Front bumper and commercial vehicle

Abstract

The invention provides a front bumper and a commercial vehicle. The front bumper comprises a framework, a lower decoration plate and a body, the framework comprises an upper cross beam, a lower cross beam located below the upper cross beam, supporting plates connected to the two ends of the upper cross beam and the two ends of the lower cross beam and side wings connected to the outer ends of the supporting plates, and a first installation space is formed among the upper cross beam, the lower cross beam and the two supporting plates. A second installation space is formed between the lower end of the lower cross beam and the two supporting plates, the body is detachably installed in the first installation space, and the lower decoration plate is detachably installed in the second installation space. The front bumper is designed to be of a split structure with the framework, the lower decoration plate and the body, the framework can adopt a metal plate welding and stamping mode, the lower decoration plate and the body can adopt a PP injection molding or SMC compression molding mode, overall stamping of the bumper is not needed, the stamping machining difficulty is reduced, the structure of a stamping die is simplified, and the die cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of commercial vehicles, and in particular to a front bumper and a commercial vehicle. Background Art

[0002] The iron front bumper of commercial vehicles is a front protection device for the vehicle. Its design and material selection are to effectively absorb and disperse the anti-collision force in the event of a collision, thereby reducing the direct impact on the vehicle body and protecting the vehicle from damage. Due to its high strength and durability, the iron bumper can resist external impact to a certain extent, protecting the structural integrity of the vehicle and the safety of personnel.

[0003] Commercial vehicle bumpers generally adopt an integral stamped sheet metal structure, but when the bumper's exterior shape is a complex curved surface, the integral stamping process is difficult to achieve, resulting in the processing failing to meet technical requirements. Summary of the invention

[0004] The object of the present invention is to provide a front bumper and a commercial vehicle capable of realizing a complex curved surface, which is convenient for processing.

[0005] The technical solution of the present invention is: a front bumper, including a frame, a lower decorative plate and a main body, the frame including an upper cross beam, a lower cross beam located below the upper cross beam, a support plate connected to both ends of the upper cross beam and the lower cross beam, and a side wing connected to the outer end of the support plate, a first installation space is formed between the upper cross beam, the lower cross beam and the two support plates, a second installation space is formed between the lower end of the lower cross beam and the two support plates, the main body can be detachably installed in the first installation space, and the lower decorative plate can be detachably installed in the second installation space.

[0006] In the above scheme, the front bumper is designed as a split structure with a frame, a lower trim, and a main body, so that the support plate and the cross beam in the frame can be welded, the side wings can be stamped by sheet metal, and the lower trim and the main body can be formed by PP injection molding or SMC compression molding. There is no need to stamp the bumper as a whole, which reduces the difficulty of the stamping process, simplifies the structure of the stamping die, and reduces the die cost. The lower trim, the main body and the frame can be installed detachably. When the vehicle is impacted, the lower trim and the main body can be replaced as needed, saving maintenance costs and reducing maintenance difficulty.

[0007] Preferably, the upper end of the main body is connected to the upper cross beam, the left and right ends of the main body are connected to support plates at corresponding positions, and the lower end of the main body and the upper end of the lower decorative plate are commonly connected to the lower cross beam.

[0008] Preferably, first connecting edges are provided at both ends of the main body, fourth connecting edges are provided at both ends of the lower decorative plate, and the first connecting edge and the fourth connecting edge are connected to the side wings.

[0009] Preferably, a second connecting edge is provided at the bottom of the main body, and a third connecting edge connected to the second connecting edge is provided at the top of the lower decorative panel.

[0010] Preferably, the side wings and the main body are arc-shaped plates on the same arc surface.

[0011] Preferably, the bottom of the lower decorative panel is flush with the bottom of the side wing.

[0012] Preferably, a first mounting hole for mounting a headlight is provided on the side wing.

[0013] Preferably, the frame is a metal part, and the body and the lower decorative panel are plastic parts or fiberglass parts.

[0014] The present invention also provides a commercial vehicle, comprising a cab and the above-mentioned front bumper arranged at the front end of the cab.

