Automobile bumper based on thermoplastic composite material

Abstract

The utility model discloses an automobile bumper based on a thermoplastic composite material, which relates to the technical field of automobile bumpers, and comprises a bumper shell, a buffer component assembled behind the bumper shell, three groups of buffer airbags, and a gas generator fixedly mounted on one side of each buffer airbag. The gas generator is connected with the gas conveying pipe through a gas inlet pipe on one side, the exhaust pipe is fixedly connected to the other side of the buffering air bag, the gas release valve is arranged above the exhaust pipe, and a sliding groove is formed in the inner side of the supporting plate. When the bumper is collided, the gas generator is rapidly started and inflates gas into the buffer airbag through the gas inlet pipe and the gas conveying pipe, so that the buffer airbag is rapidly expanded, a large-area buffer area is formed between the bumper and a collided object, energy generated by collision is effectively absorbed and dispersed, impact force of collision on the bumper and a vehicle body is reduced, and therefore the safety of the vehicle and passengers is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile bumper, specifically to a kind of automobile bumper based on thermoplastic composite. BACKGROUND

[0002] With the continuous progress of material science and technology, the performance of thermoplastic composite will be continuously improved, and the cost will gradually decrease. In the future, automobile bumpers based on thermoplastic composite will develop towards high performance, multi-function, lightweight and environmental protection. At the same time, integrated design and manufacturing with other automobile parts will also become a development trend.

[0003] The applicant found that a kind of automobile bumper based on thermoplastic composite has been disclosed in Chinese patent, with publication (announcement) number CN111303620A. The patent mainly uses impact-resistant composite material, rigid composite material and energy-absorbing material to manufacture the front panel, crossbeam and support framework and foam material of the automobile bumper. The front panel and crossbeam effectively improve the impact resistance and deformation resistance of the bumper through the design of different carbon fibers and the design of weaving structure. The three-dimensional composite material framework in the middle effectively improves the impact energy absorption efficiency of the bumper, ensuring the overall impact resistance and safety.

[0004] When the vehicle collides with the obstacle at a certain speed, the bumper will directly bear a huge impact force, causing the bumper to break or deform seriously. Due to the uneven damage and deformation of the bumper, local stress concentration is caused, which leads to the rapid destruction of thermoplastic composite under the action of local stress concentration, and the bumper cannot effectively absorb and disperse the collision energy, thereby reducing the safety and stability of the vehicle in the collision accident. Therefore, we propose a kind of automobile bumper based on thermoplastic composite. UTILITY MODEL CONTENT

[0005] The utility model is to provide a kind of automobile bumper based on thermoplastic composite.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of bumper based on thermoplastic composite, including bumper shell, bumper shell rear is equipped with buffer assembly, buffer assembly includes buffer air bag, gas generator, air inlet pipe, gas pipe, exhaust pipe, air release valve, support plate, sliding slot, sliding plate and clamping rod, buffer air bag is provided with three groups, gas generator is fixedly installed in one side of buffer air bag, gas generator is connected with gas pipe by one side air inlet pipe, exhaust pipe is fixedly connected to the other side of buffer air bag, air release valve is arranged above exhaust pipe, sliding slot is formed in the inner side of support plate, support plate and sliding plate are closely attached, support plate and sliding plate are provided with four groups, clamping rod is arranged in the inner wall of sliding plate, the position of clamping rod and sliding slot is corresponding.

[0007] As a further scheme of the utility model: the rear of the buffer air bag is provided with a buffer energy-absorbing layer, and the buffer energy-absorbing layer is made of foamed polypropylene material.

[0008] As a further scheme of the utility model: the rear of the buffer energy-absorbing layer is equipped with a crash beam, and a plurality of springs are arranged between the crash beam and the buffer energy-absorbing layer.

[0009] As a further scheme of the utility model: the rear of the crash beam is fixedly provided with mounting plates on both sides, the crash beam is made of carbon fiber reinforced thermoplastic plastic, the rear of the mounting plate is fixedly provided with a bottom plate, the mounting plate and the bottom plate are provided with two groups, mounting holes are formed in the mounting plate and the bottom plate, and a plurality of mounting holes are arranged in the mounting holes.

