Rear anti-collision beam and vehicle

Abstract

The utility model discloses a rear anti-collision beam and a vehicle, and the rear anti-collision beam comprises two first anti-collision beams, a second anti-collision beam, a third anti-collision beam and a fourth anti-collision beam, the second anti-collision beam is clamped between the two first anti-collision beams, the porosity of the first anti-collision beams is different from that of the second anti-collision beam, second clamping parts are arranged at the two ends of the second anti-collision beam, and when the first anti-collision beams and the second anti-collision beam are clamped and matched through the first clamping parts and the second clamping parts, the porosity of the first anti-collision beams is different from that of the second anti-collision beams. The first clamping part and the second clamping part are matched in a bonding mode, and the first clamping part and the second clamping part are further fixed through a fastener. When the first anti-collision beam and the second anti-collision beam are clamped and matched through the first clamping part and the second clamping part, the first clamping part and the second clamping part are bonded and matched, and the first clamping part and the second clamping part are fixed through the fastener, so that reliable connection of the first anti-collision beam and the second anti-collision beam is guaranteed, and the anti-collision effect is improved. The abnormal sound problem of the contact surface is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of rear anti-collision beams, in particular to a rear anti-collision beam and a vehicle. Background Art

[0002] The rear cross beam of a car, also known as the rear anti-collision beam, is fixedly installed at the rear of the frame to play a role in buffering and absorbing energy, thereby reducing the collision force, thereby protecting the safety of the driver and passengers, and providing certain protection for the rear panel of the vehicle.

[0003] In the related technologies, with the development of the automobile industry, people are gradually optimizing the appearance, performance and overall lightweight of vehicles. At present, some automobile anti-collision beams on the market are made of fiberglass materials. This type of anti-collision beam is lighter than steel anti-collision beams and can reduce the overall weight of the vehicle, but its toughness and strength are unsatisfactory.

[0004] In order to reduce the weight of the vehicle body, some vehicles do not install anti-collision steel beams, or only install buffer foam to replace the anti-collision beam. Although the weight of the vehicle body can be reduced, the price and fuel consumption are reduced, but the safety factor of the vehicle is also reduced. Alternatively, foamed aluminum is used to replace the anti-collision beam, but the application of foamed aluminum is not flexible enough, usually a single casting wire cutting application, which cannot give full play to the lightweight advantages of foamed aluminum. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a rear anti-collision beam, wherein the first anti-collision beam and the second anti-collision beam are engaged with each other through a first clamping part and a second clamping part, the first clamping part and the second clamping part are also bonded together, and the first clamping part and the second clamping part are also fixed by a fastener.

[0006] The utility model further provides a vehicle.

[0007] According to the first aspect of the utility model, the rear anti-collision beam comprises: two first anti-collision beams, each of which is provided with a first clamping portion; a second anti-collision beam, wherein the second anti-collision beam is clamped between the two first anti-collision beams and the porosity of the first anti-collision beam and the second anti-collision beam are different, and second clamping portions are provided at both ends of the second anti-collision beam, and the first anti-collision beam and the second anti-collision beam are clamped and matched by the first clamping portion and the second clamping portion, and the first clamping portion and the second clamping portion are also bonded and matched, and the first clamping portion and the second clamping portion are also fixed by fasteners.

[0008] According to the rear anti-collision beam of the embodiment of the utility model, the first anti-collision beam and the second anti-collision beam are clamped together by the first clamping part and the second clamping part, the first clamping part and the second clamping part are bonded together, and the first clamping part and the second clamping part are fixed by fasteners, thereby ensuring the reliable connection between the first anti-collision beam and the second anti-collision beam while avoiding the problem of abnormal noise on the contact surface.

[0009] According to some embodiments of the utility model, the rear anti-collision beam also includes: a bushing, the bushing includes: a main body and an end portion, the main body and the end portion are connected to each other, the main body passes through the second clamping portion, and the end portion is clamped between the fastener and the second clamping portion.

