Automobile and sandwich energy absorption box thereof

Abstract

The present invention discloses an automobile and a sandwich energy absorbing box thereof, the sandwich energy absorbing box comprising: a first tube, a plurality of first convex rings extending along the circumferential direction are arranged on the outer wall of the first tube, a collapse groove is formed between two adjacent first convex rings, and both ends of the first tube are provided with connecting pieces; a second tube sleeved in the first tube, the outer wall of the second tube and the inner wall of the first tube are fixedly connected by a connecting beam; a filler is filled between the first tube and the second tube. The structural design of the sandwich energy absorbing box can effectively improve the energy absorbing capacity of the energy absorbing box.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and more specifically to an automobile and a sandwich-type energy absorption box thereof. Background Art

[0002] When a car encounters a mild frontal collision, an energy absorption box is usually installed between the front bumper beam and the front longitudinal beam to prevent excessive deformation of the front bumper beam. When the impact energy of the collision exceeds the energy absorption capacity of the front bumper, the energy absorption box begins to crush and deform to absorb part of the impact energy, thereby preventing the impact energy from directly acting on the front longitudinal beam and causing its deformation.

[0003] The energy absorption boxes of metal sheet metal supports commonly used at present are heavy and have poor energy absorption stability; the energy absorption boxes with foam filled completely and evenly inside have a small initial load on the structural section, low energy utilization rate of the energy absorption box, and poor energy absorption capacity of the vehicle for offset collisions.

[0004] In summary, how to effectively improve the energy absorption capacity of the energy absorption box is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, a first object of the present invention is to provide a sandwich energy absorbing box, the structural design of which can effectively improve the energy absorbing capacity of the energy absorbing box. A second object of the present invention is to provide a car including the above-mentioned sandwich energy absorbing box.

[0006] In order to achieve the above first object, the present invention provides the following technical solutions:

[0007] A sandwich energy absorbing box, comprising:

[0008] A first tube, wherein a plurality of first convex rings extending in a circumferential direction are arranged on an outer wall of the first tube, a collapse groove is formed between two adjacent first convex rings, and connecting pieces are arranged at both ends of the first tube;

[0009] A second tube sleeved in the first tube, wherein the outer wall of the second tube is fixedly connected to the inner wall of the first tube via a connecting beam;

[0010] A filler is filled between the first tube and the second tube.

[0011] Preferably, in the above sandwich energy absorbing box, the first tube is a metal round tube, and the second tube is a metal square tube.

[0012] Preferably, in the above sandwich energy absorbing box, the position where the connecting beam is connected to the first tube is opposite to the first convex ring.

[0013] Preferably, in the sandwich energy absorbing box, the inner wall of the first tube is provided with a second convex ring extending along the circumferential direction, and one end of the connecting beam is fixedly connected to the second convex ring;

[0014] The second convex ring of the first tube is arranged opposite to the collapse groove.

[0015] Preferably, in the above sandwich energy absorbing box, a third convex ring extending along the circumferential direction is provided on the outer wall of the second tube, and the other end of the connecting beam is fixedly connected to the third convex ring.

[0016] Preferably, in the above sandwich energy absorbing box, a thermoplastic resin layer is further provided on the inner wall of the first tube, and the filler is located between the thermoplastic resin layer and the outer wall of the second tube.

[0017] Preferably, in the above sandwich energy absorbing box, the first tube, the connecting beam and the second tube are formed by integral casting.

[0018] Preferably, in the above sandwich energy absorbing box, the filler is foamed aluminum.

[0019] Preferably, in the above sandwich energy absorbing box, the outer diameter of the first tube is 8-15 cm, the width of the first convex ring is 0.3-0.8 cm, and the width of the collapse groove is 0.5-1.2 cm.

[0020] An automobile comprises a sandwich energy absorbing box as described in any one of the above.

[0021] When the sandwich energy absorption box provided by the above embodiment is used, the connecting pieces at both ends of the first tube are fixedly connected to the front bumper beam and the front longitudinal beam of the automobile respectively. The sandwich energy absorption box adopts the form of a first tube and a second tube being nested, and the first tube and the second tube are fixedly connected by a connecting beam, and a filler is filled between the first tube and the second tube, and a collapse groove is arranged outside the first tube, which greatly improves its energy absorption capacity, has high strength, and good stability.

[0022] In order to achieve the second objective, the present invention further provides a car, which includes any one of the above sandwich energy absorbing boxes. Since the above sandwich energy absorbing box has the above technical effects, the car having the sandwich energy absorbing box should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of the sandwich energy absorbing box provided by the present invention;

[0025] Figure 2 for Figure 1 Cross-sectional view at position A in the middle;

[0026] Figure 3 This is a front view of the sandwich energy absorbing box provided by the present invention.

