Preferably, the buffer further comprises a sliding rod, the collision beam is slidably and symmetrically penetrated by the sliding rod, one end of the sliding rod is slid through the corresponding sealing plug and the sliding cylinder and then provided with a connecting ring, the connecting ring is provided with a plurality of connecting holes, and the end of the sliding rod away from the base is provided with an anti-collision plate;

[0013] A buffer chamber 1 is formed between the inner connecting ring of the support tube and the bottom of the sliding tube, and a buffer chamber 2 is formed between the inner connecting ring of the support tube and the bottom of the support tube.

[0014] Preferably, the sliding rod is provided with a limiting ring located in the sliding cylinder, and the return spring is located between the limiting ring and the sealing plug.

[0015] Preferably, a receiving hole is provided at the bottom of the sliding rod, a supporting rod is provided at the bottom of the supporting tube, a sliding disk connected to the supporting rod is slidably provided in the receiving hole, and a plurality of flow holes are provided on the sliding disk.

[0016] Preferably, annular sliding holes corresponding to the sliding cylinders one by one are formed in the collision beam, and the sliding cylinders are slidably connected to the annular sliding holes.

[0017] Preferably, a flexible energy absorber is provided on the collision beam;

[0018] The flexible energy absorber includes a buffer cylinder penetrating through the collision beam. A buffer rod is slidably arranged in the buffer cylinder. A protective plate is arranged at one end of the buffer rod. A sliding hole for the buffer cylinder to slide is formed in the collision beam.

[0019] Preferably, a partition ring is arranged in the buffer cylinder. The buffer rod is located within the partition ring. The buffer cylinder is divided into an inner cavity and an outer cavity by the partition ring from the inside to the outside. The partition ring is provided with a plurality of ventilation holes communicating the inner cavity and the outer cavity at the bottom of the buffer cylinder. An impact ring is slidably arranged in the outer cavity.

[0020] Preferably, a throttle disk is rotatably arranged at the bottom of the inner cavity through a torsion spring. Ventilation grooves corresponding to the ventilation holes one by one are formed in the throttle disk. An arc-shaped groove is formed in the throttle disk. A guiding inclined surface is arranged at the bottom of the arc-shaped groove.

[0021] A guiding hole is formed at one end of the buffer rod located within the buffer cylinder. A resisting rod corresponding to the guiding inclined surface is slidably arranged in the guiding hole. A resisting spring is arranged between the resisting rod and the bottom of the guiding hole.

[0022] Preferably, connection through holes corresponding to the ventilation holes one by one are formed in the throttle disk, and one end of the connection through hole communicates with the inner cavity. A one-way valve is arranged in the connection through hole.

[0023] Preferably, a buffer spring is arranged between the impact ring and the protective plate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. In the buffer of the present invention, the crash plate will first bear the impact force. The crash plate will force the sliding rod to contract into the support cylinder, continuously compressing and reducing the space of the first buffer cavity. The hydraulic oil flows from the first buffer cavity into the second buffer cavity through a plurality of connection holes formed in the connection ring. The flow of the hydraulic oil between the two first buffer cavities and the second buffer cavity, as well as the volume change of the first buffer cavity and the second buffer cavity, jointly act to absorb and disperse the impact energy. This process of flow and volume change enables the energy to be gradually absorbed and dispersed, reducing the impact on the vehicle structure and passengers.

[0026] 2. During the movement of the sliding rod in the buffer of the present invention, the sliding rod drives the limit ring provided thereon and located within the sliding cylinder, and the return spring is located between the limit ring and the sealing plug. The moving limit ring compresses the return spring, and the return spring provides an elastic force to the limit ring to prevent the sliding rod from moving excessively when subjected to an impact force, thereby avoiding damage or failure between system components. At the same time, the compressed return spring provides a greater elastic force to the sealing plug to slow down the flow of hydraulic oil into the sliding cylinder, further controlling the moving speed of the sliding rod, and thus more effectively absorbing and dispersing the impact energy.