[0010] According to some embodiments of the present invention, the wall thickness of the main body is t, and t satisfies the relationship: 2mm≤t≤5mm; and the diameter of the end portion is d1, the outer diameter of the main body is d2, the porosity of the second anti-collision beam is α, and the relationship between d1, d2 and α satisfies: d1≥(d2+8mm) / (1-α).

[0011] According to some embodiments of the present invention, the first clamping portion is at least one protrusion, and the second clamping portion is at least one groove, and at least one of the protrusions and at least one of the grooves are plugged into and matched with each other.

[0012] According to some embodiments of the present utility model, the thickness of the first anti-collision beam and the second anti-collision beam is h1, the thickness of the protrusion and the groove is h2, and h1 and h2 satisfy the relationship: 40mm≤h1-h2≤80mm, 30mm≤h2≤50mm.

[0013] According to some embodiments of the present invention, the length of the protrusion and the width of the groove are h3, and h3 satisfies the relationship: 30mm≤h3≤50mm.

[0014] The vehicle according to the second embodiment of the utility model comprises: a vehicle body structure and the rear anti-collision beam, wherein the rear anti-collision beam is fixed on the vehicle body structure.

[0015] According to some embodiments of the present utility model, the vehicle body structure includes: a rear panel and two rear floor longitudinal beams, the rear panel is arranged between the two rear floor longitudinal beams, and the two ends of the rear anti-collision beam are respectively fixedly connected to the two rear floor longitudinal beams.

[0016] According to some embodiments of the utility model, a support boss is provided on the side of the second anti-collision beam facing the vehicle body structure, and the vehicle body structure also includes: a rear floor reinforcement, which is arranged below the rear panel, and the support boss and the rear floor reinforcement are arranged relative to each other.

[0017] According to some embodiments of the present utility model, the gap between the supporting boss and the rear floor reinforcement is h4, and h4 satisfies the relationship: 10mm≤h4≤20mm.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of one angle of cooperation between the rear anti-collision beam and the rear floor longitudinal beam according to an embodiment of the utility model;

[0021] Figure 2 is a structural schematic diagram of another angle of cooperation between the rear anti-collision beam and the rear floor longitudinal beam according to an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of one angle of a rear anti-collision beam according to an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of one angle of the rear anti-collision beam according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100. Rear anti-collision beam;

[0026] 10. A first anti-collision beam; 11. A first clamping portion;

[0027] 20. Second anti-collision beam; 21. Second clamping portion; 22. Support boss;

[0028] 30. Bushing; 31. End;

[0029] 200.Rear floor longitudinal beam. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0031] Reference below Figure 1-Figure 4 A rear impact beam 100 according to an embodiment of the present invention is described, and the present invention also provides a vehicle.

[0032] Reference Figure 3 and Figure 4As shown, the rear anti-collision beam 100 of the embodiment of the utility model includes: two first anti-collision beams 10 and a second anti-collision beam 20 , and the second anti-collision beam 20 is sandwiched between the two first anti-collision beams 10 .

[0033] Among them, the first anti-collision beam 10 is directly fixedly connected to the vehicle body structure, and in the event of a collision, the first anti-collision beam 10 will first collapse and absorb energy. If the collision energy is large, the second anti-collision beam 20 will collide with the vehicle body structure and collapse and absorb energy, thereby effectively absorbing the energy generated by the collision.

[0034] Furthermore, the porosity of the first anti-collision beam 10 and the second anti-collision beam 20 are different. Since the first anti-collision beam 10 will collapse and absorb energy first during a collision, and the second anti-collision beam 20 will collapse and absorb energy later than the first anti-collision beam 10, the porosity of the first anti-collision beam 10 is less than the porosity of the second anti-collision beam 20. That is, the first anti-collision beam 10 is a hard zone structure, which can be collapsed in coordination with the vehicle body structure during a rear collision, and the second anti-collision beam 20 is a soft zone structure, which can protect the internal structure of the rear bumper in daily extremely low-speed collisions. If the internal structure of the rear bumper invades the second anti-collision beam 20, it will not be damaged, so that the interior of the rear bumper can continue to be used, and at the same time, the second anti-collision beam 20 will not be damaged and can continue to be used.