[0010] As a further scheme of the utility model: the rear of the bumper shell is provided with a bumper inner shell, the bumper shell and the bumper inner shell are made of modified polypropylene material, a reinforcing layer is arranged between the bumper shell and the bumper inner shell, and a collision sensor is arranged at the rear of the bumper inner shell.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1、the utility model discloses a bumper shell rear is equipped with buffer assembly, buffer assembly includes buffer air bag, gas generator, air inlet pipe, gas pipe, exhaust pipe, air release valve, support plate, sliding slot, sliding plate and clamping rod, buffer air bag is provided with three groups, gas generator is fixedly installed in one side of buffer air bag, gas generator is connected with gas pipe by one side air inlet pipe, exhaust pipe is fixedly connected to the other side of buffer air bag, air release valve is arranged above exhaust pipe, sliding slot is formed in the inner side of support plate, support plate and sliding plate are closely attached, support plate and sliding plate are provided with four groups, clamping rod is arranged in the inner wall of sliding plate, the position of clamping rod and sliding slot is corresponding.

[0013] 2. The utility model discloses through spring setting between the buffer energy absorption layer and the anti -collision beam, through buffer energy absorption layer first absorption and dispersion a part of collision energy, then through spring play the role of two -stage buffer, further absorption and dissipation the collision energy of remaining, the impact force of collision is gradually weakened, because buffer energy absorption layer and spring in the energy absorption process, reduce the direct impact of collision to the anti -collision beam to reduce the anti -collision beam and lead to fracture because of partial stress too big, thereby improve the anti -collision performance of car.

[0014] Other advantages, objects, and features of the present utility model will be in part apparent from the following description, and in part will be observed hereinafter, based on the accompanying drawings, which forms a part of the specification. It is, therefore, to be understood that changes in the details, the embodiments and the application generally can be made without departing from the spirit and scope of the application. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the right view three -dimensional schematic diagram in the embodiment of the utility model;

[0016] Figure 2 It is the left view three -dimensional schematic diagram in the embodiment of the utility model;

[0017] Figure 3 It is the front view schematic diagram in the embodiment of the utility model;

[0018] Figure 4 It is the top view schematic diagram in the embodiment of the utility model;

[0019] Figure 5 It is the right view schematic diagram in the embodiment of the utility model.

[0020] In the drawing: 1, bumper shell;101, reinforcing layer;102, bumper inner shell;103, collision sensor;2, buffer assembly;201, buffer air bag;202, gas generator;203, air inlet pipe;204, gas delivery pipe;205, exhaust pipe;206, air release valve;207, support plate;208, sliding groove;209, sliding plate;210, clamping rod;3, buffer energy absorption layer;4, spring;5, anti -collision beam;6, mounting plate;7, bottom plate;8, mounting hole. DETAILED DESCRIPTION

[0021] The specific embodiments of the present utility model will be further described below in conjunction with the drawings, and it needs to be explained here that the description of these embodiments is used to help understanding the present utility model, but does not constitute the limitation to the present utility model.

[0022] In addition, the technical features involved in each embodiment of the present utility model described below can be combined with each other as long as there is no conflict between them.