[0027] 3. By enabling the ventilation hole to communicate with the outer cavity, the buffer of the present invention allows air to enter the outer cavity from the outside, then pushes the impact ring slidably arranged within the outer cavity, causing the impact ring to rush outwards and strike the protection plate to form a reaction force to counteract the original impact force, thereby reducing the energy transmitted to other parts of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention.

[0029] Figure 2 is a three-dimensional sectional view of the present invention.

[0030] Figure 3 is a sectional view of the buffer of the present invention.

[0031] Figure 4 is a schematic structural diagram of the buffer of the present invention.

[0032] Figure 5 is the present invention Figure 4 partial enlarged view of part A.

[0033] Figure 6 is a schematic structural diagram between the collision beam, impact-resistant plate and flexible energy absorber of the present invention.

[0034] Figure 7 is a schematic structural diagram of the flexible energy absorber of the present invention.

[0035] Figure 8 is a sectional view of the flexible energy absorber of the present invention.

[0036] Figure 9 is the present invention Figure 8 partial enlarged view of part B.

[0037] Figure 10 is a sectional view of the flow control disk of the present invention.

[0038] Description of reference numerals: 1, collision beam; 2, base; 3, buffer; 31, support cylinder; 32, sliding cylinder; 321, circulation hole; 322, sealing plug; 323, return spring; 33, sliding rod; 331, connecting ring; 332, connecting hole; 34, impact-resistant plate; 341, buffer pad; 35, first buffer cavity; 36, second buffer cavity; 37, limiting ring; 38, accommodation hole; 39, support rod; 391, sliding disc; 392, through-flow hole; 393, annular sliding hole; 4, flexible energy absorber; 41, buffer cylinder; 42, buffer rod; 421, protective plate; 422, sliding hole; 43, partition ring; 431, inner cavity; 432, outer cavity; 44, ventilation hole; 45, impact ring; 46, intercepting disc; 461, ventilation groove; 462, arc groove; 463, guiding inclined surface; 47, guiding hole; 471, resisting rod; 472, resisting spring; 48, connecting through hole; 481, one-way valve; 49, buffer spring. Detailed implementation manners

[0039] The following is Figures 1 to 10 a further detailed description of the present application.

[0040] The embodiment of the present application discloses a flexible energy-absorbing impact-resistant vehicle bumper beam, which absorbs and disperses impact energy through multi-layer buffering and energy absorption in stages, and at the same time compresses air by the absorbed impact force to form a reaction force to offset the original impact force, thereby reducing the energy transmitted to other parts of the vehicle.

[0041] Embodiment 1:

[0042] Referring to Figure 1 , a flexible energy-absorbing impact-resistant vehicle bumper beam includes a collision beam 1 and bases 2 symmetrically installed on the vehicle body. When a vehicle collision occurs, the buffers 3 provided between the collision beam 1 and the two bases 2 will gradually absorb energy, reducing the direct transmission of the impact force to the vehicle body, thereby protecting the vehicle structure and passenger safety.

[0043] Referring to Figures 2 to 4 , specifically, the buffer 3 includes a support cylinder 31 provided on the base 2, hydraulic oil is injected into the support cylinder 31, and a sliding cylinder 32 connected to the collision beam 1 is slidably arranged in the support cylinder 31, and sliding rods 33 are slidably and symmetrically penetrated through the collision beam 1.

[0044] When the car collides, the impact plate 34 set at the end of the sliding rod 33 away from the base 2 will first bear the impact force. The impact plate 34 will force the sliding rod 33 to shrink into the support tube 31, and drive one end of the sliding rod 33 to slide through the corresponding sealing plug 322 and the connecting ring 331 set behind the sliding tube 32, so that the connecting ring 331 moves into the support tube 31, and continuously compresses and reduces the space of the buffer cavity 1 35 formed between the connecting ring 331 in the support tube 31 and the bottom of the sliding tube 32. At the same time, the buffer cavity 2 36 formed between the connecting ring 331 in the support tube 31 and the bottom of the support tube 31 becomes larger as the buffer cavity 1 35 is reduced.