[0035] Specifically, the porosity of the first impact beam 10 is 40%, and the porosity of the second impact beam 20 is 60%.

[0036] Among them, the first anti-collision beam 10 and the second anti-collision beam 20 are both foamed aluminum. The interior of the foamed aluminum is a porous material formed by many bubble layers, which is lighter and more effective in absorbing energy than the original metal material. Among them, foamed aluminum is lighter than the original metal material. For example, the density of foamed aluminum is 0.1-0.4 times that of metal aluminum. In addition, foamed aluminum has high specific stiffness, and its bending specific stiffness is 1.5 times that of steel. In addition, foamed aluminum has high damping and shock absorption performance and impact energy absorption rate. For example, the damping performance of foamed aluminum is 5-10 times that of metal aluminum. Foamed aluminum with a porosity of 84% can absorb more than 2.5MJ / m3 of energy when 50% deformation occurs.

[0037] In addition, the first anti-collision beam 10 is provided with a first clamping portion 11, and the second clamping portions 21 are provided at both ends of the second anti-collision beam 20, and the first clamping portion 11 and the second clamping portion 21 are clamped together. In other words, the first clamping portion 11 on the first anti-collision beam 10 and the second clamping portion 21 on the second anti-collision beam 20 are clamped together, that is, the first anti-collision beam 10 and the second anti-collision beam 20 are pre-positioned by clamping, thereby facilitating the connection of the first anti-collision beam 10 and the second anti-collision beam 20.

[0038] In addition, the first clamping portion 11 and the second clamping portion 21 are bonded together. That is, applying glue on the overlapped surface of the first clamping portion 11 and the second clamping portion 21 can not only achieve the bonding of the first anti-collision beam 10 and the second anti-collision beam 20, but also avoid abnormal noise on the contact surface of the first anti-collision beam 10 and the second anti-collision beam 20. Furthermore, if the connection strength needs to be improved, structural glue can be applied to strengthen the overlapped surface.

[0039] In addition, the rear anti-collision beam 100 further includes a fastener, which fixes the first clamping portion 11 and the second clamping portion 21. In other words, the first clamping portion 11 and the second clamping portion 21 are also fixedly connected by the fastener, that is, the fastener can reduce abnormal noise on the contact surface of the first anti-collision beam 10 and the second anti-collision beam 20 while fixing the first clamping portion 11 and the second clamping portion 21.

[0040] Therefore, the first anti-collision beam 10 and the second anti-collision beam 20 are clamped and matched through the first clamping part 11 and the second clamping part 21, and the first clamping part 11 and the second clamping part 21 are also bonded and matched, and the first clamping part 11 and the second clamping part 21 are also fixed by fasteners.

[0041] In addition, if Figure 1-Figure 3 As shown, the rear anti-collision beam 100 further includes: a bushing 30, which includes: a main body and an end 31, the main body and the end 31 are connected to each other, the main body passes through the second clamping portion 21, and the end 31 is clamped between the fastener and the second clamping portion 21. By providing the bushing 30 on the rear anti-collision beam 100, it is possible to prevent the fastener from damaging the rear anti-collision beam 100 during the tightening process. In addition, the bushing 30 is connected to the second clamping portion 21 by using a pressure riveting form.

[0042] The bushing 30 is composed of a main body and an end portion 31 . The main body extends into the second clamping portion 21 , and the end portion 31 is clamped between the fastener and the second clamping portion 21 , that is, the fastener will not damage the structure of the second clamping portion 21 .

[0043] The wall thickness of the main body is t, and t satisfies the relationship: 2mm≤t≤5mm. That is, the wall thickness t of the main body is between 2mm and 5mm. The wall thickness of the main body within this range will not affect the connection strength between the first anti-collision beam 10 and the second anti-collision beam 20 due to being too thick, and will not cause the fastener to pierce the main body due to being too thin.

