CN214215713U

CN214215713U - Lower protective cross beam of commercial vehicle

Info

Publication number: CN214215713U
Application number: CN202120008318.XU
Authority: CN
Inventors: 白大成; 朱禹鹏; 丁旭; 潘东野; 梁彦儒; 陈万宝
Original assignee: Changchun Sanyou Zhizao Science & Technology Development Co ltd
Current assignee: Changchun Sanyou Zhizao Science & Technology Development Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-09-17
Anticipated expiration: 2031-01-05

Abstract

The utility model relates to a protection crossbeam under commercial car comprises lower protection main part and support, and lower protection main part is by first surface felt layer, first multiaxial fibre cloth layer, cellosilk layer, second multiaxial fibre cloth layer and second surface felt layer are layed in proper order to soak with polyurethane resin and wherein heat the solidification and form, are the tubular structure, and the cross section is inside non-uniform thickness's I shape structure, and its middle part supports and is greater than other wall thicknesses, still is equipped with the muscle cloth layer in the cellosilk in-situ that the middle part supported. The utility model has the advantages of good weight reducing effect of the lower protective beam of the commercial vehicle, corrosion resistance, rust resistance, no corrosion and pulverization of products and other problems; the cost is reduced, the product is molded at one time, and no complex working procedure is required; the product structure is formed by glass fiber layering and fiber filament pultrusion, the impact resistance embrittlement performance is good, and the impact resistance is greatly improved; compared with a metal component, the non-metal composite material has good energy absorption characteristic, and the injury to the human body during impact is greatly reduced.

Description

Lower protective cross beam of commercial vehicle

Technical Field

The utility model belongs to the technical field of the car protection, concretely relates to protection crossbeam under commercial car.

Background

The front lower protection device is a device which is connected with a frame by a bracket and consists of cross members, is an independent assembly structure on an automobile and is also one of larger covering parts. The safety protection, the integral modeling and the aerodynamic characteristics of the vehicle are greatly influenced. The front lower protection device is a main collision element of automobile traffic accidents, companies at home and abroad pay less attention to lightweight research of the front lower protection device, and the front lower protection device mainly focuses on analysis of collision performance.

The existing lower protective devices are mostly of metal structures, although certain progress has been made in the aspects of steel development and application in China, a complete product series is not formed, and the problems of surface quality, corrosion resistance, self weight, fatigue resistance and environmental protection are still solved. Meanwhile, the lower protection device of the metal structure has high rigidity, and is very easy to cause damage to vehicles and personnel when collision happens.

The resin matrix raw material is isocyanate polyurethane, the source is wide, no solvent is used in the production process, no toxic volatile is generated, and the environmental pressure is low; the gelation and curing time of the polyurethane polymerization process is short, and the adjustment can be carried out in a small range, so that the polyurethane polymerization process is suitable for rapid production; the polyurethane is a thermosetting material, is an insoluble and infusible system, and has the advantages of solvent resistance, hydrolysis resistance, acid and alkali resistance; the thermosetting material has good creep resistance, and the amide group has high heat resistance, good impact and embrittlement resistance and good low-temperature mechanical properties. Is superior to other materials in environmental protection and material performance, and accords with the development trend of future commercial vehicles. If a front lower protection device which is reliable in strength, light in weight and capable of absorbing energy in collision can be developed by using a novel synthetic material, the front lower protection device is significant and has wide application value.

Disclosure of Invention

An object of the utility model is to provide a protection crossbeam under commercial car to overcome current protector down and be not conform to the lightweight demand, corrosion resistance, fatigue resistance, feature for environmental protection and the poor problem of collision energy-absorbing ability.

The utility model aims at realizing through the following technical scheme:

a lower protective beam of a commercial vehicle comprises a lower protective main body 1 and a bracket 2; the bracket 2 is fixed on the lower protection main body 1 through a nut 3;

the lower protection main body 1 is formed by sequentially laying a first surface felt layer 11, a first multi-axial fiber cloth layer 12, a fiber yarn layer 13, a second multi-axial fiber cloth layer 14 and a second surface felt layer 15, soaking the fiber yarn layer in polyurethane resin, and heating and curing the fiber yarn layer;

the lower protection main body 1 is of a tubular structure, the cross section of the lower protection main body is of an I-shaped structure with unequal internal thickness, the middle support is thicker than other walls, and a rib cloth layer 16 is further arranged in the fiber layer 13 supported in the middle;

the fiber yarn layer 13 is uniformly distributed in 0-degree layering, and the first surface felt layer 11, the first multi-axial fiber cloth layer 12, the second multi-axial fiber cloth layer 14, the second surface felt layer 15 and the reinforcement cloth layer 16 are all 0-degree layering, 45-degree layering, -45-degree layering and 90-degree layering.