[0045] In this process, as the volume of buffer chamber 1 35 decreases, the hydraulic oil is compressed and the pressure increases, and the hydraulic oil flows from buffer chamber 1 35 into buffer chamber 2 36 through a number of connecting holes 332 opened on the connecting ring 331. The flow of hydraulic oil between the two buffer chambers 1 35 and buffer chamber 2 36, as well as the change in volume of buffer chamber 1 35 and buffer chamber 2 36, work together to absorb and disperse the impact energy. This process of flow and volume change allows the energy to be gradually absorbed and dispersed, reducing the impact on the vehicle structure and passengers.

[0046] When the collision plate 34 moves toward the collision beam 1, it will interfere with the buffer pad 341 provided between the collision beam 1 and the collision plate 34. The material properties of the buffer pad 341 allow it to deform when subjected to pressure, thereby absorbing the impact energy. The deformation of the buffer pad 341 not only absorbs energy, but also slows down the speed at which the collision plate 34 moves toward the collision beam 1, reducing the damage to the vehicle structure caused by the impact. At the same time, the buffer pad 341 has good recovery characteristics. After absorbing energy and deforming, the buffer pad 341 can return to its original shape. This recovery characteristic allows the buffer pad 341 to be reused, thereby improving the durability and economy of the system.

[0047] When the collision-resistant plate 34 is impacted, a part of the impact force of the collision will be transmitted to the collision beam 1, and the collision beam 1 will drive the sliding cylinder 32 to shrink into the support cylinder 31. At this time, the sliding cylinder 32 will compress and reduce the space of the buffer chamber 2 36, so that the hydraulic oil entering the buffer chamber 2 36 passes through a plurality of flow holes 321 opened at one end of the sliding cylinder 32 located in the support cylinder 31. The size and number of the flow holes 321 determine the resistance to the flow of the hydraulic oil. When the hydraulic oil flows, due to the limitation of the flow holes 321, a certain resistance will be generated. This resistance helps to absorb and disperse the impact energy.

[0048] It then enters the sliding cylinder 32 and pushes the sealing plug 322 slidably arranged therein to move, compressing the return spring 323 arranged between the sealing plug 322 and the collision beam 1. The movement of the sealing plug 322 is achieved through the flow and pressure change of the hydraulic oil, while the compression of the return spring 323 absorbs energy by storing elastic potential energy. The movement of the sealing plug 322 and the compression of the return spring 323 together absorb part of the impact energy. The processes of the movement of the sealing plug 322 and the compression of the return spring 323, as well as the resistance generated by the flow of the hydraulic oil, together provide a buffering effect for the vehicle, reducing the direct impact of the impact force on the vehicle structure and passengers.

[0049] After the impact, the compressed return spring 323 releases the stored energy, pushing the sealing plug 322 and the sliding cylinder 32 back to their initial positions, thus restoring the normal state of the system.

[0050] During the movement of the sliding rod 33, the sliding rod 33 drives the limit ring 37 arranged therein and located inside the sliding cylinder 32. The return spring 323 is located between the limit ring 37 and the sealing plug 322. The moving limit ring 37 compresses the return spring 323, and the return spring 323 provides a elastic force to the limit ring 37 to prevent the sliding rod 33 from moving excessively when subjected to an impact force, thereby avoiding damage or failure of the system components. At the same time, the compressed return spring 323 provides a greater elastic force to the sealing plug 322 to slow down the flow of the hydraulic oil into the sliding cylinder 32, further controlling the moving speed of the sliding rod 33, so as to more effectively absorb and disperse the impact energy.