[0044] Furthermore, the diameter of the end portion 31 is d1, the outer diameter of the main body is d2, the porosity of the second anti-collision beam 20 is α, and the relationship between d1, d2 and α is: d1≥(d2+8mm) / (1-α). In this way, the diameter of the end portion 31 is related to the outer diameter of the main body and the porosity of the second anti-collision beam 20. By reasonably setting the diameter of the end portion 31, the fastener will not damage the rear anti-collision beam 100 during the tightening process.

[0045] The first clamping portion 11 may be at least one protrusion, and the second clamping portion 21 may be at least one groove, and the at least one protrusion and the at least one groove are plugged and matched with each other. In other words, the first anti-collision beam 10 and the second anti-collision beam 20 are connected to each other by the clamping between the at least one protrusion and the at least one groove.

[0046] Of course, the first clamping portion 11 can be two protrusions, and the second clamping portion 21 can be two grooves, the two protrusions correspond to the two grooves one by one, and are mutually clamped and matched. Through the mutual clamping and matching between the two bosses and the two grooves, the connection stability between the first anti-collision beam 10 and the second anti-collision beam 20 can be improved.

[0047] In addition, if Figure 4 As shown, the thickness of the first anti-collision beam 10 and the second anti-collision beam 20 is h1, the thickness of the protrusion and the groove is h2, and h1 and h2 satisfy the relationship: 40mm≤h1-h2≤80mm, 30mm≤h2≤50mm. In other words, the thickness of the protrusion is set between 30mm-50mm, and the size of the second anti-collision beam 20 after removing the groove is set between 40mm-80mm, so that the first clamping portion 11 and the second clamping portion 21 can be prevented from failing during a collision.

[0048] Among them, Figure 3 As shown, the length of the protrusion and the width of the groove are h3, and h3 satisfies the relationship: 30mm≤h3≤50mm. In this way, the length of the boss and the width of the groove are set between 30mm-50mm, which can avoid the failure of the first clamping part 11 and the second clamping part 21 during the collision. Among them, when the width of the protrusion is longer than 50mm, the connection strength between the protrusion and the groove is low, and the protrusion will break when a collision occurs. And, when the width of the protrusion is shorter than 30mm, the contact area between the first clamping part 11 and the second clamping part 21 is small, which will cause the connection strength between the first clamping part 11 and the second clamping part 21 to be poor.

[0049] The vehicle of the second embodiment of the utility model comprises: a vehicle body structure and a rear anti-collision beam 100, wherein the rear anti-collision beam 100 is fixed on the vehicle body structure.

[0050] As Figure 1 and Figure 2As shown, the vehicle body structure includes: a rear panel and two rear floor longitudinal beams 200, the rear panel is arranged between the two rear floor longitudinal beams 200, and the two ends of the rear anti-collision beam 100 are respectively fixedly connected to the two rear floor longitudinal beams 200. In other words, the first anti-collision beam 10 is fixedly connected to the rear floor longitudinal beam 200, and since the first anti-collision beam 10 is a hard zone structure, the first anti-collision beam 10 and the rear floor longitudinal beam 200 can be collapsed in coordination during a rear collision.

[0051] As Figure 2 As shown, a support boss 22 is provided on the side of the second anti-collision beam 20 facing the vehicle body structure, and the vehicle body structure further includes: a rear floor reinforcement, which is provided below the rear panel, and the support boss 22 and the rear floor reinforcement are arranged opposite to each other. In this way, the support boss 22 is provided on the second anti-collision beam 20, and the support boss 22 and the rear floor reinforcement are arranged opposite to each other, so that when the second anti-collision beam 20 collapses to absorb energy, the support boss 22 can contact the rear floor reinforcement, so that a force transmission channel is formed between the support boss 22 and the rear floor reinforcement, thereby improving the collision energy absorption performance of the vehicle body structure and the rear anti-collision beam 100.