[0023] Please refer to the accompanying Figure 1 - theFigure 5 The utility model relates to a kind of automobile bumper based on thermoplastic composite, including bumper shell 1, before saying as Figure 1 、 Figure 2 As shown, bumper shell 1 rear assembly has buffer assembly 2, buffer assembly 2 includes buffer air bag 201, gas generator 202, air inlet pipe 203, gas pipe 204, exhaust pipe 205, air release valve 206, support plate 207, sliding slot 208, sliding plate 209 and clamping rod 210, buffer air bag 201 is provided with three groups, gas generator 202 is fixedly installed in one side of buffer air bag 201, gas generator 202 is connected with gas pipe 204 by one side air inlet pipe 203, exhaust pipe 205 is fixedly connected to the other side of buffer air bag 201, air release valve 206 is set on the upper side of exhaust pipe 205, sliding slot 208 is set in the inner side of support plate 207, support plate 207 and sliding plate 209 are closely attached, support plate 207 and sliding plate 209 are all provided with four groups, clamping rod 210 is set in the inner wall of sliding plate 209, clamping rod 210 and the position of sliding slot 208 correspond, when vehicle collision occurs, the collision signal monitored by collision sensor 103 is transmitted to gas generator 202, gas generator 202 is started instantly after receiving signal, gas is injected into buffer air bag 201 by air inlet pipe 203 and gas pipe 204, along with the large influx of gas, buffer air bag 201 expands rapidly, and the expansion force generated thereby will pull sliding plate 209, at this time, the clamping rod 210 in the inner side of sliding plate 209 will slide outward in the sliding slot 208 on support plate 207, so that sliding plate 209 extends outward along the direction of sliding slot 208, thereby further expanding the buffer range and stability of buffer assembly 2, effectively enhancing its absorption and dispersion capacity to collision energy, and after buffer air bag 201 completes the buffer task, the gas in buffer air bag 201 is discharged through exhaust pipe 205 by the control of air release valve 206, along with the discharge of gas, buffer air bag 201 gradually shrinks, sliding plate 209 is affected by the shrinkage force of buffer air bag 201, clamping rod 210 reversely slides in sliding slot 208, so that sliding plate 209 returns to initial position, ensuring that buffer assembly 2 always maintains stable installation position in bumper, whether in the expansion process when collision occurs or the shrinkage reset process after buffer ends, so that buffer air bag 201 is always in the best working state, greatly improving the buffer effect and reliability of entire buffer assembly 2 in the collision process.

[0024] In embodiment one, bumper absorbing energy layer 3 rear assembly has anti-collision beam 5, and a plurality of springs 4 are arranged between anti-collision beam 5 and bumper absorbing energy layer 3.

[0025] Specifically, the spring 4 is arranged between the buffer energy-absorbing layer 3 and the bumper beam 5. When the collision force is transmitted to the buffer energy-absorbing layer 3, the buffer energy-absorbing layer 3 first absorbs and disperses a part of the collision energy, thereby playing a role of preliminary buffering. Then, the spring 4 plays a role of secondary buffering between the buffer energy-absorbing layer 3 and the bumper beam 5, thereby further absorbing and dissipating the remaining collision energy, and gradually reducing the impact force generated by the collision. Since the buffer energy-absorbing layer 3 and the spring 4 reduce the direct impact of the collision on the bumper beam 5 during the energy absorption process, the local stress of the bumper beam 5 is reduced, thereby preventing the bumper beam 5 from being broken due to the local stress being too large, and thus the crashworthiness of the automobile is improved.

[0026] In the second embodiment, the bumper beam 5 is made of carbon fiber reinforced thermoplastic plastic, and the bumper beam 5 is fixedly installed with two mounting plates 6 at the back of the two sides of the bumper beam 5. The mounting plate 6 is fixedly installed with a bottom plate 7 at the back of the mounting plate 6. The mounting plate 6 and the bottom plate 7 are both provided with two groups of mounting holes 8. The mounting holes 8 are provided with a plurality of mounting holes 8.

[0027] Specifically, the mounting holes 8 arranged in the mounting plate 6 and the bottom plate 7 are used when the bumper is installed on the automobile. The mounting plate 6 and the bottom plate 7 are placed in the corresponding installation positions. Then, the bolts are inserted into the mounting holes 8, and the nuts are fastened, so that the bumper and the automobile body are stably connected. The bumper beam 5 is made of carbon fiber reinforced thermoplastic plastic, which has the advantages of high strength, low density, good corrosion resistance and impact resistance. Therefore, the bumper beam 5 can effectively absorb and dissipate energy during the collision, and at the same time, the weight of the automobile body is reduced, and the fuel economy and handling performance of the vehicle are improved.

[0028] In the third embodiment, the bumper shell 1 is provided with a bumper inner shell 102 at the back of the bumper shell 1. The bumper shell 1 and the bumper inner shell 102 are both made of modified polypropylene material. A reinforcing layer 101 is arranged between the bumper shell 1 and the bumper inner shell 102. A collision sensor 103 is arranged at the back of the bumper inner shell 102.