[0051] Refer to Figure 4 and Figure 5 , wherein, a receiving hole 38 is formed at the bottom of the sliding rod 33, and the receiving hole 38 is also filled with hydraulic oil. The hydraulic oil provides a fluid medium in the receiving hole 38, which can absorb and disperse the impact energy. A support rod 39 is arranged at the bottom inside the support cylinder 31. During the movement of the sliding rod 33, the sliding disk 391 slidably arranged in the receiving hole 38 will move relatively in the receiving hole 38 through its connection with the support rod 39. At this time, the hydraulic oil in the receiving hole 38 will enter the first buffer cavity 35 through a plurality of through holes 392 formed on the sliding disk 391, filling the space originally occupied by the sliding disk 391. The combined action of the flow of the hydraulic oil and the filling of the first buffer cavity 35 absorbs and disperses the impact energy, further protecting the vehicle structure and passengers from the direct impact of the impact, and providing additional protection and buffering effect for the vehicle.

[0052] The collision beam 1 is provided with annular sliding holes 393 corresponding one-to-one with the sliding cylinders 32. During the movement of the sliding cylinders 32, the hydraulic oil in the second buffer chamber 36 will pass through the circulation holes 321 and enter the sliding cylinders 32. At this time, the sliding cylinders 32 are subjected to the resistance of the hydraulic oil, and the sliding cylinders 32 contract into the annular sliding holes 393 through the sliding connection with the annular sliding holes 393, thereby slowing down the movement of the hydraulic oil into the sliding cylinders 32. At the same time, it does not affect the movement of the sliding rod 33 and the collision beam 1, allowing the sliding rod 33 to move independently of the sliding cylinders 32, so as to gradually absorb the impact energy in segments, ensuring that energy is absorbed and dispersed at different stages, thereby improving the overall safety performance and impact resistance ability.

[0053] After the impact ends, the return spring 323 will push the sealing plug 322 to conduct the hydraulic oil in the sliding cylinder 32 back to the second buffer chamber 36 through the circulation holes 321. At the same time, the return spring 323 will push the limit ring 37 to move the sliding rod 33 and the sealing plug 322 in opposite directions. At the same time, the sliding rod 33 will drive the connecting ring 331 to move together. At this time, the hydraulic oil in the second buffer chamber 36 will pass through the connecting hole 332 and return to the first buffer chamber 35.

[0054] While the sliding rod 33 is moving, the sliding disk 391 moves relative to the sliding rod 33 in the receiving hole 38, so that the hydraulic oil in the first buffer chamber 35 enters the receiving hole 38 through the through-flow hole 392. Through the push of the return spring 323 and the flow of the hydraulic oil, the vehicle anti-collision beam can quickly recover after the impact ends, providing continuous protection for the vehicle, ensuring that energy can be effectively absorbed and dispersed in multiple impacts, and protecting the safety of the vehicle and passengers.

[0055] Embodiment 2:

[0056] Referring to Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 , on the basis of Embodiment 1, a frontal collision is the most common and usually the most dangerous type of traffic accident. In a frontal collision, the vehicle will receive a large impact force, which can quickly cause damage to the vehicle structure and cause serious injuries to passengers. To cope with this impact force, a flexible energy absorber 4 is provided on the collision beam 1. When a frontal collision of the vehicle occurs, the flexible energy absorber 4 can absorb the impact force and generate a corresponding reaction force according to the magnitude of the impact force. The reaction force generated by the flexible energy absorber 4 can partially or completely offset the original impact force, thereby reducing the energy transmitted to other parts of the vehicle. This offsetting effect helps to protect the structural integrity of the vehicle and reduce the risk of passenger injury.

[0057] Specifically, the flexible energy absorber 4 includes a buffer cylinder 41 penetrating through the collision beam 1, and a buffer rod 42 is slidably arranged in the buffer cylinder 41.