[0027] exist Figure 1-3 middle:

[0028] 1-first tube, 101-first convex ring, 102-collapse groove, 103-thermoplastic resin layer, 2-second tube, 201-connecting beam, 3-first connecting flange, 301-first bolt connection hole, 4-filler, 5-second connecting flange, 501-second bolt connection hole. DETAILED DESCRIPTION

[0029] The first object of the present invention is to provide a sandwich energy absorbing box, the structural design of which can effectively improve the energy absorbing capacity of the energy absorbing box. The second object of the present invention is to provide a car including the above-mentioned sandwich energy absorbing box.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left" and "right" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] See also Figure 1-Figure 3 The sandwich energy absorbing box provided by the present invention includes a first tube 1, a second tube 2 and a filler 4.

[0033] The outer wall of the first tube 1 is provided with a plurality of first convex rings 101 extending in the circumferential direction, that is, the first convex rings 101 extend in the circumferential direction of the first tube 1, each first convex ring 101 surrounds the outer wall of the first tube 1, and the plurality of first convex rings 101 are arranged in sequence along the axial direction of the first tube 1. Specifically, the plurality of first convex rings 101 can be evenly distributed along the axial direction of the first tube 1. A collapse groove 102 is formed between two adjacent first convex rings 101, that is, a collapse groove 102 is formed in the gap between two adjacent first convex rings 101. Connectors are provided at both ends of the first tube 1 to facilitate connecting the sandwich energy absorption box between the front bumper beam and the front longitudinal beam of the automobile.

[0034] The second tube 2 is sleeved inside the first tube 1, and the second tube 2 and the first tube 1 can be coaxially arranged or relatively eccentrically arranged. The outer wall of the second tube 2 is fixedly connected to the inner wall of the first tube 1 through the connecting beam 201, that is, one end of the connecting beam 201 is fixedly connected to the first tube 1 and the other end is fixedly connected to the second tube 2. The filler 4 is filled between the first tube 1 and the second tube 2. The filler 4 is in contact with the connecting beam 201, and the filler 4 can wrap the entirety or part of the connecting beam 201. The filler 4 is in close contact or extrusion fit with the first tube 1 and the second tube 2.

[0035] When the sandwich energy absorption box provided by the above embodiment is used, the connectors at both ends of the first tube 1 are fixedly connected to the front bumper beam and the front longitudinal beam of the automobile respectively. The sandwich energy absorption box adopts the form of the first tube 1 and the second tube 2 being nested, and the first tube 1 and the second tube 2 are fixedly connected by the connecting beam 201, and a filler 4 is filled between the first tube 1 and the second tube 2, and a collapse groove 102 is arranged outside the first tube 1, which greatly improves its energy absorption capacity, has high strength and good stability.

[0036] The first tube 1 is a metal round tube, and the second tube 2 is a metal square tube. Alternatively, the first tube 1 is a metal square tube, and the second tube 2 is a metal round tube, which is not limited here.

[0037] In a specific embodiment, the position where the connecting beam 201 is connected to the first tube 1 is opposite to the first convex ring 101, that is, the connecting beam 201 is opposite to the first convex ring 101, which further ensures the strength of the sandwich energy absorption box. Of course, the position where the connecting beam 201 is connected to the first tube 1 and the first convex ring 101 can also be staggered, which is not limited here.

[0038] In another embodiment, a second convex ring extending in the circumferential direction is further provided on the inner wall of the first tube 1, the second convex ring extending in the circumferential direction of the first tube 1, each second convex ring surrounds the inner wall of the first tube 1, and a plurality of second convex rings are sequentially arranged along the axial direction of the first tube 1. One end of the connecting beam 201 can be directly fixedly connected to the second convex ring, or one end of the connecting beam 201 can also be fixedly connected to the groove between the two second convex rings, which is not limited here.

[0039] Furthermore, the second convex ring of the first tube 1 is arranged opposite to the collapse groove 102, so that the stress of the first tube 1 can be balanced and the internal stress effect can be reduced.

[0040] In addition, a third convex ring extending in the circumferential direction is provided on the outer wall of the second tube 2, the third convex ring extends in the circumferential direction of the second tube 2, each third convex ring surrounds the outer wall of the second tube 2, and a plurality of third convex rings are sequentially arranged along the axial direction of the second tube 2. The other end of the connecting beam 201 can be directly fixedly connected to the third convex ring, or the other end of the connecting beam 201 can also be fixedly connected to the groove between the two third convex rings, which is not limited here.

[0041] Preferably, a thermoplastic resin layer 103 is also laid on the inner wall of the first tube 1, and the filler 4 is located between the thermoplastic resin layer 103 and the outer wall of the second tube 2. Such an arrangement increases the buffering performance of the sandwich energy absorption box and further improves the energy absorption capacity.