[0015] Compared with the related art, the present invention has the following beneficial effects: 1. Design the front bumper as a split structure with a frame, a lower trim, and a body. The support plate and the crossbeam in the frame can be welded, the side wings can be stamped sheet metal, and the lower trim and the body can be PP injection molded or SMC molded. There is no need to stamp the bumper as a whole, which reduces the difficulty of stamping processing, simplifies the structure of the stamping die, and reduces the die cost; 2. The lower trim, body and frame can be installed detachably. When the vehicle is impacted, the lower trim and body can be replaced as needed, saving maintenance costs and reducing maintenance difficulty. 3. The front bumper is designed as a split structure with a frame, a lower trim, and a main body. The frame improves the strength and durability so that it can bear a certain amount of impact and pressure to protect the vehicle from damage; 4. The use of a metal frame can improve the strength and durability of the front bumper, can resist external impact to a certain extent, and protect the structural integrity of the vehicle and the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front structural schematic diagram of the front bumper provided by the present invention; Figure 2 A schematic diagram of the three-dimensional structure of the front bumper provided by the present invention from a first viewing angle; Figure 3 A schematic diagram of the three-dimensional structure of the front bumper provided by the present invention from a second viewing angle; Figure 4 An exploded schematic diagram of the front bumper provided by the present invention; Figure 5 is a schematic diagram of the structure of the skeleton; Figure 6CAE simulation analysis model diagram for the front bumper; Figure 7 This is the deformation and stress distribution diagram of the front bumper during static strength analysis; Figure 8 This is the deformation and stress distribution diagram of the front bumper during modal analysis; Fig. 9 The deformation and stress distribution diagram of the front bumper during dynamic strength analysis (I); Fig.10 The deformation and stress distribution diagram of the front bumper during dynamic strength analysis (II); Fig.11 The deformation and stress distribution diagram of the front bumper during dynamic strength analysis (III).

[0017] In the accompanying drawings: 1. frame; 11. side wings; 12. upper crossbeam; 13. lower crossbeam; 14. first installation space; 15. second installation space; 16. support plate; 17. first installation hole; 2. lower decorative panel; 21. third connecting edge; 22. fourth connecting edge; 3. main body; 31. first connecting edge; 32. second connecting edge. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0019] like Figure 1-Figure 4 As shown, the front bumper provided in this embodiment includes a frame 1, a lower trim 2 and a body 3. Figure 5 As shown, the skeleton 1 includes an upper cross beam 12, a lower cross beam 13 located below the upper cross beam 12, support plates 16 connected to both ends of the upper cross beam 12 and the lower cross beam 13, and side wings 11 connected to the outer ends of the support plates 16. A first installation space 14 is formed between the upper cross beam 12, the lower cross beam 13 and the two support plates 16, and a second installation space 15 is formed between the lower end of the lower cross beam 13 and the two support plates 16.

[0020] The upper crossbeam 12, the lower crossbeam 13 and the support plate 16 are welded, and the side wing 11 and the support plate 16 are welded. The various parts of the skeleton 1 are processed by high-strength stamping sheet metal. The skeleton 1 with a metal structure can ensure that the commercial vehicle can operate on complex roads and harsh working conditions, and provide good durability and impact resistance. The skeleton 1 with a metal structure is stamped and welded from high-strength steel, and has the characteristics of high structural strength and good durability. The skeleton 1 with a metal structure can withstand a large impact force to prevent damage to the vehicle due to collision during driving. The skeleton 1 with a metal structure can cope with different working environments and road conditions, provide effective protection for commercial vehicles, and ensure driving safety and vehicle durability.

[0021] The side wing 11 is provided with a first mounting hole 17 for mounting a headlight. Figure 5 As shown, the side wings 11 at both ends are of symmetrical structure, and the support plates 16 at both ends are of symmetrical structure.

[0022] The lower trim panel 2 is detachably mounted in the second installation space 15. The fourth connecting edges 22 are vertically provided at both ends of the lower trim panel 2. The main body 3 is detachably mounted in the first installation space 14. The inner surface of the upper end of the main body 3 fits with the outer surface of the upper cross beam 12 and is detachably connected, and the inner surfaces of the left and right ends of the main body 3 fit with the outer surface of the support plate 16 at the corresponding position and are detachably connected. The first connecting edges 31 are vertically provided at the left and right ends of the main body 3. The first connecting edge 31 and the fourth connecting edge 22 are detachably connected to the side wing 11 by bolts or the like.

[0023] The lower inner surface of the body 3 and the upper inner surface of the lower decorative panel 2 are both in contact with the outer surface of the lower cross beam 13 and are detachably connected. A second connecting edge 32 is vertically extended at the bottom of the body 3, and a third connecting edge 21 is provided on the top of the lower decorative panel 2 to connect with the second connecting edge 32 by bolts or the like. Figure 1 As shown, the bottom of the lower decorative plate 2 is flush with the bottom of the side wing 11. The inner surfaces of the left and right ends of the lower decorative plate 2 are fitted with the outer surfaces of the side wing 11 and are detachably connected.

[0024] The above-mentioned detachable connection can be a connection method through bolts and nuts, the nuts are pre-buried in the glass fiber reinforced plastic, or a connection method through buckles and clamping rings, the clamping rings clamped with the buckles are pre-buried in the glass fiber reinforced plastic.