[0058] When a frontal collision of the vehicle occurs, the protection plate 421 arranged at one end of the buffer rod 42 will first bear the impact force of the collision, and then drive the buffer rod 42 to move into the buffer cylinder 41. As the buffer rod 42 moves, the air in the buffer cylinder 41 is compressed to form a resistance. At the same time, the buffer cylinder 41 moves into a sliding hole 422 opened on the collision beam 1 for the buffer cylinder 41 to slide along with the movement of the crash-resistant plate 34. It allows the buffer cylinder 41 to slide on the collision beam 1, thereby absorbing more energy.

[0059] Among them, a partition ring 43 is arranged in the buffer cylinder 41. The buffer rod 42 is located inside the partition ring 43. The buffer cylinder 41 is divided by the partition ring 43 from the inside out to form an inner cavity 431 and an outer cavity 432.

[0060] The buffer rod 42 will move into the partition ring 43, compressing the inner cavity 431 formed inside the partition ring 43. Compressing the air in the inner cavity 431 generates a resistance. The greater the impact force during the vehicle collision, the smaller the space of the inner cavity 431 is compressed, and the greater the resistance generated by the compressed air. On the contrary, the smaller the impact force during the vehicle collision, the larger the space of the inner cavity 431 is compressed, and the smaller the resistance generated by the compressed air.

[0061] The compressed air will pass through a plurality of ventilation holes 44 opened at the bottom of the buffer cylinder 41 by the partition ring 43. Through the connection with the outer cavity 432, the air enters the outer cavity 432 from the outer cavity 432, and then pushes the impact ring 45 slidably arranged in the outer cavity 432, causing the impact ring 45 to rush outwards and hit the protection plate 421 to form a reaction force to offset the original impact force, thereby reducing the energy transmitted to other parts of the vehicle.

[0062] The magnitude of the reaction force depends on the magnitude of the impact force during the vehicle collision. That is, the greater the impact force during the vehicle collision, the smaller the space of the inner cavity 431 is compressed, and at the same time, the faster the compression speed, the faster the gas enters the outer cavity 432 from the inner cavity 431, and the greater the force to push the impact ring 45 along, resulting in a greater reaction force. On the contrary, the smaller the impact force during the vehicle collision, the larger the space of the inner cavity 431 is compressed, and at the same time, the slower the compression speed, the slower the gas enters the outer cavity 432 from the inner cavity 431, and the smaller the force to push the impact ring 45 along, resulting in a smaller reaction force.

[0063] Wherein, a shut-off disk 46 is rotationally arranged at the bottom of the inner cavity 431 through a torsion spring (not shown in the figure). An arc-shaped groove 462 is formed in the shut-off disk 46, and a guiding inclined surface 463 is arranged at the bottom of the arc-shaped groove 462. A guiding hole 47 is formed at one end of the buffer rod 42 located inside the buffer cylinder 41.

[0064] During the movement of the buffer rod 42, the buffer rod 42 drives a contact rod 471 slidably arranged in the guiding hole 47 and corresponding to the guiding inclined surface 463. As the buffer rod 42 moves, the contact rod 471 abuts against the guiding inclined surface 463 arranged at the bottom of the arc-shaped groove 462. Since the elastic force of a contact spring 472 arranged between the contact rod 471 and the bottom of the guiding hole 47 is greater than the elastic force of the torsion spring, the shut-off disk 46 rotates and compresses the torsion spring. During this process, the shut-off disk 46 blocks the ventilation hole 44, so that the air in the inner cavity 431 is compressed and will not enter the outer cavity 432 to push the impact ring 45.

[0065] Until the shut-off disk 46 rotates, ventilation grooves 461 formed therein and corresponding to the ventilation holes 44 one by one will communicate with the ventilation holes 44. Then, the compressed air in the inner cavity 431 instantaneously enters the outer cavity 432 through the communicated ventilation grooves 461 and ventilation holes 44, thereby pushing the impact ring 45 to move outward and strike the protection plate 421, generating an instantaneous reaction force to offset the original impact force. At this time, the buffer rod 42 and the impact ring 45 can still move into the buffer cylinder 41, and the contact rod 471 will contract into the guiding hole 47 and compress the contact spring 472.