[0042] In order to facilitate processing and manufacturing, the first tube 1, the connecting beam 201 and the second tube 2 can be formed by integral casting. The first tube 1, the connecting beam 201 and the second tube 2 are all made of aluminum, and the first tube 1, the connecting beam 201 and the second tube 2 can be integrally formed by pouring molten aluminum from a mold. Of course, the first tube 1, the connecting beam 201 and the second tube 2 can also be processed separately and then welded together, which is not limited here.

[0043] In this embodiment, the filler 4 can be made of foamed aluminum, which has the advantages of low density, high impact absorption, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, high forming precision, etc. Of course, the filler 4 can also be made of other materials, such as rubber, plastic foam, etc., which are not limited here.

[0044] The outer surface of the filler 4 is pressed together with the second tube 2 and the first tube 1 .

[0045] Optionally, the filler 4 can be bonded to the second tube 2 and the first tube 1 by glue. Alternatively, the filler 4, the second tube 2 and the first tube 1 can be foamed at one time, so that the filler 4, the second tube 2 and the first tube 1 are connected together by injection molding.

[0046] Preferably, the outer circumference of the first tube 1 may be 8-15 cm, the length of the first tube 1 may be 15-30 cm, and the wall thickness of the first tube 1 may be 0.3-0.8 cm. Specifically, the outer circumference of the first tube 1 is 10 cm, the length of the first tube 1 is 30 cm, and the wall thickness of the first tube 1 is 0.5 cm.

[0047] The width of the first convex ring 101 can be 0.3-0.8 cm, and the width of the collapse groove 102 can be 0.5-1.2 cm. Specifically, the width of the first convex ring 101 is 0.5 cm, and the width of the collapse groove 102 is 0.5 cm. The widths of the first convex ring 101 and the collapse groove 102 here both refer to the extension distances thereof along the axial direction of the metal tube 1.

[0048] The connecting pieces at both ends of the first pipe 1 can be a first connecting flange and a second connecting flange respectively. The first connecting flange 3 is provided with a first bolt connecting hole 302. The second connecting flange 5 is provided with a second bolt connecting hole 501.

[0049] Based on the sandwich energy absorbing box provided in the above embodiments, the present invention further provides a car, which includes any one of the sandwich energy absorbing boxes in the above embodiments. Since the car adopts the sandwich energy absorbing box in the above embodiments, please refer to the above embodiments for the beneficial effects of the car.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sandwich energy absorption box, characterized in that: include: A first tube (1), wherein a plurality of first convex rings (101) extending in a circumferential direction are arranged on an outer wall of the first tube (1), a collapse groove (102) is formed between two adjacent first convex rings (101), and connecting pieces are arranged at both ends of the first tube (1); a second tube (2) sleeved inside the first tube (1), the outer wall of the second tube (2) being fixedly connected to the inner wall of the first tube (1) via a connecting beam (201); A filler (4) filled between the first tube (1) and the second tube (2); the filler (4) wraps the entirety of the connecting beam (201); The position where the connecting beam (201) is connected to the first tube (1) is staggered with the first convex ring (101); The inner wall of the first tube (1) is provided with a second convex ring extending along the circumferential direction, each second convex ring surrounds the inner wall of the first tube (1), and a plurality of second convex rings are arranged in sequence along the axial direction of the first tube (1); one end of the connecting beam (201) is fixedly connected to the second convex ring; The second convex ring of the first tube (1) is arranged opposite to the collapse groove (102); A third convex ring extending in the circumferential direction is provided on the outer wall of the second tube (2), each of the third convex rings surrounds the outer wall of the second tube (2), and a plurality of the third convex rings are arranged in sequence along the axial direction of the second tube (2); the other end of the connecting beam (201) is fixedly connected to the third convex ring; The outer surface of the filler (4) is pressed together with the second tube (2) and the first tube (1); The first tube (1) is a metal round tube, and the second tube (2) is a metal square tube; A thermoplastic resin layer (103) is also provided on the inner wall of the first tube (1), and the filler (4) is located between the thermoplastic resin layer (103) and the outer wall of the second tube (2).

2. The sandwich energy absorption box according to claim 1, characterized in that: The first tube (1), the connecting beam (201) and the second tube (2) are formed by integral casting.

3. The sandwich energy absorption box according to claim 1, characterized in that: The filler (4) is foamed aluminum.

4. The sandwich energy absorption box according to claim 1, characterized in that: The outer circumference of the first tube (1) is 8-15 cm, the width of the first convex ring (101) is 0.3-0.8 cm, and the width of the collapse groove (102) is 0.5-1.2 cm.

5. A car, characterized in that: It comprises a sandwich energy absorbing box as claimed in any one of claims 1 to 4.

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