Further, the first multiaxial fiber cloth layer 12 and the second multiaxial fiber cloth layer 14 are both a plurality of fiber cloth layers.

Further, the rib fabric layer 16 is a multi-fiber fabric layer.

Furthermore, the fiber cloth in the reinforced cloth layer 16 is 5-12 layers, the fiber yarn is 60-110 bundles, the top and bottom of the fiber cloth comprising the first multiaxial fiber cloth layer 12 and the second multiaxial fiber cloth layer 14 are 2-6 layers in total, the fiber yarn is 110-180 bundles, the left and right sides of the fiber cloth comprising the first multiaxial fiber cloth layer 12 and the second multiaxial fiber cloth layer 14 are 2-6 layers in total, and the fiber yarn is 90-150 bundles.

Further, the proportion of 0 ° ply, 45 ° ply, -45 ° ply and 90 ° ply of the first surface felt layer 11, first multiaxial scrim layer 12, second multiaxial scrim layer 14, second surface felt layer 15 and scrim layer 16 is 58%, 14%.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the lower protective beam of the utility model has good weight reducing effect, and reduces weight by 20-30% compared with the equivalent metal structural member;

2. corrosion resistance, no rustiness, no corrosion and pulverization of products and the like;

3. the cost is reduced, the product is molded at one time, and no complex working procedure is required;

4. the product structure is formed by glass fiber layering and fiber filament pultrusion, the resin matrix is made of isocyanate polyurethane, the impact resistance and embrittlement resistance are good, and the impact resistance is greatly improved.

5. Compared with a metal component, the non-metal composite material has good energy absorption characteristic, and the injury to the human body during impact is greatly reduced.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.

FIG. 1 is a schematic structural view of a commercial lower protective beam;

FIG. 2 is a front cross-sectional view of the shield body;

FIG. 3 is a schematic structural view of a glass fiber composite material of the lower protective body;

fig. 4 is a force bearing schematic diagram of the lower protective body.

In the figure, 1, a lower protective main body 2, a bracket 3, a bolt 11, a first surface felt layer 12, a first multiaxial fiber cloth layer 13, a fiber silk layer 14, a second multiaxial fiber cloth layer 15, a second surface felt layer 16 and a reinforcement cloth layer.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the lower protection crossbeam of the utility model comprises a lower protection main body 1 and a bracket 2; the bracket 2 is fixed on the lower protective body 1 through a nut 3.

The lower protection main body 1 is formed by sequentially laying a first surface felt layer 11, a first multi-axial fiber cloth layer 12, a fiber silk layer 13, a second multi-axial fiber cloth layer 14 and a second surface felt layer 15, soaking the fiber silk layer in polyurethane resin, and heating and curing the fiber silk layer.

The lower protection main body 1 is of a tubular structure, the cross section of the lower protection main body is of an I-shaped structure with unequal internal thickness, the middle support is larger than other wall thicknesses, and a rib cloth layer 16 is further arranged in the fiber layer 13 supported by the middle support.

Specifically, the first multiaxial fiber cloth layer 12 and the second multiaxial fiber cloth layer 14 are both a plurality of fiber cloth layers. The reinforced cloth layer 16 is a multi-fiber cloth layer. The fiber cloth in the reinforced cloth layer 16 is 5-12 layers, the fiber yarn is 60-110 bundles, the fiber cloth with the first multi-axial fiber cloth layer 12 and the second multi-axial fiber cloth layer 14 at the top and the bottom is 2-6 layers, the fiber yarn is 110-180 bundles, the fiber cloth with the first multi-axial fiber cloth layer 12 and the second multi-axial fiber cloth layer 14 at the left and the right is 2-6 layers, and the fiber yarn is 90-150 bundles.

Specifically, because the fiber cloth layering is multiaxial, the fiber cloth layering is obtained by comprehensive calculation: the proportion of 0 degree ply, 45 degree ply, -45 degree ply and 90 degree ply of the first surface felt layer 11, the first multiaxial fiber cloth layer 12, the second multiaxial fiber cloth layer 14, the second surface felt layer 15 and the reinforcement cloth layer 16 is 58%, 14% and 14%.

