Multi-stage nested buffering piece structure for bumper

Abstract

The utility model provides a multi-stage nested type buffer piece structure for a bumper, which comprises the bumper, a front end cross beam and a multi-stage buffer mechanism, the multi-stage buffer mechanism is arranged on the rear end face of the bumper, and the front end cross beam is arranged on the rear end face of the multi-stage buffer mechanism. In order to solve the problems that in the prior art, when collision occurs, large energy cannot be absorbed, huge kinetic energy cannot be absorbed by means of a large number of springs, and all parts of a bumper need to be integrally replaced after collision occurs, the multi-stage buffering mechanism is designed, and energy generated by severe collision can be effectively absorbed by arranging multi-stage crumple boxes; and only the damaged crumple box is replaced according to different collision degrees, so that the safety of passengers and pedestrians is greatly improved during use, and meanwhile, the collision cost is reduced.

Description

Technical Field

[0001] This utility model relates to a multi-level nested buffer structure for bumpers, belonging to the field of automotive bumper technology. Background Technology

[0002] Customers are increasingly focused on vehicle safety, demanding higher and stricter standards. The front bumper, as a safety protection device, is a crucial component of modern automotive structures. The front bumper buffer and anti-collision beam play a vital role in protecting passengers and pedestrians. Most models use front bumper buffers made of EPP foam-molded monolithic strips. The anti-collision beam connects to low-speed energy-absorbing boxes with very low yield strength at both ends. These boxes effectively absorb collision energy during low-speed collisions, minimizing damage to the vehicle's longitudinal beams.

[0003] Publication number CN207773071U mentions a multi-stage buffer car bumper. By setting buffer blocks between the fixing device and the mounting holes, the bumper shell can undergo a certain lateral displacement when subjected to a non-complete frontal collision. This can form a lateral force component to dissipate part of the force generated by the collision, thereby increasing the amount of collision energy absorbed and buffered when passing through the secondary buffer components, reducing the direct impact of the impact on the vehicle body. However, in the event of a large impact, it cannot absorb a large amount of energy. Relying on a large number of springs cannot absorb the huge kinetic energy, and after a collision, all parts of the bumper need to be replaced. There is an urgent need for a multi-stage nested buffer structure for the bumper to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a multi-level nested buffer structure for bumpers to solve the problems mentioned in the background. This utility model designs a multi-level buffer mechanism that effectively absorbs the energy generated by severe collisions by setting up multiple levels of crumple boxes. Furthermore, it allows for the replacement of only damaged crumple boxes depending on the severity of the collision, greatly improving the safety of passengers and pedestrians during use while reducing the cost of collisions.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-level nested buffer structure for a bumper, comprising a bumper, a front crossbeam, and a multi-level buffer mechanism. The rear end face of the bumper is equipped with the multi-level buffer mechanism, and the rear end face of the multi-level buffer mechanism is equipped with the front crossbeam. The multi-level buffer mechanism includes a buffer block, a secondary collapse box, a support plate, a tertiary collapse box, hydraulic rods, buffer springs, a primary collapse box, and collapse guide grooves. Two secondary collapse boxes are installed on the front end face of the front crossbeam, and a primary collapse box is installed inside each secondary collapse box. The front end face of the secondary collapse box is equipped with the multi-level buffer mechanism. Two hydraulic rods are installed on the front end face of the front crossbeam, and a buffer spring is installed on the circumferential surface of each hydraulic rod. A buffer block is installed on the front end face of the support plate. Several collapse guide grooves are formed on the surfaces of both the primary and secondary collapse boxes.

[0006] Furthermore, the buffer block and the support plate are fixedly connected by buffer block fixing bolts. A connecting plate is installed on the side surface of the support plate. One end of the hydraulic rod is fixedly connected to the connecting plate, and the other end of the hydraulic rod is fixedly connected to the front crossbeam. One end of the buffer spring is fixedly connected to the connecting plate, and the other end of the buffer spring is fixedly connected to the front crossbeam.

[0007] Furthermore, the left and right ends of the support plate are respectively equipped with drop slots. The inner dimensions of the drop slots are the same as the upper surface dimensions of the secondary collapse box. The primary collapse box is fixedly connected to the support plate by top fixing bolts, and the secondary collapse box is fixedly connected to the front crossbeam by secondary fixing bolts.

[0008] Furthermore, the collapse guide grooves of the primary collapse box are all located inside the secondary collapse box, the primary collapse box penetrates the upper and lower surfaces of the secondary collapse box, and the tertiary collapse box is located between the two secondary collapse boxes.

