Rear anti-collision beam of integrated injection molding structure

Abstract

The utility model relates to the technical field of automobiles, in particular to a rear anti-collision beam with an integral injection molding structure, which comprises an anti-collision beam and energy absorption boxes, the anti-collision beam is integrally formed by injection molding, the energy absorption boxes are positioned on two sides of the anti-collision beam, and fiber boards are wrapped on the surfaces of the anti-collision beam and the energy absorption boxes. The anti-collision beam of the integrated injection molding structure is bent and is provided with the energy absorption box structure, the connection problem is solved, fasteners are omitted, the anti-collision beam of the integrated injection molding structure is wrapped by the fiberboard, and the anti-collision performance of the anti-collision beam is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a rear anti-collision beam with an integrated injection molding structure. Background Art

[0002] The car anti-collision beam is a device used to absorb collision energy in low-speed collisions to reduce vehicle damage. It is fixed to the longitudinal beam of the vehicle body by bolts. When a collision occurs, the anti-collision beam absorbs energy through collapse to reduce damage to the longitudinal beam of the vehicle body, so as to protect the main structure of the vehicle body and reduce maintenance costs. The rear anti-collision beam is the anti-collision beam covering the inside of the rear bumper at the rear of the vehicle. There are currently three main types of anti-collision beams commonly used on passenger cars: traditional steel anti-collision beams, GMT anti-collision beams designed for weight reduction, and aluminum alloy anti-collision beams that take into account both lightweight and high strength.

[0003] At present, GMT anti-collision beam is an existing all-plastic rear anti-collision beam, which is molded by GMT material and is a product that came into being under the trend of automobile lightweighting. This GMT material molded anti-collision beam has structural limitations in design, the low-speed collision performance of the main beam is average, and there is no real energy absorption box. The anti-collision beams commonly used in passenger cars at present must be parallel to each other at the connection position of the main beam and the energy absorption box, and both are flat to connect normally. Figure 1 As shown, for the curved structure, common connection methods such as bolt fixing cannot directly open holes on the curved surface, and can only increase the surface structure to install the energy absorption box on the anti-collision beam, thereby increasing the structure and volume of the anti-collision beam. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a rear anti-collision beam with an integrated injection molding structure, in which the main beam, energy absorption box and end plate are designed as an integrated injection molding structure, ensuring that the shape of the anti-collision beam can be bent and has an energy absorption box structure, eliminating fasteners and thus solving the connection problem.

[0005] The utility model provides an integral injection-molded rear anti-collision beam, comprising an anti-collision beam integrally formed by injection molding and energy absorption boxes located on both sides of the anti-collision beam, and fiberboard is wrapped on the surfaces of the anti-collision beam and the energy absorption box; wherein, reinforcing ribs are provided inside the anti-collision beam along the length and width directions of the anti-collision beam; an energy absorption box inner rib plate is provided inside the energy absorption box, and the energy absorption box inner rib plate divides the interior of the energy absorption box into a plurality of small cavities.

[0006] Furthermore, the density of the ribs inside the energy absorption box is greater than the density of the reinforcing ribs; the anti-collision beam is an outwardly convex arc structure, and the reinforcing ribs are evenly distributed inside the anti-collision beam.

[0007] Furthermore, the thickness of the fiberboard is not less than one layer, and the thickness of each layer of the fiberboard is in the range of 0.5 mm to 1 mm.

[0008] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0009] 1) The one-piece injection molding structure allows the main beam, energy absorption box, and end plate to be retained, increasing performance and reducing weight;

[0010] 2) The anti-collision beam with one-piece injection molding structure can be bent and has an energy absorption box structure, which solves the connection problem and eliminates the need for fasteners;

[0011] 3) Wrap the anti-collision beam of the integral injection-molded structure with fiberboard to enhance the anti-collision performance of the anti-collision beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the energy absorption box installed on the curved anti-collision beam;

[0013] Figure 2 It is a three-dimensional diagram of a rear anti-collision beam of an integral injection molding structure provided according to an embodiment of the utility model;

[0014] Figure 3 It is a bottom view of a rear anti-collision beam of an integral injection molding structure provided according to an embodiment of the utility model;

[0015] Figure 4 It is a side view of a rear anti-collision beam of an integral injection molding structure provided according to an embodiment of the utility model.