[0066] At this time, the inner cavity 431 communicates with the outer cavity 432. The buffer rod 42 and the impact ring 45 together compress the air in the buffer cylinder 41, and continue to form a buffer resistance, cooperating with the sliding cylinder 32 and the support cylinder 31 to absorb energy and buffer, further absorbing and dispersing the impact energy, providing a continuous buffer effect, and ensuring effective protection during collisions.

[0067] When the protection plate 421 drives the buffer rod 42 to contract into the buffer cylinder 41, a buffer spring 49 arranged between the impact ring 45 and the protection plate 421 will be compressed. The buffer spring 49 will provide an elastic force for the protection plate 421. When the impact ring 45 is pushed to move outward, the impact ring 45 will move in the opposite direction to the protection plate 421 and compress the buffer spring 49 together with the protection plate 421. The process of compressing the buffer spring 49 absorbs part of the impact energy, and the elastic force of the buffer spring 49 helps to reduce the direct impact of the impact force on the vehicle structure.

[0068] After the impact, since the vent groove 461 and the vent hole 44 are connected, the compressed air in the inner cavity 431 and the outer cavity 432 will push the impact ring 45 and the buffer rod 42 to move outward, and the buffer rod 42 will drive the resistance rod 471 to move together and break away from the contact with the guide slope 463. At this time, the compressed torsion spring will force the intercepting plate 46 to rotate, and the connecting vent groove 461 and the vent hole 44 are misaligned, and the connecting through hole 48 corresponding to the vent hole 44 on the intercepting plate 46 is connected to the vent hole 44.

[0069] Then the compressed buffer spring 49 will push the protective plate 421 to make the buffer rod 42 move opposite to the impact ring 45, and the impact ring 45 will push the air in the outer cavity 432, so that the air in the outer cavity 432 passes through the one-way valve 481 provided in the connecting through hole 48, and enters the inner cavity 431 through the connection between one end of the connecting through hole 48 and the inner cavity 431, thereby restoring the initial state.

[0070] The implementation principle of the present invention is:

[0071] (1): When a frontal collision of the vehicle occurs, the impact plate 34 provided at the end of the sliding rod 33 away from the base 2 will first bear the impact force, and the impact plate 34 will force the sliding rod 33 to shrink into the support tube 31, and continuously compress and reduce the space of the buffer cavity 1 35 formed between the connecting ring 331 in the support tube 31 and the bottom of the sliding tube 32. At the same time, the buffer cavity 2 36 formed between the connecting ring 331 in the support tube 31 and the bottom of the support tube 31 will increase as the buffer cavity 1 35 decreases.

[0072] (2): As the volume of buffer chamber 1 35 decreases, the hydraulic oil is compressed and the pressure increases. The hydraulic oil flows from buffer chamber 1 35 into buffer chamber 2 36 through a plurality of connecting holes 332 provided on the connecting ring 331. The flow of hydraulic oil between the two buffer chambers 1 35 and 36, as well as the change in volume of buffer chamber 1 35 and 36, work together to absorb and disperse the impact energy. This process of flow and volume change allows the energy to be gradually absorbed and dispersed, thereby reducing the impact on the vehicle structure and passengers.

[0073] (3): When the collision plate 34 is impacted, a part of the impact force of the collision will be transmitted to the collision beam 1, and the collision beam 1 will drive the sliding cylinder 32 to shrink into the support cylinder 31. At this time, the sliding cylinder 32 will compress and reduce the space of the buffer chamber 2 36, so that the hydraulic oil entering the buffer chamber 2 36 passes through a plurality of flow holes 321 opened at one end of the sliding cylinder 32 located in the support cylinder 31. The size and number of the flow holes 321 determine the resistance to the flow of the hydraulic oil. When the hydraulic oil flows, due to the limitation of the flow holes 321, a certain resistance will be generated. This resistance helps to absorb and disperse the impact energy.