[0009] Furthermore, the rear end face of the front crossbeam is provided with a bottom bolt groove, and the first-stage collapse box is fixedly connected to the front crossbeam by bottom fixing bolts, both of which are located inside the bottom bolt groove.

[0010] The beneficial effects of this utility model: This utility model provides a multi-level nested buffer structure for bumpers. Because it incorporates a buffer block, buffer block fixing bolts, a secondary crumple box, a secondary fixing bolt, a support plate, a drop groove, a connecting plate, a tertiary crumple box, a hydraulic rod, a buffer spring, a primary crumple box, a bottom fixing bolt, and a top fixing bolt, our design improvements and practical use have shown that this device has a reasonable structure and good practicality. The design of a multi-level buffer mechanism, through the setting of multiple crumple boxes, can effectively absorb the energy generated by severe collisions. Furthermore, depending on the degree of collision, only the damaged crumple box needs to be replaced, greatly improving the safety of passengers and pedestrians during use, while simultaneously reducing collision costs. Attached Figure Description

[0011] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0012] Figure 1 This is a three-dimensional structural diagram of a multi-level nested buffer structure for a bumper according to the present invention.

[0013] Figure 2 This is a three-dimensional schematic diagram of a multi-level buffer mechanism for a bumper with a multi-level nested buffer structure according to the present invention;

[0014] Figure 3 This is a rear view schematic diagram of the front crossbeam of a multi-level nested buffer structure for a bumper according to this utility model;

[0015] Figure 4 This is a cross-sectional schematic diagram of a two-stage crumple zone for a multi-level nested buffer structure used in a bumper according to this utility model.

[0016] Figure 5 This is a cross-sectional schematic diagram of a multi-level nested buffer block structure for a bumper according to the present invention;

[0017] In the diagram: 1-Bumper, 2-Front-end crossbeam, 21-Bottom bolt groove, 3-Multi-stage buffer mechanism, 31-Buffer block, 311-Buffer block fixing bolt, 32-Secondary collapse box, 321-Secondary fixing bolt, 33-Support plate, 331-Drop slot, 332-Connecting plate, 34-Third-stage collapse box, 35-Hydraulic rod, 36-Buffer spring, 37-First-stage collapse box, 371-Bottom fixing bolt, 372-Top fixing bolt, 38-Collapse guide groove. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-5 This utility model provides a technical solution: a multi-level nested buffer structure for a bumper, including a bumper 1, a front crossbeam 2, and a multi-level buffer mechanism 3. The rear end face of the bumper 1 is equipped with the multi-level buffer mechanism 3, and the rear end face of the multi-level buffer mechanism 3 is equipped with the front crossbeam 2. The multi-level buffer mechanism 3 includes a buffer block 31, a secondary collapse box 32, a support plate 33, a tertiary collapse box 34, a hydraulic rod 35, a buffer spring 36, a primary collapse box 37, and a collapse guide groove 38. The front end face of the front crossbeam 2 is equipped with two secondary collapse boxes 32, and each secondary collapse box 32 contains... The device is equipped with a primary crumple box 37 and a secondary crumple box 32. A multi-stage buffer mechanism 3 is installed on the front end face of the device. Two hydraulic rods 35 are installed on the front end face of the front crossbeam 2. A buffer spring 36 is installed on the circumferential surface of each hydraulic rod 35. A buffer block 31 is installed on the front end face of the support plate 33. Several crumple guide grooves 38 are opened on the surface of the primary crumple box 37 and the secondary crumple box 32. This design solves the problem that the original device cannot absorb a large amount of energy when a large impact occurs, that a large number of springs cannot absorb huge kinetic energy, and that all parts of the bumper need to be replaced after a collision.