[0016] Figure numerals: anti-collision beam 1, energy absorption box 2, fiberboard 3, reinforcing rib 4, inner rib plate of energy absorption box 5, bolt 6. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and do not constitute a limitation of the utility model.

[0018] The utility model provides an integral injection-molded rear anti-collision beam, in which the main beam, energy absorption box and end plate are designed as an integral injection-molded structure, so that the anti-collision beam can be bent and has an energy absorption box structure, eliminating fasteners and thus solving the connection problem. The integral injection-molded anti-collision beam is wrapped with fiberboard to enhance the anti-collision performance of the anti-collision beam.

[0019] Figure 2 to Figure 4 The three-dimensional structure, the upward view structure and the side view structure of the rear anti-collision beam of the integral injection molding structure provided according to the embodiment of the utility model are respectively shown.

[0020] like Figure 2 to Figure 4As shown, the rear anti-collision beam of the integral injection molding structure provided by the embodiment of the utility model comprises an anti-collision beam 1 and energy absorption boxes 2 located on both sides of the anti-collision beam 1. The anti-collision beam 1 and the energy absorption box 2 are integrally formed by injection molding, and the fiberboard 3 is wrapped on the surface of the anti-collision beam 1 and the energy absorption box 2.

[0021] Preferably, the anti-collision beam 1 adopts an outwardly convex arc structure, and a reinforcing rib 4 is provided inside the anti-collision beam 1 along the length and width direction of the anti-collision beam 1. The reinforcing rib 4 is evenly distributed inside the anti-collision beam 1.

[0022] The energy absorbing box 2 is provided with an inner rib plate 5, and the distribution density of the inner rib plate 5 is greater than the distribution density of the reinforcing rib 4. The inner rib plate 5 of the energy absorbing box divides the interior of the energy absorbing box 2 into a plurality of small cavities for absorbing external impact force.

[0023] The thickness of the fiberboard 3 is not less than one layer, and the thickness of each layer of the fiberboard 3 is in the range of 0.5-1 mm.

[0024] In the embodiment of the utility model, PP+GF30 material is used to obtain the injection-molded anti-collision beam 1 and energy absorption box 2. A layer of fiberboard with a thickness of 1 mm is used and wrapped on the surface of the anti-collision beam 1 and the energy absorption box 2 through a pre-embedded injection molding process.

[0025] Among them, the energy absorption boxes 2 at both ends of the anti-collision beam 1 are low-speed energy absorption boxes that are integrally injection-molded and have very low yield strength. The energy absorption boxes 2 are then connected to the vehicle body longitudinal beam by bolts, so that the rear anti-collision beam with an integral injection-molded structure provided by the utility model is installed on the vehicle body longitudinal beam.

[0026] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A rear anti-collision beam with an integrated injection molding structure, It is characterized in that It includes an injection-molded anti-collision beam and energy absorption boxes located on both sides of the anti-collision beam, and fiberboard is wrapped on the surfaces of the anti-collision beam and the energy absorption box; wherein, reinforcing ribs are provided inside the anti-collision beam along the length and width directions of the anti-collision beam; an energy absorption box inner rib plate is provided inside the energy absorption box, and the energy absorption box inner rib plate divides the interior of the energy absorption box into multiple small cavities.

2. The rear anti-collision beam of the one-piece injection molding structure according to claim 1, It is characterized in that The density of the rib plate inside the energy absorption box is greater than the density of the reinforcing ribs; the anti-collision beam is an outwardly convex arc structure, and the reinforcing ribs are evenly distributed inside the anti-collision beam.

3. The rear anti-collision beam of the integral injection molding structure according to claim 1, It is characterized in that The thickness of the fiberboard is not less than one layer, and the thickness of each layer of the fiberboard is in the range of 0.5mm-1mm.

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