[0052] The gap between the support boss 22 and the rear floor reinforcement is h4, and h4 satisfies the relationship: 10mm≤h4≤20mm. In other words, a gap is set between the support boss 22 and the rear floor reinforcement. By setting the gap, when a collision occurs, the first anti-collision beam 10 in the hard zone collapses first to absorb energy. After the structure of the first anti-collision beam 10 collapses, the support boss 22 will contact the rear floor reinforcement to achieve collapse and energy absorption.

[0053] In this way, when the rear of the vehicle collides, the rear of the vehicle will have three stages during the low-speed collision process. In stage one, the connection between the first anti-collision beam 10 and the rear floor longitudinal beam 200 first collapses and absorbs energy; in stage two, when the first anti-collision beam 10 continues to collapse and absorb energy, the support boss 22 contacts the rear floor reinforcement, and the force transmission channel between the support boss 22 and the rear floor reinforcement is closed, and the support boss 22 begins to collapse and absorb energy; in stage three, when the rear anti-collision beam 100 contacts the rear floor longitudinal beam 200, the rear panel and the rear floor reinforcement at the same time, the rear anti-collision beam 100, the rear floor longitudinal beam 200, the rear panel and the rear floor reinforcement simultaneously participate in energy absorption. At this time, the low-speed collision energy is absorbed, and the rear floor longitudinal beam 200, the rear panel and the rear floor reinforcement structure are not damaged.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rear anti-collision beam, characterized in that: include: Two first anti-collision beams, each of which is provided with a first clamping portion; a second anti-collision beam, wherein the second anti-collision beam is sandwiched between the two first anti-collision beams, and the first anti-collision beam and the second anti-collision beam have different porosities, and second clamping parts are provided at both ends of the second anti-collision beam, and the first clamping part and the second clamping part are clamped and matched, and the first clamping part and the second clamping part are bonded and matched; A fastener is used to fix the first clamping portion and the second clamping portion.

2. The rear anti-collision beam according to claim 1, characterized in that: Also includes: The bushing comprises: a main body and an end portion, the main body and the end portion are connected to each other, the main body passes through the second clamping portion, and the end portion is clamped between the fastener and the second clamping portion.

3. The rear anti-collision beam according to claim 2, characterized in that: The wall thickness of the main body is t, and t satisfies the relationship: 2mm≤t≤5mm; and The diameter of the end portion is d1, the outer diameter of the main body portion is d2, the porosity of the second anti-collision beam is α, and the relationship between d1, d2 and α is: d1≥(d2+8mm) / (1-α).

4. The rear anti-collision beam according to claim 1, characterized in that: The first clamping portion is at least one protrusion, and the second clamping portion is at least one groove. The at least one protrusion and the at least one groove are plug-fitted with each other.

5. The rear anti-collision beam according to claim 4, characterized in that: The thickness of the first anti-collision beam and the second anti-collision beam is h1, the thickness of the protrusion and the groove is h2, and h1 and h2 satisfy the relationship: 40mm≤h1-h2≤80mm, 30mm≤h2≤50mm.

6. The rear anti-collision beam according to claim 4, characterized in that: The length of the protrusion and the width of the groove are h3, and h3 satisfies the relationship: 30mm≤h3≤50mm.

7. A vehicle, characterized in that: include: Body structure; The rear anti-collision beam according to any one of claims 1 to 6, wherein the rear anti-collision beam is fixed to the vehicle body structure.

8. The vehicle according to claim 7, characterized in that The vehicle body structure comprises: a rear panel and two rear floor longitudinal beams, wherein the rear panel is arranged between the two rear floor longitudinal beams, and the two ends of the rear anti-collision beam are respectively fixedly connected to the two rear floor longitudinal beams.

9. The vehicle according to claim 8, characterized in that A support boss is provided on the side of the second anti-collision beam facing the vehicle body structure. The vehicle body structure further includes: a rear floor reinforcement, which is arranged below the rear panel. The support boss and the rear floor reinforcement are arranged opposite to each other.

10. The vehicle according to claim 9, characterized in that The gap between the supporting boss and the rear floor reinforcement is h4, and h4 satisfies the relationship: 10mm≤h4≤20mm.

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