[0025] The side wing 11, the main body 3 and the lower trim 2 are arc-shaped plates on the same arc surface. The main body 3 and the lower trim 2 are made of plastic parts made of PP (Polypropylene) injection molding or glass fiber reinforced plastic parts made of SMC (Sheet Molding Compound) compression molding, which can play a buffering role in low-speed collisions, effectively protect the safety of passengers, and improve the lightweight and maintenance convenience of the vehicle. And when the vehicle is hit by a low-speed impact, the lower trim 2 and the main body 3 can be quickly replaced, saving maintenance time and cost. The main body 3 and the lower trim 2 are made of PP injection molding and SMC compression molding. Due to their high strength and good rigidity, they can play an effective buffering role in collisions, protect the safety of passengers and vehicles, and improve the convenience of maintenance.

[0026] The present invention provides a commercial vehicle, comprising a cab and the above-mentioned front bumper arranged at the front end of the cab.

[0027] The CAE simulation analysis items for the front bumper provided by the present invention are as follows: When checking the static strength of the step, the mass of the passenger of 75 kg is taken into account; It is required to check the front step of the bumper and analyze the bumper mode; At the same time, the local modes of the bumper after it is installed on the frame are analyzed, and a preliminary dynamic strength analysis is performed.

[0028] The materials used for the front bumper assembly are DC01, DC06, Q355, PP and fiberglass. Cut off the partial model of the front section of the frame and constrain the connection hole of the leaf spring mounting seat. The weight of the headlight is 3.25kg, and the weight of the fog lamp is 0.89kg. The model is as follows Figure 6 shown.

[0029] Static Strength Simulate the pedaling action of a person and load it with 2g. The deformation and stress are as follows Figure 7 When a load of 2G of a single person's weight acts on the stepping area, the maximum stress of the step bracket is 93MPa and the maximum deformation is 1.6mm. The material of the step bracket is Q235, the safety factor is 2.5, and the static strength meets the requirements.

[0030] Modal The local mode of the bumper assembly installed at the front end of the frame is as follows: Figure 8 As shown in the figure, the first-order modal frequency is 32Hz, and the resonance risk is relatively small. It is generally required that the first-order modal frequency of the bumper is not less than 20Hz, and the mode meets the empirical requirements.

[0031] Dynamic Strength The accelerations are applied to the bumper assembly installation parts, where X is 2.5G, Y is 2.8G, and Z is 1.5G. The results of the three-direction excitation are as follows: Fig. 9 , Fig.10 , Fig.11 As shown, the stress of the bumper welding bracket is required to be less than the yield strength of the part material.

[0032] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A front bumper, characterized in that: The invention comprises a frame (1), a lower decorative plate (2) and a body (3); the frame (1) comprises an upper crossbeam (12), a lower crossbeam (13) located below the upper crossbeam (12), a support plate (16) connected to both ends of the upper crossbeam (12) and the lower crossbeam (13), and a side wing (11) connected to the outer end of the support plate (16); a first installation space (14) is formed between the upper crossbeam (12), the lower crossbeam (13) and the two support plates (16); a second installation space (15) is formed between the lower end of the lower crossbeam (13) and the two support plates (16); the body (3) is detachably installed in the first installation space (14); and the lower decorative plate (2) is detachably installed in the second installation space (15).

2. The front bumper according to claim 1, characterized in that: The upper end of the body (3) is connected to the upper crossbeam (12), the left and right ends of the body (3) are connected to support plates (16) at corresponding positions, and the lower end of the body (3) and the upper end of the lower decorative plate (2) are connected to the lower crossbeam (13).

3. The front bumper according to claim 1, characterized in that: The two ends of the body (3) are provided with first connecting edges (31), the two ends of the lower decorative plate (2) are provided with fourth connecting edges (22), and the first connecting edge (31) and the fourth connecting edge (22) are connected to the side wing (11).

4. The front bumper according to claim 1, characterized in that: The bottom of the body (3) is provided with a second connecting edge (32), and the top of the lower decorative plate (2) is provided with a third connecting edge (21) connected to the second connecting edge (32).

5. The front bumper according to claim 1, characterized in that: The side wings (11) and the main body (3) are arc-shaped plates on the same arc surface.

6. The front bumper according to claim 1, characterized in that: The bottom of the lower decorative panel (2) is flush with the bottom of the side wing (11).

7. The front bumper according to claim 1, characterized in that: The side wing (11) is provided with a first mounting hole (17) for mounting a headlight.

8. The front bumper according to claim 1, characterized in that: The frame (1) is a metal part, and the body (3) and the lower decorative plate (2) are plastic parts or fiberglass parts.

9. A commercial vehicle, comprising a cab, characterized in that: It also includes a front bumper as described in any one of claims 1-8, which is arranged at the front end of the cab.

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