[0029] Specifically, the bumper shell 1 and the bumper inner shell 102 are made of modified polypropylene material, which improves the toughness and impact resistance of the bumper. The reinforcing layer 101 arranged between the bumper shell 1 and the bumper inner shell 102 can effectively increase the overall strength and rigidity of the bumper. When a large impact force is encountered during the collision, the reinforcing layer 101 can prevent the bumper shell 1 and the bumper inner shell 102 from being excessively deformed or broken, so that the bumper can better withstand and transmit the collision force. At the same time, the collision sensor 103 monitors whether the automobile has collided, and transmits the monitored signal to the gas generator 202.

[0030] Working principle:

[0031] First, when the car collides, the signal monitored by the collision sensor 103 is transmitted to the gas generator 202, and the gas is delivered to the buffer air bag 201 through the gas delivery pipe 204 and the gas inlet pipe 203, the buffer air bag 201 is inflated by the gas entering, and the clamping rod 210 is pulled to slide in the sliding groove 208, so that the sliding plate 209 extends outward, and the buffer air bag 201 is further buffered, when the collision force enters the buffer air bag 201 through the buffer air bag 201, the buffer energy absorption layer 3 absorbs the collision force, and then the spring 4 absorbs the remaining collision force, preventing the collision force from being directly transmitted to the anti-collision beam 5, thereby avoiding direct damage to the car, thereby improving the collision force of the car, and the entire working process ends.

[0032] The above front, rear, left, right, up and down are based on the drawings of the specification Figure 1 As a standard, the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the 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, therefore it cannot be understood as a limitation on the protection scope of the present application.

[0034] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the described embodiments.

[0035] For those skilled in the art, various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A car bumper based on thermoplastic composite material, comprising a bumper shell (1), characterized in that: The bumper shell (1) is fitted with a buffer assembly (2) at the rear. The buffer assembly (2) includes a buffer airbag (201), a gas generator (202), an intake pipe (203), an air supply pipe (204), an exhaust pipe (205), a vent valve (206), a support plate (207), a slide groove (208), a sliding plate (209), and a locking rod (210). The buffer airbag (201) is provided with three sets. The gas generator (202) is fixedly installed on one side of the buffer airbag (201). The gas generator (202) passes through one side. The intake pipe (203) is connected to the air supply pipe (204), the exhaust pipe (205) is fixedly connected to the other side of the buffer airbag (201), the vent valve (206) is located above the exhaust pipe (205), the inner side of the support plate (207) is provided with a sliding groove (208), the support plate (207) is tightly fitted with the slide plate (209), the support plate (207) and the slide plate (209) are each provided with four sets, the locking rod (210) is located on the inner wall of the slide plate (209), and the position of the locking rod (210) corresponds to the sliding groove (208).

2. The automotive bumper based on thermoplastic composite material according to claim 1, characterized in that: The buffer airbag (201) is provided with a buffer energy absorption layer (3) behind it, and the buffer energy absorption layer (3) is made of foamed polypropylene material.

3. A car bumper based on thermoplastic composite material according to claim 2, characterized in that: The buffer energy-absorbing layer (3) is fitted with a crash beam (5) behind it, and a number of springs (4) are provided between the crash beam (5) and the buffer energy-absorbing layer (3).

4. A car bumper based on thermoplastic composite material according to claim 3, characterized in that: The anti-collision beam (5) is fixedly installed on both sides of the rear. The anti-collision beam (5) is made of carbon fiber reinforced thermoplastic. The mounting plate (6) is fixedly installed on the rear of the mounting plate (6). The mounting plate (6) and the mounting plate (7) are each provided with two sets. The mounting plate (6) and the mounting plate (7) are both provided with mounting holes (8). There are several mounting holes (8).

5. A car bumper based on thermoplastic composite material according to claim 1, characterized in that: A bumper inner shell (102) is provided behind the bumper outer shell (1). Both the bumper outer shell (1) and the bumper inner shell (102) are made of modified polypropylene material. A reinforcing layer (101) is provided between the bumper outer shell (1) and the bumper inner shell (102). A collision sensor (103) is provided behind the bumper inner shell (102).

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