[0074] (5): During the movement of the sliding rod 33, the sliding rod 33 will drive the limiting ring 37 provided thereon and located within the sliding cylinder 32. The return spring 323 is located between the limiting ring 37 and the sealing plug 322. The moving limiting ring 37 will compress the return spring 323, and the return spring 323 will provide an elastic force to the limiting ring 37 to prevent the sliding rod 33 from moving excessively when subjected to an impact force, thereby avoiding damage or failure of system components. At the same time, the compressed return spring 323 will provide a greater elastic force to the sealing plug 322 to slow down the flow of hydraulic oil into the sliding cylinder 32, further controlling the moving speed of the sliding rod 33, and thus more effectively absorbing and dispersing the impact energy.

[0075] (6): When a frontal collision of the vehicle occurs, the protective plate 421 provided at one end of the buffer rod 42 will first bear the impact force of the collision, and then drive the buffer rod 42 to move into the partition ring 43, compressing the inner cavity 431 formed within the partition ring 43 and generating resistance by compressing the air within the inner cavity 431.

[0076] (7): The compressed air will pass through the multiple ventilation holes 44 opened at the bottom of the buffer cylinder 41 by the partition ring 43. Through the connection with the outer cavity 432, the air enters the outer cavity 432 from the outer cavity 432, and then pushes the impact ring 45 slidably arranged within the outer cavity 432, causing the impact ring 45 to rush outwards and strike on the protective plate 421 to form a reaction force to counteract the original impact force, thereby reducing the energy transmitted to other parts of the vehicle.

[0077] (8): During the movement of the buffer rod 42, the ventilation groove 461 will be connected to the ventilation hole 44, and then the compressed air within the inner cavity 431 will instantaneously enter the outer cavity 432 through the connected ventilation groove 461 and ventilation hole 44, thereby pushing the impact ring 45 to move outwards and strike on the protective plate 421, generating an instantaneous reaction force to counteract the original impact force. At this time, the buffer rod 42 and the impact ring 45 can still move into the buffer cylinder 41, and the contact rod 471 will contract into the guiding hole 47 and compress the contact spring 472.

[0078] (9): After the impact ends, the return spring 323 will push the sealing plug 322 to drain the hydraulic oil within the sliding cylinder 32 back to the second buffer cavity 36 through the circulation hole 321. At the same time, the return spring 323 will push the limiting ring 37 to move the sliding rod 33 and the sealing plug 322 in opposite directions. At the same time, the sliding rod 33 will drive the connecting ring 331 to move together. At this time, the hydraulic oil within the second buffer cavity 36 will pass through the connecting hole 332 back to the first buffer cavity 35, enabling the vehicle anti-collision beam to quickly recover after the impact ends, providing continuous protection for the vehicle, ensuring effective absorption and dispersion of energy in multiple impacts, and protecting the safety of the vehicle and passengers.

[0079] (10): Meanwhile, the compressed buffer spring 49 will push the protective plate 421 to move the buffer rod 42 in the opposite direction of the impact ring 45. The impact ring 45 will push the air in the outer cavity 432, causing the air in the outer cavity 432 to pass through the one-way valve 481 provided in the connection through-hole 48 and enter the inner cavity 431 through the communication between one end of the connection through-hole 48 and the inner cavity 431, thereby restoring to the initial state.

[0080] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A flexible energy-absorbing and impact-resistant automobile bumper beam, comprising a collision beam (1) and bases (2) symmetrically installed on the automobile body, characterized in that: A buffer (3) is provided between the collision beam (1) and the two bases (2); The buffer (3) comprises a support tube (31) arranged on a base (2), a sliding tube (32) connected to a collision beam (1) being slidably arranged in the support tube (31), a plurality of flow holes (321) being provided at one end of the sliding tube (32) located in the support tube (31), a sealing plug (322) being slidably arranged in the sliding tube (32), and a return spring (323) being arranged between the sealing plug (322) and the collision beam (1).