As shown in FIG. 3, the fiber cloth of the present invention has about 2-6 layers (the total number of layers is not the symmetrical layer, and the total number of the inner and outer 2 layers of fiber cloth layers is 2-6 fiber cloth layers), and the fiber cloth of the middle rib cloth layer 16 has about 5-12 layers (total).

The utility model discloses a lower protection main part 1 adopts first surface felt layer 11, first multiaxial fibre cloth layer 12, cellosilk layer 13, second multiaxial fibre cloth layer 14, second surface felt layer 15 and muscle cloth layer 16 to take the mixture of resin, filler and curing agent to get into the fashioned structural style of heating mould curing through the silo. The weight reduction can reach 20% -30%, the lightweight design concept and requirements are greatly met, and the fuel consumption of the commercial vehicle is reduced. The lower protection body 1 is a main force bearing structure, and the loading mode thereof is three-point loads of P1, P2 and P3, which is schematically shown in FIG. 4. The deformation, the fiber direction failure and the stability of the fiber meet the requirements in an impact force test, and the results are as follows:

TABLE 1

Loading mode	Deformation (mm)
		P1	30.086
P2	5.727
		P3	11.278

TABLE 2

Loading mode	Max stress E-UD
		P1	485MPa
P2	355.Mpa
		P3	-355Mpa

TABLE 3

Loading mode	Load multiplier	Location of occurrence
			P1	1.995	Two ends
P2	1.366	On the loading position skin-top
			P3	2.842	On the loading position skin-left

As can be seen from tables 1 to 3, the present invention has excellent impact resistance and weight reduction effects.

To sum up, the utility model discloses there are good shock resistance and energy-absorbing effect, subtract heavy effectual, corrosion-resistant, nonrust loses, and the materials environmental protection, simple structure easily processes.

The utility model discloses the installation is dismantled the process and only needs 1 workman to realize, has reduced the manpower loss.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a protection crossbeam under commercial car which characterized in that: comprises a lower protection main body (1) and a bracket (2); the support (2) is fixed on the lower protection main body (1) through a nut (3);

the lower protection main body (1) is formed by sequentially laying a first surface felt layer (11), a first multi-axial fiber cloth layer (12), a fiber yarn layer (13), a second multi-axial fiber cloth layer (14) and a second surface felt layer (15), soaking the fiber yarn layer in polyurethane resin, and heating and curing the fiber yarn layer;

the lower protection main body (1) is of a tubular structure, the cross section of the lower protection main body is of an I-shaped structure with unequal inner thickness, the middle support is thicker than other walls, and a rib cloth layer (16) is further arranged in the fiber layer (13) supported by the middle support;

the fiber yarn layer (13) is uniformly distributed in a 0-degree layer, and the first surface felt layer (11), the first multi-axial fiber cloth layer (12), the second multi-axial fiber cloth layer (14), the second surface felt layer (15) and the reinforcement cloth layer (16) are all 0-degree layers, 45-degree layers, -45-degree layers and 90-degree layers.

2. The commercial vehicle lower protective cross beam of claim 1, wherein: the first multiaxial fiber cloth layer (12) and the second multiaxial fiber cloth layer (14) are both multi-fiber cloth laying layers.

3. The commercial vehicle lower guard beam of claim 2, wherein: the reinforced cloth layer (16) is a multi-fiber cloth laying layer.

4. A commercial vehicle lower guard rail according to claim 3, characterised in that: the fiber cloth in the reinforced cloth layer (16) is 5-12 layers, the fiber yarns are 60-110 bundles, the fiber cloth with the top and the bottom comprising the first multi-axial fiber cloth layer (12) and the second multi-axial fiber cloth layer (14) is 2-6 layers in total, the fiber yarns are 110-180 bundles, the fiber cloth with the left side and the right side comprising the first multi-axial fiber cloth layer (12) and the second multi-axial fiber cloth layer (14) is 2-6 layers in total, and the fiber yarns are 90-150 bundles.

5. The commercial vehicle lower protective cross beam of claim 1, wherein: the proportion of 0-degree ply, 45-degree ply, -45-degree ply and 90-degree ply of the first surface felt layer (11), the first multiaxial fiber cloth layer (12), the second multiaxial fiber cloth layer (14), the second surface felt layer (15) and the reinforcement cloth layer (16) is 58%, 14% and 14%.