[0020] As the first embodiment of this utility model: the buffer block 31 and the support plate 33 are fixedly connected by buffer block fixing bolts 311. A connecting plate 332 is installed on the side surface of the support plate 33. One end of the hydraulic rod 35 is fixedly connected to the connecting plate 332, and the other end of the hydraulic rod is fixedly connected to the front crossbeam 2. One end of the buffer spring 36 is fixedly connected to the connecting plate 332, and the other end of the buffer spring 36 is fixedly connected to the front crossbeam 2. The left and right ends of the support plate 33 are respectively equipped with drop slots 331. The inner dimensions of the drop slots 331 are the same as the upper surface dimensions of the secondary collapse box 32. The primary collapse box 37 is fixedly connected to the support plate 33 by top fixing bolts 372. The secondary collapse box 32 is fixedly connected to the front crossbeam 2. The crossbeam 2 is fixedly connected by secondary fixing bolts 321. The collapse guide grooves 38 of the primary collapse box 37 are all located inside the secondary collapse box 32. The primary collapse box 37 penetrates the upper and lower surfaces of the secondary collapse box 32. The tertiary collapse box 34 is located between the two secondary collapse boxes 32. By setting the collapse guide grooves 38 of the primary collapse box 37 inside the secondary collapse box 32, it can be ensured that the upper surface of the primary collapse box 37 always moves vertically into the interior of the secondary collapse box 32 when it collapses. The rear end face of the front crossbeam 2 is provided with a bottom bolt groove 21. The primary collapse box 37 and the front crossbeam 2 are fixedly connected by bottom fixing bolts 371. Both bottom fixing bolts 371 are located inside the bottom bolt groove 21.

[0021] As a second embodiment of this utility model: When the bumper 1 collides, the top buffer block 31 is impacted first. After the buffer block 31 is damaged by compression, the impact is immediately transmitted to the surface of the support plate 33. The support plate 33 is supported by two primary collapse boxes 37. When the impact is transmitted from the support plate 33 to the two primary collapse boxes 37, the primary collapse boxes 37 will collapse preferentially from the guide collapse groove. At this time, the hydraulic rod 35 and the buffer spring 36 will also resist the impact force simultaneously. When the primary collapse box 37 completely enters the secondary collapse box 32, the drop slot 331 will be stuck in the secondary collapse box 32. The upper surface of the first-stage collapse box 32 is then subjected to the impact force jointly by the second-stage collapse box 32 and the remaining first-stage collapse box 37. When the second-stage collapse box 32 and the first-stage collapse box 37 also collapse, the hydraulic rod 35 and the buffer spring 36 will also be damaged due to excessive compression. Finally, the third-stage collapse box 34 supports the support plate 33. The third-stage collapse box 34 will continue to collapse to buffer the remaining force. After an actual collision, each part can be replaced individually according to the different degrees of collision. If the third-stage collapse box 34 is also damaged, other parts will also be damaged, thus requiring overall replacement.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-level nested buffer structure for a bumper, comprising a bumper, a front crossbeam, and a multi-level buffer mechanism, characterized in that: The rear end face of the bumper is equipped with a multi-stage buffer mechanism, and the rear end face of the multi-stage buffer mechanism is equipped with a front crossbeam. The multi-stage buffer mechanism includes a buffer block, a secondary collapse box, a support plate, a tertiary collapse box, hydraulic rods, buffer springs, a primary collapse box, and collapse guide grooves. Two secondary collapse boxes are installed on the front end face of the front beam, and a primary collapse box is installed inside each secondary collapse box. The front end face of the secondary collapse box is equipped with a multi-stage buffer mechanism. Two hydraulic rods are installed on the front end face of the front beam, and a buffer spring is installed on the circumferential surface of each hydraulic rod. A buffer block is installed on the front end face of the support plate. Several collapse guide grooves are formed on the surfaces of the primary and secondary collapse boxes.

2. The multi-level nested buffer structure for a bumper according to claim 1, characterized in that: The buffer block and the support plate are fixedly connected by buffer block fixing bolts. A connecting plate is installed on the side surface of the support plate. One end of the hydraulic rod is fixedly connected to the connecting plate, and the other end of the hydraulic rod is fixedly connected to the front crossbeam. One end of the buffer spring is fixedly connected to the connecting plate, and the other end of the buffer spring is fixedly connected to the front crossbeam.

3. The multi-level nested buffer structure for a bumper according to claim 1, characterized in that: The left and right ends of the support plate are respectively equipped with drop slots. The inner dimensions of the drop slots are the same as the upper surface dimensions of the secondary collapse box. The primary collapse box is fixedly connected to the support plate by top fixing bolts, and the secondary collapse box is fixedly connected to the front crossbeam by secondary fixing bolts.

4. The multi-level nested buffer structure for a bumper according to claim 1, characterized in that: The collapse guide grooves of the primary collapse box are all located inside the secondary collapse box. The primary collapse box penetrates the upper and lower surfaces of the secondary collapse box. The tertiary collapse box is located between the two secondary collapse boxes.

5. A multi-level nested buffer structure for a bumper according to claim 1, characterized in that: The rear end face of the front crossbeam is provided with a bottom bolt groove, and the first-stage collapse box is fixedly connected to the front crossbeam by bottom fixing bolts. Both bottom fixing bolts are located inside the bottom bolt groove.

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