2. The flexible energy-absorbing and impact-resistant automobile anti-collision beam according to claim 1, wherein: The buffer (3) further comprises a sliding rod (33), the sliding rod (33) being slidably and symmetrically penetrated on the collision beam (1), one end of the sliding rod (33) being slidably penetrated through the corresponding sealing plug (322) and the sliding cylinder (32) and then being provided with a connecting ring (331), the connecting ring (331) being provided with a plurality of connecting holes (332), and an anti-collision plate (34) being provided at one end of the sliding rod (33) away from the base (2); A buffer chamber 1 (35) is formed between the connecting ring (331) inside the support tube (31) and the bottom of the sliding tube (32), and a buffer chamber 2 (36) is formed between the connecting ring (331) inside the support tube (31) and the bottom of the support tube (31).

3. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 2, characterized in that: The sliding rod (33) is provided with a limiting ring (37) located inside the sliding cylinder (32), and the return spring (323) is located between the limiting ring (37) and the sealing plug (322).

4. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 3, characterized in that: The bottom of the sliding rod (33) is provided with a receiving hole (38), the bottom of the support tube (31) is provided with a supporting rod (39), a sliding plate (391) connected to the supporting rod (39) is slidably provided in the receiving hole (38), and a plurality of flow holes (392) are provided on the sliding plate (391).

5. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 1, characterized in that: The collision beam (1) is provided with an annular sliding hole (393) corresponding one to one with the sliding cylinder (32), and the sliding cylinder (32) is slidably connected to the annular sliding hole (393).

6. A flexible energy-absorbing and impact-resistant automotive bumper beam according to claim 2, characterized in that: The collision beam (1) is provided with a flexible energy absorber (4); The flexible energy absorber (4) comprises a buffer cylinder (41) passing through the collision beam (1), a buffer rod (42) being slidably arranged in the buffer cylinder (41), a protective plate (421) being arranged at one end of the buffer rod (42), and a sliding hole (422) for the buffer cylinder (41) to slide is provided on the collision beam (1).

7. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 6, characterized in that: A separation ring (43) is arranged in the buffer cylinder (41), the buffer rod (42) is located in the separation ring (43), the buffer cylinder (41) is separated from the inside to the outside by the separation ring (43) to form an inner cavity (431) and an outer cavity (432), the separation ring (43) is located at the bottom of the buffer cylinder (41) and is provided with a plurality of vent holes (44) connecting the inner cavity (431) and the outer cavity (432), and an impact ring (45) is slidably arranged in the outer cavity (432).

8. The flexible energy-absorbing and impact-resistant vehicle bumper beam according to claim 7, characterized in that: At the bottom of the inner cavity (431), a shut-off disk (46) is rotatably arranged through a torsion spring. Ventilation grooves (461) corresponding to the ventilation holes (44) one by one are formed in the shut-off disk (46). An arc-shaped groove (462) is formed in the shut-off disk (46), and a guiding inclined surface (463) is arranged at the bottom of the arc-shaped groove (462). At one end of the buffer rod (42) located inside the buffer cylinder (41), a guiding hole (47) is formed. A contact rod (471) corresponding to the guiding inclined surface (463) is slidably arranged in the guiding hole (47). A contact spring (472) is arranged between the contact rod (471) and the bottom of the guiding hole (47).

9. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 8, wherein: Connection through holes (48) corresponding to the ventilation holes (44) one by one are formed in the shut-off disk (46), and one end of each connection through hole (48) communicates with the inner cavity (431). A one-way valve (481) is arranged in each connection through hole (48).

10. A flexible energy-absorbing and impact-resistant automobile bumper beam according to claim 7, characterized in that: A buffer spring (49) is arranged between the impact ring (45) and the protection plate (421).

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